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Letteratura scientifica selezionata sul tema "MMWAVE PROPAGATION"

Autore: Grafiati

Pubblicato: 26 ottobre 2023

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Articoli di riviste sul tema "MMWAVE PROPAGATION"

Al-Saman, Ahmed, Michael Cheffena, Olakunle Elijah, Yousef A. Al-Gumaei, Sharul Kamal Abdul Rahim e Tawfik Al-Hadhrami. "Survey of Millimeter-Wave Propagation Measurements and Models in Indoor Environments". Electronics 10, n. 14 (11 luglio 2021): 1653. http://dx.doi.org/10.3390/electronics10141653.

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The millimeter-wave (mmWave) is expected to deliver a huge bandwidth to address the future demands for higher data rate transmissions. However, one of the major challenges in the mmWave band is the increase in signal loss as the operating frequency increases. This has attracted several research interests both from academia and the industry for indoor and outdoor mmWave operations. This paper focuses on the works that have been carried out in the study of the mmWave channel measurement in indoor environments. A survey of the measurement techniques, prominent path loss models, analysis of path loss and delay spread for mmWave in different indoor environments is presented. This covers the mmWave frequencies from 28 GHz to 100 GHz that have been considered in the last two decades. In addition, the possible future trends for the mmWave indoor propagation studies and measurements have been discussed. These include the critical indoor environment, the roles of artificial intelligence, channel characterization for indoor devices, reconfigurable intelligent surfaces, and mmWave for 6G systems. This survey can help engineers and researchers to plan, design, and optimize reliable 5G wireless indoor networks. It will also motivate the researchers and engineering communities towards finding a better outcome in the future trends of the mmWave indoor wireless network for 6G systems and beyond.

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Liu, Baobao, Pan Tang, Jianhua Zhang, Yue Yin, Guangyi Liu e Liang Xia. "Propagation Characteristics Comparisons between mmWave and Visible Light Bands in the Conference Scenario". Photonics 9, n. 4 (1 aprile 2022): 228. http://dx.doi.org/10.3390/photonics9040228.

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Millimeter-wave (mmWave) communications and visible light communications (VLC) are proposed to form hybrid mmWave/VLC systems. Furthermore, channel modeling is the foundation of system design and optimization. In this paper, we compare the propagation characteristics, including path loss, root mean square (RMS) delay spread (DS), K-factor, and cluster characteristics, between mmWave and VLC bands based on a measurement campaign and ray tracing simulation in a conference room. We find that the optical path loss (OPL) of VLC channels is highly dependent on the physical size of the photodetectors (PDs). Therefore, an OPL model is further proposed as a function of the distance and size of PDs. We also find that VLC channels suffer faster decay than mmWave channels. Moreover, the smaller RMS DS in VLC bands shows a weaker delay dispersion than mmWave channels. The results of K-factor indicate that line-of-sight (LOS) components mainly account for more power for mmWave in LOS scenarios. However, non-LOS (NLOS) components can be stronger for VLC at a large distance. Furthermore, the K-Power-Means algorithm is used to perform clustering. The fitting cluster number is 5 and 6 for mmWave and VLC channels, respectively. The clustering results reveal the temporal sparsity in mmWave bands and show that VLC channels have a large angular spread.

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Rodríguez-Corbo, Fidel, Leyre Azpilicueta, Mikel Celaya-Echarri, Peio López-Iturri, Imanol Picallo, Francisco Falcone e Ana Alejos. "Millimeter Wave Spatial Channel Characterization for Vehicular Communications". Proceedings 42, n. 1 (14 novembre 2019): 64. http://dx.doi.org/10.3390/ecsa-6-06562.

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With the growing demand of vehicle-mounted sensors over the last years, the amount of critical data communications has increased significantly. Developing applications such as autonomous vehicles, drones or real-time high-definition entertainment requires high data-rates in the order of multiple Gbps. In the next generation of vehicle-to-everything (V2X) networks, a wider bandwidth will be needed, as well as more precise localization capabilities and lower transmission latencies than current vehicular communication systems due to safety application requirements; 5G millimeter wave (mmWave) technology is envisioned to be the key factor in the development of this next generation of vehicular communications. However, the implementation of mmWave links arises with difficulties due to blocking effects between mmWave transceivers, as well as different channel impairments for these high frequency bands. In this work, the mmWave channel propagation characterization for V2X communications has been performed by means of a deterministic in-house 3D ray launching simulation technique. A complex heterogeneous urban scenario has been modeled to analyze the different propagation phenomena of multiple mmWave V2X links. Results for large and small-scale propagation effects are obtained for line-of-sight (LOS) and non-LOS (NLOS) trajectories, enabling inter-data vehicular comparison. These analyzed results and the proposed methodology can aid in an adequate design and implementation of next generation vehicular networks.

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Rodríguez-Corbo, Fidel Alejandro, Leyre Azpilicueta, Mikel Celaya-Echarri, Peio Lopez-Iturri, Ana V. Alejos e Francisco Falcone. "Deterministic Propagation Approach for Millimeter-Wave Outdoor Smart Parking Solution Deployment". Engineering Proceedings 2, n. 1 (14 novembre 2020): 81. http://dx.doi.org/10.3390/ecsa-7-08231.

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Impact factor as an indicator of efficiency or sustainability is entirely correlated with the continuous development of the smart city concept technology application. Intelligent transportation systems (ITSs) and particularly autonomous vehicles are expected to play an important role in this challenging environment. Fast and secure connections will be pivotal in order to achieve this new vehicular communications’ application era. The use of millimeter-wave (mmWave) frequency range is the most promising approach to allow these real-time, high-demand applications that require higher bandwidth with the minimum possible latency. However, an in-depth mmWave-channel characterization of the environment is required for a proper mmWave-based solution deployment. In this work, a complete radio wave propagation channel characterization for a mmWave smart parking solution deployment in a complex outdoor environment was assessed at a 28 GHz frequency band. The considered scenario is a parking lot placed in an open free university campus area surrounded by inhomogeneous vegetation. The vehicle and vegetation density within the scenario, in terms of inherent transceivers density and communication impairments, leads to overall system operation challenges, given by multiple communication links operation at line-of-sight (LOS) and non-line-of-sight (NLOS) conditions. By means of an in-house developed 3D ray launching (3D-RL) algorithm, the impact of variable vegetation density is addressed, providing precise modelling estimations of large-scale multipath propagation effects in terms of received power levels and path loss. The obtained results along with the proposed simulation methodology can aid in an adequate characterization of an mmWave communication channel for new vehicular communications networks, applications, and deployments, considering the outdoor conditions as well as the impact of different vegetation densities, for current as well as for future wireless technologies.

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Gulfam, Sardar, Syed Nawaz, Konstantinos Baltzis, Abrar Ahmed e Noor Khan. "Characterization of Fading Statistics of mmWave (28 GHz and 38 GHz) Outdoor and Indoor Radio Propagation Channels". Technologies 7, n. 1 (9 gennaio 2019): 9. http://dx.doi.org/10.3390/technologies7010009.

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Extension of usable frequency spectrum from microwave to millimeter-wave (mmWave) is one of the key research directions in addressing the capacity demands of emerging 5th-generation communication networks. This paper presents a thorough analysis on the azimuthal multipath shape factors and second-order fading statistics (SOFS) of outdoor and indoor mmWave radio propagation channels. The well-established analytical relationship of plain angular statistics of a radio propagation channel with the channel’s fading statistics is used to study the channel’s fading characteristics. The plain angle-of-arrival measurement results available in the open literature for four different outdoor radio propagation scenarios at 38 GHz, as well as nine different indoor radio propagation scenarios at 28 GHz and 38 GHz bands, are extracted by using different graphical data interpretation techniques. The considered quantifiers for energy dispersion in angular domain and SOFS are true standard-deviation, angular spread, angular constriction, and direction of maximum fading; and spatial coherence distance, spatial auto-covariance, average fade duration, and level-crossing-rate; respectively. This study focuses on the angular spread analysis only in the azimuth plane. The conducted analysis on angular spread and SOFS is of high significance in designing modulation schemes, equalization schemes, antenna-beams, channel estimation, error-correction techniques, and interleaving algorithms; for mmWave outdoor and indoor radio propagation environments.

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Rahayu, Ismalia, e Ahmad Firdausi. "5G Channel Model for Frequencies 28 GHz, 73 GHz and 4 GHz with Influence of Temperature in Bandung". Jurnal Teknologi Elektro 13, n. 2 (31 maggio 2022): 94. http://dx.doi.org/10.22441/jte.2022.v13i2.006.

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The 5G channel model is the latest research on future cellular communication by considering the proposed millimeter wave (mmwave) as an enabling technology for the realization of connectivity in the 5G era. However, mmwave signal propagation suffers a high propagation loss to sensitivity to delay, resulting in a high probability and a low signal to signal ratio (SNR). This can take into account the potential for millimeter wave (mmwave) frequencies of 28, 73 and 4 GHz which are capable of meeting wide bandwidth requirements and data rates of up to Gbps for various scenarios such as Urban Microcell (UMi) and Urban Macrocell (UMa). The area used to conduct this research is in Indonesia because it is a tropical region that has high rainfall so that it can determine the effect that occurs when it is at maximum and minimum temperatures in each month. Therefore, to determine the characteristics of the 28, 73 and 4 GHz channels in the city of Bandung. This study discusses large-scale mmwave characteristics such as path loss, delay spread and power delay profile for line-of-sight (LOS) and non-line-of-sight (NLOS) cases and compares directional and omnidirectional propagation. In this study the Urban Microcell (UMi) scenario was carried out at a distance of 20 meters to 200 meters with a frequency of 28 GHz and 73 GHz, then for the Urban Macro cell (UMa) scenario at a frequency of 4 GHz with a distance of 50 meters to 500 meters.

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Dos Anjos, Andre Antonio, Tiago Reis Rufino Marins, Carlos Rafael Nogueira Da Silva, Vicent Miquel Rodrigo Penarrocha, Lorenzo Rubio, Juan Reig, Rausley Adriano Amaral De Souza e Michel Daoud Yacoub. "Higher Order Statistics in a mmWave Propagation Environment". IEEE Access 7 (2019): 103876–92. http://dx.doi.org/10.1109/access.2019.2930931.

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Yao, H., X. Wang, H. Qi e X. Liang. "TIGHTLY COUPLED INDOOR POSITIONING USING UWB/MMWAVE RADAR/IMU". International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVI-3/W1-2022 (5 maggio 2022): 323–29. http://dx.doi.org/10.5194/isprs-archives-xlvi-3-w1-2022-323-2022.

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Abstract. The ultra-wideband (UWB)-based positioning has a wide internet of things applications such as smart medical and smart logistics, due to its high positioning accuracy. However, non-line-of-sight radio propagation degrades UWB positioning accuracy. The inertial measurement unit (IMU) can achieve positioning with high accuracy in a short time. In addition, the millimeter wave (mmWave) radar can work well in scenes such as fog, smoke, dust, and other small particles due to the longer wavelength of mmWave Radar, but the drift error of IMU and mmWave radar are all increased rapidly over time. This paper achieves the tight coupling of UWB and IMU, UWB and mmWave radar based on the extended Kalman filter, respectively. The field experiments were conducted based on a handheld platform in an indoor scene to evaluate and compare the performance of the fusion position systems; the experiment results demonstrated that the positioning accuracy by fusing UWB/IMU and UWB/mmWave was significantly higher than that of the positioning using a single sensor.

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Jiang, Ting, Maozhong Song, Xiaorong Zhu e Xu Liu. "Channel Estimation for Broadband Millimeter Wave MIMO Systems Based on High-Order PARALIND Model". Wireless Communications and Mobile Computing 2021 (23 novembre 2021): 1–12. http://dx.doi.org/10.1155/2021/6408442.

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Channel state information (CSI) is important to improve the performance of wireless transmission. However, the problems of high propagation path loss, multipath, and frequency selective fading make it difficult to obtain the CSI in broadband millimeter-wave (mmWave) system. Based on the inherent multidimensional structure of mmWave multipath channels and the correlation between channel dimensions, mmWave multiple input multiple output (MIMO) channels are modelled as high-order parallel profiles with linear dependence (PARALIND) model in this paper, and a new PARALIND-based channel estimation algorithm is proposed for broadband mmWave system. Due to the structural property of PARALIND model, the proposed algorithm firstly separates the multipath channels of different scatterers by PARALIND decomposition and then estimates the channel parameters from the factor matrices decomposed from the model based on their structures. Meanwhile, the performance of mmWave channel estimation is analysed theoretically. A necessary condition for channel parameter estimation is given based on the uniqueness principle of PARALIND model. Simulation results show that the proposed algorithm performs better than traditional compressive sensing-based channel estimation algorithms.

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Idan, Hayder R., Basim K. AL-Shammari e Hasan F. Khazal. "mmWave Compound Link Budget Model of Dust and Humidity Effect". Wasit Journal of Engineering Sciences 11, n. 1 (1 aprile 2023): 45–60. http://dx.doi.org/10.31185/ejuow.vol11.iss1.323.

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mmWave Path Loss (PL) Link Budget (LB) modeling considerations are based on many different factors. For instance, the third generation partnership project (3GPP) model is mainly based on the distance from an Access Point (AP) and the frequency of transmission as well as the transmission link budget situation. Furthermore, there are certain interesting models about the effects of dust and humidity on the mmWave propagation. These models had introduced the consequences of the humid and dusty environments without consideration for the additional mmWave transmission LB parameters. First of all, this paper introduces an average dust and humidity model based on statistical Z-test in order to overcome the variation in the results between the three chosen models for dust and humidity effect in the mmWave range. Secondly, it proposes LB compound model, that comprises 3GPP PL LB with an average dust and humidity model. This introduced compound model has been applied on RMa PL LB with and without the presence of dust and humidity. The simulation of the presented model has been applied for distinct distances from the AP and mmWave transmission frequency range from 0.5 to 30 GHz.

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Più fonti

Tesi sul tema "MMWAVE PROPAGATION"

Baldù, Giuseppe. "Characterization of millimeter wave propagation in indoor office environments". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amslaurea.unibo.it/25096/.

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For the last few decades, the millimeter wave frequency band (30–300 GHz) has been seen as a serious candidate to host very high data rate communications. In order to design the next-generation (5G and beyond) radio communication systems, it is prerequisite to properly model the radio propagation channel and to know the electromagnetic properties of different materials in this frequency band. This work presents some measurements carried out in a typical office environment at 28 GHz, with the aim of analyzing the main propagation mechanisms and characterizing the electromagnetic properties of some common construction materials.

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Olbert, Jaroslav. "Modelování propagace signálu bezdrátových sítí LTE a WiFi uvnitř budov". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-317037.

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Masters thessis deals with the problematics of wireless signal propagation modeling inside buildings. The theoretical part of this thessis describes principles and methods of electromagnetic waves spreading in open areas and in indoor deployment. There are also described methods used for calculating the path of signal propagation ray-launching and ray-tracing. This part also includes description of an algorithm and equations used for simulating 5GHz WiFi signal propagation inside the Department of telecommunications corridors. Second part of this thessis includes a description of a NS-3 module mmWave, which was used for simulations of IEEE 802.11ad (WiGig) standard. There are also results of these simulations and their detailed description. At the end of this thessis comparison of these results with values gained by real environment measurements can be found.

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Zeman, Kryštof. "Modelování propagačního kanálu pro off-body komunikaci v oblasti milimetrových vln". Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-403857.

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Předkládaná disertační práce je zaměřena na \uv{Modelování propagačního kanálu pro off-body komunikaci v oblasti milimetrových vln}. Navzdory pokrokům v rámci bezdrátových sítí v přímé blízkosti člověka stále systémy 5. generace postrádají dostatečnou šířku pásma a dostatečně nízkou odezvu. To je způsobeno neefektivním využíváním rádiového spektra. Tento nedostatek je potřeba co nejdříve odstranit a právě z tohoto důvodu je hlavním cílem této práce navrhnout vylepšený model rádiového kanálů pro off-body komunikaci. Úkolem tohoto modelu je umožnit uživatelům efektivněji a přesněji simulovat propagaci signálu v rámci daného prostředí. Navržený model je dále optimalizován a ověřen vůči nejnovějším měřením, získaným z literatury. Nakonec je tento model implementován do simulačního nástroje NS-3, pomocí kterého je následně využit k simulaci množství scénářů. Hlavním výstupem této práce je ověřený model přenosového kanálu pro off-body komunikaci v rámci milimetrových vln, společně s jeho implementací do simulačního nástroje NS-3, díky čemuž je dostupný pro širokou veřejnost.

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Shareef, O. A., M. M. Abdulwahid, M. F. Mosleh e Raed A. Abd-Alhameed. "The Optimum Location for Access Point Deployment based on RSS for Indoor Communication". 2019. http://hdl.handle.net/10454/16995.

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Yes
In indoor wireless communication networks, the optimal locations had been known to deploy the access points (AP's) which has a significant impact on improving various aspects of network operation, management, and coverage. In addition, develop the behavioral characteristics of the wireless network. The most used approach for localization purposes was based on Received Signal Strength (RSS) measurements, which is widely used in the wireless network. As well as, it can be easily accessed from different operating systems. In this paper, we proposed an optimal AP localization algorithm based on RSS measurement obtained from different received points. This localization algorithm works as a complementary to the 3D Ray tracing model based REMCOM wireless InSite software and considered two-step localization approach, data collection phase, and localization phase. Obtained result give relatively high accuracy to select the optimum location for AP compare with other selected locations. It is worth to mention that effect of different building materials on signal propagation has been considered with specifying the optimum location of deployment. Furthermore, channel characterizations that based on path losses have been considered as a confirmation for the optimum location being selected.

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AGRAWAL, SACHIN KUMAR. "SOFTWARE DEFINED RADIO ATTENUATION CONTROL IN 5G COMMUNICATION SYSTEM". Thesis, 2019. http://dspace.dtu.ac.in:8080/jspui/handle/repository/17129.

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Millimeter wave (mmWave) frequencies are under research for providing high speed data spectrum for upcoming 5th Generation (5G) communicationsystem. The mmWave frequencies suffer with high propagation attenuation due to various channel obstruc tions. There is a demand and need to have an effective method for efﬁcient mmWave propagation. The focus of this thesis is to identify the various channel obstructions along with their effect on mmWave propagation in terms of attenuation and channel capacity to have desired controlled user data rate. In this research, we propose an innovative method for intelligently selecting a grid or group of grids having minimal mmWave propagation attenuation to overcome the effect of obstructions at the transmission end. The proposed 5G ML transmitter system keeps learning mmWave propagation vegetation attenuation values. The ML unit pre dicts the vegetation attenuation values using regression mode with the algorithms like K-Nearest Neighbors, Decision Tree and Random Forest and also predicts Shannon channel capacity (SCC). Further, we present mmWave propagation losses dataset for four Indian major urban cities like Delhi, Mumbai, Kolkata and Chennai locations in the presence of atmospheric impairments. The simulations have also been performed for the mmWave frequencies 28 GHz, 37 GHz and 39 GHz. The thesis research and results can be used for transmission power loss budget analysis, transmission power control, beamforming, SCC analysis and etc. It signiﬁcantly improves the 5G system performance by saving the transmitter power radiation and provides multigigabit data rates.

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Libri sul tema "MMWAVE PROPAGATION"

Rappaport, Theodore S., Kate A. Remley, Camillo Gentile, Andreas F. Molisch e Alenka Zajić, a cura di. Radio Propagation Measurements and Channel Modeling: Best Practices for Millimeter-Wave and Sub-Terahertz Frequencies. Cambridge University Press, 2022. http://dx.doi.org/10.1017/9781009122740.

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This book offers comprehensive, practical guidance on RF propagation channel characterization at mmWave and sub-terahertz frequencies, with an overview of both measurement systems and current and future channel models. It introduces the key concepts required for performing accurate mmWave channel measurements, including channel sounder architectures, calibration methods, channel sounder performance metrics and their relationship to propagation channel characteristics. With a comprehensive introduction to mmWave channel models, the book allows readers to carefully review and select the most appropriate channel model for their application. The book provides fundamental system theory accessible in a step by step way with clear examples throughout. With inter- and multidisciplinary perspectives, the reader will observe the tight interaction between measurements and modeling for these frequency bands and how different disciplines interact. This is an excellent reference for researchers, including graduate students, working on mmWave and sub-THz wireless communications, and for engineers developing communication systems.

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Capitoli di libri sul tema "MMWAVE PROPAGATION"

Ponomarenko-Timofeev, Aleksei, Aleksandr Ometov e Olga Galinina. "Ray-Based Modeling of Unlicensed-Band mmWave Propagation Inside a City Bus". In Lecture Notes in Computer Science, 269–81. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30859-9_23.

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Ponomarenko-Timofeev, Aleksei, Vasilii Semkin, Pavel Masek e Olga Galinina. "Characterizing mmWave Radio Propagation at 60 GHz in a Conference Room Scenario". In Lecture Notes in Computer Science, 381–93. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01168-0_35.

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Shamsan, Zaid Ahmed. "A Statistical Channel Propagation Analysis for 5G mmWave at 73 GHz in Urban Microcell". In Lecture Notes on Data Engineering and Communications Technologies, 748–56. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70713-2_68.

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"mmWave Propagation Modelling: Atmospheric Gaseous and Rain Losses". In 5G Physical Layer Technologies, 241–88. Chichester, UK: John Wiley & Sons, Inc., 2019. http://dx.doi.org/10.1002/9781119525547.ch6.

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"Millimeter-Wave (mmWave) Radio Propagation Characteristics ....... JOONGHEON KIM". In Opportunities in 5G Networks, 481–500. CRC Press, 2016. http://dx.doi.org/10.1201/b19698-26.

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Al-Kamali, Faisal, Mohamed Alouzi, Claude D’Amours e Francois Chan. "Architectures for Hybrid Precoding and Combining Techniques in Massive MIMO Systems Operating in the mmWave Band". In MIMO Communications - Fundamental Theory, Propagation Channels, and Antenna Systems [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.112113.

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Hybrid precoding and combining techniques in millimeter-wave (mmWave) multiple-input multiple-output (MIMO) systems with various array architectures have attracted significant interest as a promising technology for the development of 6G wireless communication systems. This approach presents numerous advantages, including reduced complexity, cost, and power consumption, when compared to traditional analog precoding methods. In this chapter, we investigate hybrid precoding and combining techniques for massive MIMO systems operating in the millimeter-wave (mmWave) band, with a focus on different architectures, such as full array (FA), subarray (SA), and hybrid array (HA) architectures. We discuss the system model of each architecture. Additionally, we solve the hybrid precoding and combining optimization problem to maximize the spectral efficiency of each architecture. We then propose iterative hybrid precoding and combining algorithms for all architectures, as well as compare their performance to that of traditional hybrid design methods to demonstrate that the proposed algorithms achieve superior performance with lower complexity and hardware requirements.

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"mmWave Propagation Modelling - Weather, Vegetation, and Building Material Losses". In 5G Physical Layer Technologies, 289–345. Chichester, UK: John Wiley & Sons, Inc., 2019. http://dx.doi.org/10.1002/9781119525547.ch7.

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G., Senbagavalli, T. Kavitha, Aruna Ramalingam e Velvizhi V. A. "6G With TeraHertz Communications". In Advances in Wireless Technologies and Telecommunication, 218–47. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-9636-4.ch011.

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The terahertz band is the next frontier in wireless communications for its ability to unlock significantly wider segments of unused bandwidth. It offers the enhanced transmission bandwidth when compared to mmwave band in 5G networks. Terahertz communication reduces the problem of mmWave bands where the propagation loss is more due to molecule absorption of electromagnetic waves. The development of Reconfigurable MIMO techniques, subwavelength guiding structures, nanoantennas, superlenses, hyperlenses and light concentrators, communication distance can be increased in THz systems. 6G wireless networks will consist of a multitude of small radio cells with shorter communication distances. Base stations of radio cells in the 6G network need to be connected with high-speed wireless, enhanced data rate, minimum energy consumption, and low electromagnetic emission links. These broad band links can be implemented by terahertz waves in 6G networks. Terahertz bands are inevitably going to be the next in line. THz communication will contribute to enabling interesting and needed applications.

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Kourogiorgas, Charilaos, Nektarios Moraitis e Athanasios D. Panagopoulos. "Radio Channel Modeling and Propagation Prediction for 5G Mobile Communication Systems". In Advances in Wireless Technologies and Telecommunication, 1–30. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-8732-5.ch001.

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5G mobile communication networks are emerging in order to cover the extreme needs for high data rates for delivering multimedia data to mobile communication users. The required bandwidth may be found if millimeter wave bands are fully employed for the establishment of such cellular systems. In this Book Chapter the propagation issues for 5G mobile communication systems are rigorously analyzed and presented. Firstly, the most popular scenarios and architectures of the next generation mobile systems are described and the channel models utilized for the evaluation of physical layer techniques (air interface are given. Secondly, the channel effects are described, i.e. effects due to local environment of the transceivers, atmospheric effects and their combination and the state of the art on the modeling of these effects is analytically presented. Finally, future directions for the propagation and channel model prediction for the next generation mobile communication systems -5G millimeter wave cellular systems are analyzed. Open issues and technical challenges of millimeter wave (mmWave) 5G cellular systems are finally described.

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Vuckovic, Katarina, e Nazanin Rahanvard. "Localization Techniques in Multiple-Input Multiple-Output Communication: Fundamental Principles, Challenges, and Opportunities". In MIMO Communications - Fundamental Theory, Propagation Channels, and Antenna Systems [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.112037.

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This chapter provides an overview of localization techniques in Multiple-Input Multiple-Output (MIMO) communication systems. The chapter mainly focuses on sub-6 GHz and mmWave bands. MIMO technology enables high-capacity wireless communication, but also presents challenges for localization due to the complexity of the signal propagation environment. Various methods have been developed to overcome these challenges, which utilize side information such as the map of the area, or techniques such as Compressive Sensing (CS), Deep Learning (DL), Gaussian Process Regression (GPR), or clustering. These techniques utilize wireless communication parameters such as Received Signal Strength Indicator (RSSI), Channel State Information (CSI), Angle-Delay-Profile (ADP), Angle-of-Departure (AoD), Angle-of-Arrival (AoA), or Time-of-Arrival (ToA) as inputs to estimate the user’s location. The goal of this chapter is to offer a comprehensive understanding of MIMO localization techniques, along with an overview of the challenges and opportunities associated with them. Furthermore, it also aims to provide the theoretical background on channel models and wireless channel parameters required to understand the localization techniques.

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Atti di convegni sul tema "MMWAVE PROPAGATION"

Zeman, Krystof, Martin Stusek, Pavel Masek, Jiri Hosek e Jindriska Sedova. "Enhanced 3D Propagation Loss Model for mmWave Communications". In 2018 10th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT). IEEE, 2018. http://dx.doi.org/10.1109/icumt.2018.8631276.

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Antonescu, Bogdan, Miead Tehrani Moayyed e Stefano Basagni. "Outdoor mmWave Channel Propagation Models using Clustering Algorithms". In 2020 International Conference on Computing, Networking and Communications (ICNC). IEEE, 2020. http://dx.doi.org/10.1109/icnc47757.2020.9049734.

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Antonescu, Bogdan, Miead Tehrani Moayyed e Stefano Basagni. "mmWave channel propagation modeling for V2X communication systems". In 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC). IEEE, 2017. http://dx.doi.org/10.1109/pimrc.2017.8292718.

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Prasad, S., M. Meenakshi e P. H. Rao. "Hardware Impairments in mmWave Phased Arrays". In 2022 IEEE Microwaves, Antennas, and Propagation Conference (MAPCON). IEEE, 2022. http://dx.doi.org/10.1109/mapcon56011.2022.10047354.

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Foegelle, M. D. "5G and mmWave Device Measurement Challenges". In 12th European Conference on Antennas and Propagation (EuCAP 2018). Institution of Engineering and Technology, 2018. http://dx.doi.org/10.1049/cp.2018.0742.

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Koslowski, Konstantin, Felix Baum, Luca Buhler, Michael Peter e Wilhelm Keusgen. "Enhancing mmWave Devices with Custom Lenses". In 2022 16th European Conference on Antennas and Propagation (EuCAP). IEEE, 2022. http://dx.doi.org/10.23919/eucap53622.2022.9769338.

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Tishchenko, Anton, Ali Ali, Paul Botham, Fraser Burton, Mohsen Khalily e Rahim Tafazolli. "Reflective Metasurface for 5G mmWave Coverage Enhancement". In 2022 International Symposium on Antennas and Propagation (ISAP). IEEE, 2022. http://dx.doi.org/10.1109/isap53582.2022.9998700.

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Azpilicueta, L., F. A. Rodriguez-Corbo, M. Celaya-Echarri, P. Lopez-Iturri, David G. Michelson e F. Falcone. "Deterministic-Based 5G mmWave Propagation Characterization in Urban Environments". In 2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI). IEEE, 2021. http://dx.doi.org/10.1109/aps/ursi47566.2021.9704243.

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Hoellinger, Joseph, Gloria Makhoul, Raffaele D'Errico e Thierry Marsault. "V2V Dynamic Channel Characterization in 5G mmWave Band". In 2022 International Symposium on Antennas and Propagation (ISAP). IEEE, 2022. http://dx.doi.org/10.1109/isap53582.2022.9998590.

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Karthikeya, G. S., e H. S. Suraj. "mmWave metamaterial inspired coaxial-fed microstrip antenna array for Femtosat". In 2016 Loughborough Antennas & Propagation Conference (LAPC). IEEE, 2016. http://dx.doi.org/10.1109/lapc.2016.7807518.

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