Relevant bibliographies by topics / Massive array

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Massive array'

Author: Grafiati
Published: 4 June 2025
Last updated: 15 July 2025

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Journal articles on the topic "Massive array"

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Lee, Hyukjun, Wonjae Ryu, Wonjin Sung, and Jonghyun Park. "Beamforming for Rotated 3D Multipanel Array Structures for 5G NR MIMO Transmission." International Journal of Antennas and Propagation 2019 (July 7, 2019): 1–11. http://dx.doi.org/10.1155/2019/2830792.

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5G new radio (NR) provides enhanced transmission capabilities to transceivers by utilizing the massive multiple-input multiple-output (MIMO) technology with a significantly increased number of antenna elements. Such transmission requires massive arrays to perform accurate high-gain beamforming over the millimeter-wave frequency band. There is no fixed form of array structures for 5G NR base stations, but they are likely to include multiple subarrays or panels for practicality of implementation and are expected to cover the user equipment (UE) in various locations. In this paper, we propose an array structure to transmit signals over the three-dimensional (3D) space in an isotropic fashion for all types of UEs in ground, aerial, and high-rise building locations, by employing panels on surfaces of a polyhedron. We further derive exact beamforming equations for the proposed array and show the resulting beams provide improved receiver performance over the exiting conventional beamforming. The presented beamforming expressions can be applied to an arbitrary multipanel array with massive antenna elements.
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Noor, Hidayah Muhamad Adnan, Md. Rafiqul Islam, and Zahirul Alam AHM. "Effects of Inter-Element Spacing and Number of Elements on Planar Array Antenna Characteristics." Indonesian Journal of Electrical Engineering and Computer Science 10, no. 1 (2018): 230–40. https://doi.org/10.11591/ijeecs.v10.i1.pp230-240.

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Planar array antenna is seen as one of the innovative solutions of massive MIMO and 5G networks since they provide directive beams. In this paper, planar array antenna with square and rectangular arrangements based on 2 x 2 antenna elements as one subarray was proposed. Then, array factor for the the planar array antenna with up to 64 antenna elements was calculated to analyze the effects of inter-element spacing and number of elements on the antenna characteristics. Higher values of inter-element spacing contributed to higher number of side lobes, narrower main lobe, higher directivity and lower half power beamwidth (HPBW). Inter-element spacing equals to 0.5λ was found to be the most suitable value for planar array antenna design based on the analysis. Meanwhile, higher number of antenna elements increased the value of directivity of the planar array with narrower HPBW. Therefore, there is a tradeoff between directivity and HPBW in designing planar array antenna for massive MIMO application.
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Dicandia, Francesco Alessio, and Simone Genovesi. "Spectral Efficiency Improvement of 5G Massive MIMO Systems for High-Altitude Platform Stations by Using Triangular Lattice Arrays." Sensors 21, no. 9 (2021): 3202. http://dx.doi.org/10.3390/s21093202.

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The beneficial effects of adopting a triangular lattice on phased arrays with regular and periodic grids for high-altitude platform station (HAPS) systems are presented in the scenario of massive MIMO communications operating within the 5G NR n257 and n258 frequency bands. Assessment of a planar array with 64 elements (8 × 8) is provided for both a triangular lattice and a square one in terms of array gain, average sidelobe level (ASLL), and mutual coupling. Particular attention is devoted to illustrating the impact of the antenna array lattice at the system level by evaluating its significant merits, such as its spectral efficiency (SE) and signal-to-interference ratio (SIR). The better performance exhibited by the triangular lattice array in comparison to the square one makes it appealing for the 5G massive MIMO paradigm.
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Gong, Pan, Tanveer Ahmed, and Jianfeng Li. "Three-Dimensional Coprime Array for Massive MIMO: Array Configuration Design and 2D DOA Estimation." Wireless Communications and Mobile Computing 2020 (January 13, 2020): 1–14. http://dx.doi.org/10.1155/2020/2686257.

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In massive multiple-input multiple-output (MIMO) systems, it is critical to obtain the accurate direction of arrival (DOA) estimation. Conventional three-dimensional array mainly focuses on the uniform array. Due to the dense arrangement of the sensors, the array aperture is limited and severe mutual coupling effects arise. In this paper, a coprime cubic array (CCA) configuration design is presented, which is composed of two uniform cubic subarrays and can extend the interelement spacing with a selection of three pairs of coprime integers. Compared with uniform cubic array (UCA), CCA achieves the larger array aperture and less MC effects. And the analytical expression of Cramer–Rao Bound (CRB) for CCA is derived which verifies that the proposed CCA geometry outperforms the conventional UCA in two-dimensional (2D) DOA estimation performance in massive MIMO systems. Meanwhile, we propose a computationally efficient 2D DOA estimation algorithm with high accuracy for CCA. Specifically, we utilize array mapping to extract two uniform arrays from the nonuniform array by exploiting the relation derived from the signal subspace and the two directional matrices. Then, we operate a reduced dimension process on the uniform arrays and convert the 2D spectrum peak searching (SPS) problem into one-dimensional (1D) one, which significantly reduces the computational complexity. In addition, we employ the polynomial root finding technique with a lower complexity instead of 1D SPS to further relieve the computational complexity. Simultaneously, with coprime property, the phase ambiguity problem is solved, which results from the large interelement spacing. Numerical simulation results demonstrate that the proposed algorithm is very computationally efficient without degradation of DOA estimation performance.
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Wu, Wei, Yunfei Wang, Xiaofei Zhang, and Jianfeng Li. "Computationally Efficient Sources Location Method for Nested Array via Massive Virtual Difference Co-Array." Sensors 19, no. 9 (2019): 1961. http://dx.doi.org/10.3390/s19091961.

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In this paper, we derive the discrete Fourier transform (DFT) method for direction of arrival (DOA) estimation by generating the massive virtual difference co-array with the nested array. By contrast with the spatial smoothing (SS) subspace-based methods for nested array, which halve the array aperture, the proposed method can take full advantage of the total array aperture. Since the conventional DFT method is a non-parametric method and is limited by Rayleigh threshold, we perform the phase rotation operation to obtain the fine DOA estimates. Owing to the full utilization of the array aperture and phase rotation operation, the proposed method can achieve better performance than SS subspace-based methods for far-field sources especially with massive virtual difference co-arrays which possess a large number of virtual sensors. Besides, as the fast Fourier transform (FFT) is attractive in practical implementation, the proposed method lowers the computational cost, as compared with the subspace-based methods. Numerical simulation results validate the superiority of the proposed method in both estimation performance and complexity.
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Su, Xin, Jie Zeng, Jingyu Li, et al. "Limited Feedback Precoding for Massive MIMO." International Journal of Antennas and Propagation 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/416352.

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The large-scale array antenna system with numerous low-power antennas deployed at the base station, also known as massive multiple-input multiple-output (MIMO), can provide a plethora of advantages over the classical array antenna system. Precoding is important to exploit massive MIMO performance, and codebook design is crucial due to the limited feedback channel. In this paper, we propose a new avenue of codebook design based on a Kronecker-type approximation of the array correlation structure for the uniform rectangular antenna array, which is preferable for the antenna deployment of massive MIMO. Although the feedback overhead is quite limited, the codebook design can provide an effective solution to support multiple users in different scenarios. Simulation results demonstrate that our proposed codebook outperforms the previously known codebooks remarkably.
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Ding, Xuhui, Jiawen Chen, Dekang Liu, Bizheng Liang, and Xiangyuan Bu. "Sparse Multiuser Receiver Design in Large Scale Array System." Electronics 12, no. 4 (2023): 996. http://dx.doi.org/10.3390/electronics12040996.

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This paper focuses on the problem of utilizing millimeter wave (mmWave) and Terahertz (THz) massive hybrid arrays to serve multiple users simultaneously. The mmWave and THz massive arrays are characterized by wide bandwidth and high gain, leading to extensive application prospects. Moreover, a hybrid structure array can combine multiple antenna signals through the phase shifter network. Compared with the full digital array, it is a cost-effective technique that can be functional with fewer radio frequency (RF) chains. However, owing to the adoption of a discrete Fourier transform (DFT) structure, most traditional massive hybrid arrays, which allocate one chain to each user, are restricted to scenarios where the number of RF chains is more than that of users. Otherwise, even users with ideal channel conditions and short distances are inherently difficult to assign an independent chain. Thus, it will limit the scale of users that the base station (BS) can support. Inspired by the above analysis, this paper develops a method to provide service for more users with limited RF chains. Firstly, an analog matrix designing method based on the minimax criterion, which enables arrays access to multiple users, is proposed to guarantee each user a good array gain. Secondly, we establish a receiver designing scheme by the GAMP algorithm to receive signals from multiple users at the same time. Additionally, good bit error rate (BER) performance can be obtained under the condition that the observation matrix is not of full rank. Finally, numerical simulations demonstrate the effectiveness of our proposed method.
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Anam, Mohamad Khoirul, Yudhistira Yudhistira, and Sangjo Choi. "Optimization of Thermoelectric Nanoantenna for Massive High-Output-Voltage Arrays." Nanomaterials 14, no. 13 (2024): 1159. http://dx.doi.org/10.3390/nano14131159.

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Thermoelectric nanoantennas have been extensively investigated due to their ability to directly convert infrared (IR) radiation into direct current without an additional rectification device. In this study, we introduce a thermoelectric nanoantenna geometry for maximum output voltage (Voc) and propose an optimal series array configuration with a finite number of antennas to enhance the Voc. A finite and open-ended SiO2 substrate, with a thickness of a quarter-effective wavelength at a frequency of 28.3 THz, is used to generate standing waves within the substrate. An array of antennas is then positioned optimally on the substrate to maximize the temperature difference (∆T) between hot and cold areas, thereby increasing the average Voc per antenna element. In numerical simulations, a linearly polarized incident wave with a power density of 1.42 W/cm2 is applied to the structure. The results show that a single antenna with the optimum geometry on a substrate measuring 35 µm × 35 µm generates a ∆T of 64.89 mK, corresponding to a Voc of 1.75 µV. Finally, a series array of 5 × 6 thermoelectric nanoantennas on a 150 µm × 75 µm substrate including measurement pads achieves an average ∆T of 49.60 mK with a total Voc of 40.18 µV, resulting in an average Voc of 1.34 µV per antenna element and a voltage responsivity (βv) of 0.77 V/W. This value, achieved solely by optimizing the antenna geometry and open-ended substrate, matches or exceeds the Voc and βv of approximately 1 µV and 0.66 V/W, respectively, from suspended thermoelectric antenna arrays over air cavities. Therefore, the proposed thermoelectric nanoantenna array device, characterized by high stability and ease of fabrication, is suitable for manufacturing massive nanoantenna arrays for high-output IR-DC energy harvesters.
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Lu, Xing, Qizhou Zhang, Jens Kauffmann, and Thushara Pillai. "SMA observations towards massive clouds in the central molecular zone." Proceedings of the International Astronomical Union 9, S303 (2013): 191–93. http://dx.doi.org/10.1017/s1743921314000532.

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AbstractRecently we conducted a mini-survey towards a sample of six massive clouds with surface density >1024 cm−2 in the central molecular zone (CMZ) of the Milky Way, with the SMA at 280 GHz in the compact array and at 230 GHz in the compact/subcompact arrays. The data reveal compact dust continuum peaks, some of which are also associated with organic molecular lines and thermal SiO emission. The subcompact array data helps recover more structures, e.g. the regularly spaced, well-aligned continuum fragments in the 20 km s−1 cloud. Shock tracers such as SiO are found in all the clouds. Our observations suggest potential protostellar origin for some of the dust continuum peaks in these regions.
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Alnajjar, Khawla A., Peter J. Smith, Philip Whiting, and Graeme K. Woodward. "Size and Array Shape for Massive MIMO." IEEE Wireless Communications Letters 4, no. 6 (2015): 653–56. http://dx.doi.org/10.1109/lwc.2015.2477513.

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Dissertations / Theses on the topic "Massive array"

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Rozé, Antoine. "Massive MIMO, une approche angulaire pour les futurs systèmes multi-utilisateurs aux longueurs d’onde millimétriques." Thesis, Rennes, INSA, 2016. http://www.theses.fr/2016ISAR0014/document.

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La densification des réseaux allant de pair avec le déploiement de petites cellules, les systèmes Massive MIMO disposent de caractéristiques prometteuses pour accroître la capacité des réseaux au travers des techniques de formation de faisceau, appelées beamforming. Les transmissions aux longueurs d’onde millimétriques (mmWave) sont, quant à elle, très convoitées car, non seulement les bandes passantes exploitables sont extrêmement larges, mais le canal de propagation est principalement Line-of-Sight (LOS), ce qui correspond à la visibilité directe entre le terminal et la station de base. L’attrait que peut avoir un système multi-utilisateurs Massive MIMO à de telles fréquences provient, en partie, du faible encombrement du réseau d’antennes, mais aussi du fort gain de beamforming dont il permet de bénéficier afin de contrecarrer les fortes pertes en espace libre que subissent les signaux à de telles longueurs d’onde. Dans un premier temps nous montrons comment l’augmentation de la fréquence porteuse impacte les performances de deux précodeurs connus. Au travers d’une modélisation déterministe et géométrique du canal, on simule un scénario Outdoor à faible mobilité et à forte densité de population en mettant en avant l’influence du trajet direct et des trajets réfléchis sur les performances. Plus précisément on prouve qu’en configuration purement LOS, le précodeur Zero-Forcing est beaucoup plus sensible à la structure du réseau d’antennes, et à la position des utilisateurs, que le Conjugate Beamforming (aussi connu sous le nom de retournement temporel). On introduit alors un précodeur basé uniquement sur la position angulaire des utilisateurs dans la cellule en référence à la station de base, puis l’on compare ses performances à celles des deux autres. La robustesse d’une telle implémentation à une erreur d’estimation d’angles est illustrée pour un scénario spécifique afin de souligner la pertinence des solutions angulaires, une direction étant plus facile à estimer et son évolution dans le temps plus prévisible.On décrit dans un second temps comment la connaissance des positions angulaires des utilisateurs permet d’accroître la capacité de la cellule par le biais d’un procédé d’allocation de puissance reposant sur une évaluation de l’interférence que chaque faisceau génère sur les autres. On prouve à l’aide de simulations que l’obtention de cette interférence, même exprimée sous une forme très simplifiée, permet d’améliorer très nettement la capacité totale de la cellule. Enfin, nous introduisons les systèmes Hybrides Numériques et Analogiques ayant récemment été proposés afin de permettre à une station de base de conserver un large nombre d’antennes, nécessaire à l’obtention d’un fort gain de beamforming, tout en réduisant le nombre de chaînes Radiofréquences (RF). On commence par décrire une solution permettant à un terminal de former un faisceau dont la direction s’adapte à sa propre inclinaison, en temps réel, pour toujours viser la station de base. On compare ensuite les performances de tels récepteurs, associés à des stations de base Massive MIMO, avec celles d’une solution hybride connue, le nombre de chaînes RF des deux systèmes étant identiques. Principalement, la flexibilité et la capacité d’évolution de ces systèmes est mise en avant, ces deux atouts étant particulièrement pertinents pour de nombreux environnements à forte densité de population<br>As wireless communication networks are driven toward densification with small cell deployments, massive MIMO technology shows great promises to boost capacity through beamforming techniques. It is also well known that millimeter-Wave systems are going to be an important part of future dense network solutions because, not only do they offer high bandwidth, but channel is mostly Line-of-Sight (LOS). The attractiveness of using a multi-user Massive MIMO system at these frequencies comes partly from the reduced size of a many antenna base station, but also from the high beamforming gains they provide, which is highly suited to combat the high path losses experienced at such small wavelengths. First we show how raising the carrier frequency impacts the performance of some linear precoders widely used in Massive MIMO systems. By means of a geometrical deterministic channel model, we simulate a dense outdoor scenario and highlight the influence of the direct and multi-paths components. More importantly we prove that, in a Line-of-Sight (LOS) configuration, the discriminating skill of the well-known Zero Forcing precoder is much more sensitive to the antenna array structure and the user location than the Conjugate Beamforming precoder, also known as Time-Reversal. A precoder based on the knowledge of the angular position of all users is then introduced and compared to the other precoders based on channel response knowledge. Its robustness against angle estimation error is illustrated for a specific scenario and serves to back up the importance such a solution represents for future dense 5G networks, angular information being easier to estimate, and more so to keep track of.After that, we show how the knowledge of Directions of Arrival can be used to increase the sum capacity of a multi-user transmission through leakage based power allocation. This allocation uses an estimation of inter-user interference, referred to as Leakage, and we show through simulations how this factor, even under its most simplified form, improves realistic transmissions. Moreover this solution is not iterative and is extremely easy to implement which makes it particularly well suited for high deployment scenarios.Finally we introduce the Hybrid Analog and Digital Beamforming systems that have recently emerged to retain a high number of antennas without as many Radio Frequency (RF) chains, in order to keep high beamforming gains while lowering the complexity of conceiving many antenna base stations. We first describe a user equipment solution allowing the system to form a beam that adapts to its own movement so that it always focuses its energy toward the base station, using an on-board analog array and an Inertial Measurement Unit. Then we compare the performance of a known Hybrid solution with a fully digital Massive MIMO system, having as many RF chains as the Hybrid system, but serving user equipments with beamforming abilities. Mostly we emphasize how such a system allows for great flexibility and evolution, both traits being invaluable features in many future networks
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Lotti, Marina, and Marina Lotti. "Experimental characterization of millimeter-wave radars for mapping and localization." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/19891/.

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L’attività di tesi è inquadrata nell’ambito del progetto europeo PRIMELOC (Personal Radars for Radio Imaging and Infrastructure-less Localization) il cui scopo è quello di validare il concetto di radar personale per fornire servizi automatici di localizzazione e di mappatura degli ambienti indoor, evitando l’introduzione di infrastrutture ad hoc. Per far ciò, si vogliono sfruttare i dispositivi di future generazioni wireless che usano onde millimetriche, per costruire mappe di luoghi indoor. Le mappe sono ottenute scannerizzando l’ambiente circostante attraverso l’uso di massive antenna arrays ad onde millimetriche e di particolari algoritmi per la localizzazione e il mapping simultanei (simultaneous localization and mapping - SLAM). Per la validazione sperimentale del concetto di Personal Radar è fondamentale l’esecuzione di diverse campagne di misura in ambienti realistici. I dati raccolti da esse devono essere valutati e processati al fine di renderli adatti come input degli algoritmi di SLAM.
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Wannas, Hussain. "Full Duplex Multiuser MIMO with Massive Arrays." Thesis, Linköpings universitet, Institutionen för systemteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-105268.

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Half-Duplex Multiuser Multiple-Input Multiple-Output (HD MU-MIMO) systemscurrently employed in communication systems are not experiencing the selfinterference(SI) problem but they are not optimal in terms of efficiency and interms of resources used (time and frequency resources). Ignoring the effect of largescalefading, we start by explaining the uplink (UL) and downlink (DL) parts ofthe MU-MIMO system and how the sum-rate is calculated. We also introduce thethree linear receivers/precoders, Maximum-Ratio Combining (MRC)/Maximum-Ratio Transmission (MRT), Zero-Forcing (ZF), and Minimum Mean-Square Error(MMSE) and which of the three types is going to be used in the study of Full-Duplex Multiuser Multiple-input Multiple-output (FD MU-MIMO) system. Thenwe introduce FD MU-MIMO system, and how the equation used to calculate thesum-rate of the UL part changes when the SI occurs, and why SI problem is notpresent in the DL part. Next, we introduce the spectral efficiency (SE), and howto calculate it and why it is taken as a parameter to compare HD and FD systems.Also the effect of SI on FD MU-MIMO system is presented through simulationgraphs, then we move to show how to reduce SI effect by increasing the number ofantennas in the base-station (BS). Lastly, we take the effect of large scale fading inorder to reach a simple statistical model in the form cumulative distribution function(CDF) graph for different values of SI and compare those of FD MU-MIMOsystem to HD MU-MIMO. The results show that FD MU-MIMO together withmassive MIMO technology is very promising and would save time and frequencyresources which means an increase in the SE but SI must be below a certain level.
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Savaş, Süleyman. "Linear Algebra for Array Signal Processing on a Massively Parallel Dataflow Architecture." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-4137.

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<p>This thesis provides the deliberations about the implementation of Gentleman-Kung systolic array for QR decomposition using Givens Rotations within the context of radar signal processing. The systolic array of Givens Rotations is implemented and analysed using a massively parallel processor array (MPPA), Ambric Am2045. The tools that are dedicated to the MPPA are tested in terms of engineering efficiency. aDesigner, which is built on eclipse environment, is used for programming, simulating and performance analysing. aDesigner has been produced for Ambric chip family. 2 parallel matrix multiplications have been implemented to get familiar with the architecture and tools. Moreover different sized systolic arrays are implemented and compared with each other. For programming, ajava and astruct languages are provided. However floating point numbers are not supported by the provided languages. Thus fixed point arithmetic is used in systolic array implementation of Givens Rotations. Stable </p><p>and precise numerical results are obtained as outputs of the algorithms. However the analysis results are not reliable because of the performance analysis tools.</p>
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Savaş, Süleyman. "Linear Algebra for Array Signal Processing on a Massively Parallel Dataflow Architecture." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2192.

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<p>This thesis provides the deliberations about the implementation of Gentleman-Kung systolic array for QR decomposition using Givens Rotations within the context of radar signal </p><p>processing. The systolic array of Givens Rotations is implemented and analysed using a massively parallel processor array (MPPA), Ambric Am2045. The tools that are dedicated to the MPPA are tested in terms of engineering efficiency. aDesigner, which is built on eclipse environment, is used for programming, simulating and performance analysing. aDesigner has been produced for Ambric chip family. 2 parallel matrix multiplications have been implemented </p><p>to get familiar with the architecture and tools. Moreover different sized systolic arrays are implemented and compared with each other. For programming, ajava and astruct languages are provided. However floating point numbers are not supported by the provided languages. </p><p>Thus fixed point arithmetic is used in systolic array implementation of Givens Rotations. Stable and precise numerical results are obtained as outputs of the algorithms. However the analysis </p><p>results are not reliable because of the performance analysis tools.</p>
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Kunz, Eben A. "Low cost analog signal processing for massive radio telescope arrays." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/77079.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 38).<br>Measurement and analysis of redshifted 21cm hydrogen emissions is a developing technique for studying the early universe. The primary time of interest corresponds to a signal in the the 100-200MHz frequency band. The Omniscope is a new type of radio telescope array being developed at MIT which images the entire sky in this band at low resolution using spatial Fourier transforms. In order to gain the maximum benefit from this type of telescope, a regular array of more than 10,000 antennas will eventually be necessary. I detail a low cost analog signal path which was developed to test and refine the signal processing and imaging pathways of the Omniscope. This signal path begins at the output of a preexisting antenna design and ends with digitization.<br>by Eben A. Kunz.<br>M.Eng.
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Khanfar, Husni. "Implementing CAL Actor Component on Massively Parallel Processor Array." Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-14080.

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Sewell, Carleton Paul. "Massively parallel circuit simulation on the distributed array processor." Thesis, Queen Mary, University of London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285163.

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Pasila, Felix <1974&gt. "Inverse Static Analysis of Massive Parallel Arrays of Three-State Actuators via Artificial Intelligence." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5907/1/Pasila_Felix_tesi.pdf.

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Massive parallel robots (MPRs) driven by discrete actuators are force regulated robots that undergo continuous motions despite being commanded through a finite number of states only. Designing a real-time control of such systems requires fast and efficient methods for solving their inverse static analysis (ISA), which is a challenging problem and the subject of this thesis. In particular, five Artificial intelligence methods are proposed to investigate the on-line computation and the generalization error of ISA problem of a class of MPRs featuring three-state force actuators and one degree of revolute motion.
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Pasila, Felix <1974&gt. "Inverse Static Analysis of Massive Parallel Arrays of Three-State Actuators via Artificial Intelligence." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5907/.

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Massive parallel robots (MPRs) driven by discrete actuators are force regulated robots that undergo continuous motions despite being commanded through a finite number of states only. Designing a real-time control of such systems requires fast and efficient methods for solving their inverse static analysis (ISA), which is a challenging problem and the subject of this thesis. In particular, five Artificial intelligence methods are proposed to investigate the on-line computation and the generalization error of ISA problem of a class of MPRs featuring three-state force actuators and one degree of revolute motion.
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Books on the topic "Massive array"

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R, Biswas, and United States. National Aeronautics and Space Administration., eds. Unstructured adaptive grid computations on an array of SMPs. Research Institute for Advanced Computer Science, NASA Ames Research Center, 1996.

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Barker, Graeme. The Agricultural Revolution in Prehistory. Oxford University Press, 2006. http://dx.doi.org/10.1093/oso/9780199281091.001.0001.

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The Agricultural Revolution in Prehistory addresses one of the most debated and least understood revolutions in the history of our species, the change from hunting and gathering to farming. Graeme Barker takes a global view, and integrates a massive array of information from archaeology and many other disciplines, including anthropology, botany, climatology, genetics, linguistics, and zoology. Against current orthodoxy, Barker develops a strong case for the development of agricultural systems in many areas as transformations in the life-ways of the indigenous forager societies, and argues that these were as much changes in social norms and ideologies as in ways of obtaining food. With a large number of helpful line drawings and photographs as well as a comprehensive bibliography, this authoritative study will appeal to a wide general readership as well as to specialists in a variety of fields.
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Lindenmayer, David, Mason Crane, Damian Michael, and Esther Beaton. Woodlands. CSIRO Publishing, 2005. http://dx.doi.org/10.1071/9780643093164.

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Australia's little known woodlands once covered huge areas of the eastern side of our continent. Woodlands are distinguished from forests by the fact that their canopies do not touch, tree heights are usually lower and they usually have a grassy understorey. They support a fascinating and diverse array of birds, mammals, reptiles, frogs, invertebrates and plants, and have been under massive pressure from grazing and agriculture over the past 200 years. In many cases only small remnant patches of some types of woodland survive. Understanding and appreciating woodlands is an important way forward for promoting their sustainable management and conservation.&#x0D; Woodlands: A Disappearing Landscape explains with lucid text and spectacular photographs the role that woodlands play in supporting a range of native plants and animals that has existed there for millions of years.&#x0D; The book is set out as a series of logically linked chapters working from the woodland canopy (the tree crowns), through the understorey, the ground layers, and to the lowest lying parts of landscape – wetlands, creeks and dams. Each chapter illustrates many key topics in woodland biology with text and images, explaining important aspects of woodland ecology as well as woodland management and conservation.
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Roberts, Priscilla. Arab-Israeli Conflict. ABC-CLIO, LLC, 2017. http://dx.doi.org/10.5040/9798400613920.

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Covering the Arab-Israeli conflict from its origins to the present, this valuable resource traces the evolution of this ongoing, seemingly unresolvable dispute through a wide array of primary source documents. Arab-Israeli Conflict: A Documentary and Reference Guide provides a fresh, accessible, and thorough overview of the Arab-Israeli conflict, covering its origins in the late-19th century to the present-day situation and enabling readers to grasp why peace has proved so elusive, despite massive international efforts to reach a permanent and lasting solution to this protracted animosity. Chronological chapters first address the years up to the establishment of Israel in 1948, then move forward to the wars of 1956 and 1967 and their impact; the 1973 Yom Kippur War and early efforts to reach a lasting peace settlement; and the ongoing international and Israeli-Palestinian negotiations since the mid-1980s. Readers will come away with not only an understanding of why so many great powers were from the beginning interested in the fate of the territory known as Palestine and of the current issues from an international perspective, but also an appreciation of the personalities and ethnic backgrounds involved that make the conflict so difficult to resolve.
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Stille, Mark. Philippines Naval Campaign 1944–45. Bloomsbury Publishing Plc, 2024. http://dx.doi.org/10.5040/9781472856975.

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The forgotten story of the major naval operations conducted in the Philippines by the US and Japanese navies after Leyte Gulf up to the US invasion of Luzon in January 1945. The events that took place in the aftermath of the Battle of Leyte Gulf in October 1944 are often overlooked by military historians. An impressive array of naval operations continued in the Philippines up to January 1945, which included (on the Japanese side) the largest convoys to a contested island during the war, the first kamikaze campaign, and the second largest Imperial Japanese Navy surface operation during the last nine months of the conflict. On the American side, US forces were involved in efforts to cut off Leyte from enemy reinforcement, a massive amphibious invasion off Luzon, and large-scale operations by the Fast Carrier Task Force (TF 38). Expert naval historian Mark Stille throws new light on this often forgotten phase of the Pacific naval war. Among the actions covered are the battles for Ormoc Bay, the invasion of Mindoro, Japanese kamikaze attacks, and US Third Fleet's rampage through the South China Sea between January 10 and 20, 1945. Superb battlescene artworks bring the war at sea and in the air vividly to life, and maps and diagrams guide readers through a range of actions in clear, step-by-step detail.
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Cumming, Douglas, ed. The Oxford Handbook of IPOs. Oxford University Press, 2018. http://dx.doi.org/10.1093/oxfordhb/9780190614577.001.0001.

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Firms generally begin as privately owned entities. When they grow large enough, the decision to go public and its consequences are among the most crucial times in a firm’s life cycle. The first time a firm is a reporting issuer gives rise to tremendous responsibilities about disclosing public information and accountability to a wide array of retail shareholders and institutional investors. Initial public offerings (IPOs) offer tremendous opportunities to raise capital. The economic and legal landscape for IPOs has been rapidly evolving across countries. There have been fewer IPOs in the United States in the aftermath of the 2007–2009 financial crisis and associated regulatory reforms that began in 2002. In 1980–2000, an average of 310 firms went public every year, while in 2001–2014 an average of 110 firms went public every year. At the same time, there are so many firms that seek an IPO in China that there has been a massive waiting list of hundreds of firms in recent years. Some countries are promoting small junior stock exchanges to go public early, and even crowdfunding to avoid any prospectus disclosure. Financial regulation of analysts and investment banks has been evolving in ways that drastically impact the economics of going public—in some countries, such as the United States, drastically increasing the minimum size of a company before it can expect to go public. This Handbook not only systematically and comprehensively consolidates a large body of literature on IPOs, but provides a foundation for future debates and inquiry.
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Minow, Martha, and Robert C. "Bobby" Scott. A Federal Right to Education. Edited by Kimberly Jenkins Robinson. NYU Press, 2019. http://dx.doi.org/10.18574/nyu/9781479893287.001.0001.

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This book brings together an array of leading scholars to engage three critical questions surrounding the current debate over a federal right to education. First, should the United States recognize such a right? The authors of part 1 collectively answer this question as they weigh the arguments for and against. They paint a picture of crippling inequality within our schools—sharing accounts of massive racial and socioeconomic disparities along the way—which compels them to form a nearly unanimous consensus that a federal right to education would reap important benefits for all students. But even assuming this is true, a second question remains as to how the United States could establish such a right. Accordingly, the authors of part 2 explore three different mechanisms for establishing a federal right: implying the right through the Constitution, enacting the right in federal law, or adopting it through a constitutional amendment. Finally, if a federal right to education is recognized, what should it guarantee? The authors of part 3 confront this critical substantive question by weaving novel policy solutions together with evidence-based reforms to present options for ensuring that a federal right to education encompasses the tools and policy levers that are necessary to accomplish the goals that reformers espouse. Their proposals also provide key insights for impactful reforms for state courts interpreting education rights as well state lawmakers seeking to improve educational opportunities and outcomes. In response to these and other fundamental questions about the vast opportunity and achievement gaps of American schoolchildren, this volume builds on the current dialogue—both political and scholarly—that contends that education is the critical civil rights issue of our time.
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Orhan, Ayhan, Sema Yilmaz Genc, and Nuray Terzi, eds. Economic and Social Issues: Global and Local Perspective. Glasstree, 2018. http://dx.doi.org/10.20850/9781534203983.

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The process of globalization and its impact on societies and peoples everywhere are topics of great importance today. Recent experiences have been characterized by growing frustration with globalization, reflecting unsatisfactory processes and outcomes in many areas. In the economic area, high financial volatility and a broad sustained deficit have resulted in a frequency of national and international financial crises, and in a global financial crisis unprecedented since the Great Depression. In the social area, disappointment is the result of the uneven way the benefits of globalization have spread in both developed and developing economies. In the environmental area, no effective action has been taken so far to face the unprecedented challenges affected by climate change and the massive destruction of biodiversity. Our world is suffered by environmental problems that consume natural resources and strain livelihoods, many of which are arisen from by poor industrial practices. Environmental problems negatively impact economic and social life, directly and indirectly, environment-related diseases lead to loss of time and efficiency. All these deterioration encompasses a large set of areas, from the economy to social development, to inclusive growth, to macroeconomic and financial stability, to environmental sustainability. In this perspective, the European Congress of Economic Issues (ECOEI) held in Kocaeli in November 2017, which was the second in a series that started in March 2017. The aim of this congress was to assess the disruptive results of globalization in economic and social area and to explore the policy strategies that could help it become a reality. Therefore, this congress was reflected in having special sessions devoted to economic and social issues, including a wide array topics in global trade, economic growth, energy, environment and human development.
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Book chapters on the topic "Massive array"

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Goda, Kazuo. "Massive Array of Idle Disks." In Encyclopedia of Database Systems. Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4899-7993-3_1346-2.

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Goda, Kazuo. "Massive Array of Idle Disks." In Encyclopedia of Database Systems. Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-39940-9_1346.

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Goda, Kazuo. "Massive Array of Idle Disks." In Encyclopedia of Database Systems. Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4614-8265-9_1346.

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Kamali, Mouloud, and Adnen Cherif. "Improved Massive MIMO Cylindrical Adaptive Antenna Array." In Advances in Predictive, Preventive and Personalised Medicine. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11800-6_3.

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Wu, Yi, Ling Bo Han, Wai Hong Chan, and Ge Nong. "Scalable K-Order LCP Array Construction for Massive Data." In Communications in Computer and Information Science. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6442-5_55.

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Cook, Kem H. "A Dual CCD Mosaic Camera System Searching for Massive Compact Halo Objects (MACHOs)." In New Developments in Array Technology and Applications. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0383-1_34.

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Cook, Kem H. "A Dual CCD Mosaic Camera System Searching for Massive Compact Halo Objects (MACHOs)." In New Developments in Array Technology and Applications. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0383-1_59.

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Guo, Lin, and Lijun Yang. "Analysis of Antenna Array Parameter Effect for Massive MIMO Transmission." In Lecture Notes in Computer Science. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-24271-8_35.

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Mujawar, Mehaboob. "Antenna Array Design for Massive MIMO System in 5G Application." In Future Trends in 5G and 6G. CRC Press, 2021. http://dx.doi.org/10.1201/9781003175155-18.

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Gao, Zhen, Ziwei Wan, Yikun Mei, Keke Ying, and Kuiyu Wang. "Compressive Sensing Based Channel Estimation for MmWave Full-Dimensional Lens Antenna Array." In Millimeter-Wave/Sub-Terahertz Ultra-Massive MIMO Transmission Technology. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2388-5_3.

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Conference papers on the topic "Massive array"

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Wong, Kai-Kit. "Compact Ultra Massive Array (CUMA) with 4 RF Chains for Massive Connectivity." In 2024 IEEE 25th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC). IEEE, 2024. http://dx.doi.org/10.1109/spawc60668.2024.10694593.

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Hassett, K., S. F. Gregson, and C. G. Parini. "Implementation of a Novel, Sparse, Irregular, Multi-Probe Array System for the Rapid Production Test of 5G Massive MIMO Antennas." In 2024 IEEE International Symposium on Phased Array Systems and Technology (ARRAY). IEEE, 2024. https://doi.org/10.1109/array58370.2024.10880459.

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Nguyen, Ly V., Duy H. N. Nguyen, Italo Atzeni, Antti Tölli, and A. Lee Swindlehurst. "Channel Estimation in Low-Resolution Near-Field Massive MIMO Systems." In 2024 IEEE 13th Sensor Array and Multichannel Signal Processing Workshop (SAM). IEEE, 2024. http://dx.doi.org/10.1109/sam60225.2024.10636448.

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Averina, Larisa I., Nikita E. Guterman, Kseniya V. Smuseva, and Grigory K. Uskov. "Capacity Maximization Array Design for Massive MIMO Systems with Finite Aperture." In 2024 IEEE 9th All-Russian Microwave Conference (RMC). IEEE, 2024. https://doi.org/10.1109/rmc62880.2024.10846900.

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Yin, Hao-Yu, Zhuo-Wei Miao, Zhang-Cheng Hao, Zhengbo Jiang, and Wei Hong. "A Super-Massive Planar Phased Array with Full-Space Scanning Capability." In 2024 IEEE International Symposium on Antennas and Propagation and INC/USNC‐URSI Radio Science Meeting (AP-S/INC-USNC-URSI). IEEE, 2024. http://dx.doi.org/10.1109/ap-s/inc-usnc-ursi52054.2024.10686744.

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Memarzadeh, Hamidreza, and Gary Xu. "A Massive MIMO Array Antenna Incorporating Filtering Sub-Arrays." In 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting. IEEE, 2019. http://dx.doi.org/10.1109/apusncursinrsm.2019.8888518.

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Biswas, Sudip, Satyanarayana Vuppala, and Tharmalingam Ratnarajah. "Massive 3D Antenna Array mmWave Systems." In 2017 IEEE Global Communications Conference (GLOBECOM 2017). IEEE, 2017. http://dx.doi.org/10.1109/glocom.2017.8254824.

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Foo, Senglee. "Orthogonal-beam-space massive-MIMO array." In 2015 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC). IEEE, 2015. http://dx.doi.org/10.1109/apwc.2015.7300157.

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Halbauer, Hardy, Andreas Weber, Dirk Wiegner, and Thorsten Wild. "Energy Efficient Massive MIMO Array Configurations." In 2018 IEEE Globecom Workshops (GC Wkshps). IEEE, 2018. http://dx.doi.org/10.1109/glocomw.2018.8644331.

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Amarasuriya, Gayan, Shang Liu, and H. Vincent Poor. "Wireless energy harvesting massive MIMO relays." In 2016 IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM). IEEE, 2016. http://dx.doi.org/10.1109/sam.2016.7569750.

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Reports on the topic "Massive array"

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Rothe, R. E. Massive subcritical compact arrays of plutonium metal. Office of Scientific and Technical Information (OSTI), 1998. http://dx.doi.org/10.2172/677063.

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Piercey, S. J., and J. L. Pilote. Nd-Hf isotope geochemistry and lithogeochemistry of the Rambler Rhyolite, Ming VMS deposit, Baie Verte Peninsula, Newfoundland: evidence for slab melting and implications for VMS localization. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328988.

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New high precision lithogeochemistry and Nd and Hf isotopic data were collected on felsic rocks of the Rambler Rhyolite formation from the Ming volcanogenic massive sulphide (VMS) deposit, Baie Verte Peninsula, Newfoundland. The Rambler Rhyolite formation consists of intermediate to felsic volcanic and volcaniclastic rocks with U-shaped primitive mantle normalized trace element patterns with negative Nb anomalies, light rare earth element-enrichment (high La/Sm), and distinctively positive Zr and Hf anomalies relative to surrounding middle rare earth elements (high Zr-Hf/Sm). The Rambler Rhyolite samples have epsilon-Ndt = -2.5 to -1.1 and epsilon-Hft = +3.6 to +6.6; depleted mantle model ages are TDM(Nd) = 1.3-1.5 Ga and TDM(Hf) = 0.9-1.1Ga. The decoupling of the Nd and Hf isotopic data is reflected in epsilon-Hft isotopic data that lies above the mantle array in epsilon-Ndt -epsilon-Hft space with positive ?epsilon-Hft values (+2.3 to +6.2). These Hf-Nd isotopic attributes, and high Zr-Hf/Sm and U-shaped trace element patterns, are consistent with these rocks having formed as slab melts, consistent with previous studies. The association of these slab melt rocks with Au-bearing VMS mineralization, and their FI-FII trace element signatures that are similar to rhyolites in Au-rich VMS deposits in other belts (e.g., Abitibi), suggests that assuming that FI-FII felsic rocks are less prospective is invalid and highlights the importance of having an integrated, full understanding of the tectono-magmatic history of a given belt before assigning whether or not it is prospective for VMS mineralization.
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