Academic literature on the topic 'Multipaths'

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Journal articles on the topic "Multipaths"

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Chen, Zhigang, Lei Wang, and Mengya Zhang. "Virtual Antenna Array and Fractional Fourier Transform-Based TOA Estimation for Wireless Positioning." Sensors 19, no. 3 (2019): 638. http://dx.doi.org/10.3390/s19030638.

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In this paper, a novel virtual antenna array and fractional Fourier transform (FRFT)-based 2-dimension super-resolution time-of-arrival (TOA) estimation algorithm for OFDM WLAN systems has been proposed. The proposed algorithm employs channel frequency responses (CFRs) at the equi-spaced positions on a line or quasi-line moving trajectory, i.e., the CFRs of a virtual antenna array, to extract multipaths’ TOA information. Meanwhile, a new chirp-like quadratic function is used to approximate the channel multipaths’ phase variation across the space dimension, which is more reasonable than the tra
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Shen, Xi Zhong, and Pan Li. "Material Flaw Sizing by Ultrasonic Multipath Detection." Advanced Materials Research 712-715 (June 2013): 1067–70. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1067.

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Sizing of material flaw is addressed in the multipath scene, and a method is developed to detect an isolated sized flaw and estimate its height based on imaging theory of different path profiles. A signal model based on the multipath higher order reflections of the flaw is built to detect the sized flaw. Multipaths are predicted and identified on the basis of the direct reflection path, which is relatively easy to be identified using the conventional flaw detection techniques. Direct reflection path and combined path are applied to detect the flaw from the top, and multipath w is to detect its
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Su, Shuqin, and Richard D. Oleschuk. "A capillary and microchip-based nanoelectrospray emitter using a mesoporous membrane." Canadian Journal of Chemistry 86, no. 11 (2008): 1055–62. http://dx.doi.org/10.1139/v08-154.

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A method is described for the fabrication of multipath electrospray emitters using hydrophobic porous polymer membranes. Polysulphone (PSF) and polycarbonate (PC) membranes, which possess pores with well-defined sizes, are glued onto the exit aperture of fused-silica capillaries or microfluidic chips to create multipaths to assist electrospray at moderate nano flow rates (e.g., 50–500 nL/min). A capillary-based multipath emitter fabricated with either PSF or PC membranes was prepared with a fused-silica capillary with 75 µm inner diameter and 360 µm outer diameter. Relative effects on electros
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Muqaibel, Ali H., Moeness G. Amin, and Fauzia Ahmad. "Target Localization with a Single Antenna via Directional Multipath Exploitation." International Journal of Antennas and Propagation 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/510720.

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Target localization in urban sensing can benefit from angle dependency of the pulse shape at a radar receiver antenna. We propose a localization approach that utilizes the embedded directivity in ultra-wideband (UWB) antennas to estimate target positions. A single radar unit sensing operation of indoor targets surrounded by interior walls is considered, where interior wall multipaths are exploited to provide target cross-range. This exploitation assumes resolvability of the multipath components, which is made possible by the virtue of using UWB radar signals. The proposed approach is most attr
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Blanza, Jojo. "Wireless Propagation Multipaths using Spectral Clustering and Three-Constraint Affinity Matrix Spectral Clustering." Baghdad Science Journal 18, no. 2(Suppl.) (2021): 1001. http://dx.doi.org/10.21123/bsj.2021.18.2(suppl.).1001.

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This study focused on spectral clustering (SC) and three-constraint affinity matrix spectral clustering (3CAM-SC) to determine the number of clusters and the membership of the clusters of the COST 2100 channel model (C2CM) multipath dataset simultaneously. Various multipath clustering approaches solve only the number of clusters without taking into consideration the membership of clusters. The problem of giving only the number of clusters is that there is no assurance that the membership of the multipath clusters is accurate even though the number of clusters is correct. SC and 3CAM-SC aimed t
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Sun, Junchang, Shuai Ma, Hui Zhou, Chun Du, and Shiyin Li. "Measurement and Statistical Analysis of Distinguishable Multipaths in Underground Tunnels." International Journal of Antennas and Propagation 2020 (December 2, 2020): 1–11. http://dx.doi.org/10.1155/2020/2501832.

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Compared with the line-of-sight (LOS) condition, the multipath effect is more serious in the non-line-of-sight (NLOS) condition. Therefore, the LOS and NLOS identification is necessary for the multipath analysis of signal propagation. The commonly used method is the support vector machine (SVM) method with high computational complexity. To tackle this problem, this paper adopts the SVM classifier based on fewer selected features of the normalized power delay profile (PDP). Therein, the PDP can be obtained using the sliding correlation method. The results show that the SVM-based classifier can
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Hunegnaw, Addisu, and Felix Norman Teferle. "Evaluation of the Multipath Environment Using Electromagnetic-Absorbing Materials at Continuous GNSS Stations." Sensors 22, no. 9 (2022): 3384. http://dx.doi.org/10.3390/s22093384.

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To date, no universal modelling technique is available to mitigate the effect of site-specific multipaths in high-precision global navigation satellite system (GNSS) data processing. Multipaths affect both carrier-phase and code/pseudorange measurements, and the errors can propagate and cause position biases. This paper presents the use of an Eccosorb AN-W-79 microwave-absorbing material mounted around a GNSS antenna that reflects less than −17 dB of normal incident energy above a frequency of 600 MHz. To verify the feasibility and effectiveness of the Eccosorb, we installed two close stations
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Al Mtawa, Yaser. "Enhancing Network Availability: An Optimization Approach." Computation 11, no. 10 (2023): 202. http://dx.doi.org/10.3390/computation11100202.

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High availability is vital for network operators to ensure reliable services. Network faults can disrupt functionality and require quick recovery. Multipath networking enhances availability through load balancing and optimal link utilization. However, equal-cost multipath (ECMP) routing has limitations in effectively using multipaths, decreasing network availability. This paper proposes a three-phase disjoint-path framework that improves availability by directing traffic flows through separate paths. The framework provides effective load balancing and meets various service requirements. It inc
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Scherrer, Stephen R., Brendan P. Rideout, Giacomo Giorli, Eva-Marie Nosal, and Kevin C. Weng. "Depth- and range-dependent variation in the performance of aquatic telemetry systems: understanding and predicting the susceptibility of acoustic tag–receiver pairs to close proximity detection interference." PeerJ 6 (January 12, 2018): e4249. http://dx.doi.org/10.7717/peerj.4249.

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Background Passive acoustic telemetry using coded transmitter tags and stationary receivers is a popular method for tracking movements of aquatic animals. Understanding the performance of these systems is important in array design and in analysis. Close proximity detection interference (CPDI) is a condition where receivers fail to reliably detect tag transmissions. CPDI generally occurs when the tag and receiver are near one another in acoustically reverberant settings. Here we confirm transmission multipaths reflected off the environment arriving at a receiver with sufficient delay relative t
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Materum, Lawrence, and Antipas T. Teologo Jr. "An Improved K-Power Means Technique Using Minkowski Distance Metric and Dimension Weights for Clustering Wireless Multipaths in Indoor Channel Scenarios." Journal of Information and Communication Technology 20, No.4 (2021): 541–63. http://dx.doi.org/10.32890/jict2021.20.4.4.

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Wireless multipath clustering is an important area in channel modeling, and an accurate channel model can lead to a reliable wireless environment. Finding the best technique in clustering wireless multipath is still challenging due to the radio channels’ time-variant characteristics. Several clustering techniques have been developed that offer an improved performance but only consider one or two parameters of the multipath components. This study improved the K-PowerMeans technique by incorporating weights or loads based on the principal component analysis and utilizing the Minkowski distance m
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Dissertations / Theses on the topic "Multipaths"

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Zhao, Xia. "Transmission scheduling for routing paths and multipaths in cognitive radio mesh networks." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/zhao/ZhaoX0510.pdf.

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Nodes in a cognitive radio mesh network may select from a set of available channels to use provided they do not interfere with primary users. This ability can improve overall network performance but introduces the question of how best to use these channels. This project addresses the following specific problem: given a routing path P, choose which channels each link in P should use and their transmission schedule so as to maximize the end-to-end data flow rate (throughput) supported by the entire path. This problem is relevant to applications such as streaming video or data where a connection
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Al-Shabibi, Ali [Verfasser], and Volker [Akademischer Betreuer] Lindenstruth. "MultiPaths Revisited - A novel approach using OpenFlow-enabled devices / Ali Al-Shabibi ; Betreuer: Volker Lindenstruth." Heidelberg : Universitätsbibliothek Heidelberg, 2011. http://d-nb.info/1179228723/34.

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Ribaud, Florian. "Analysis of Multipath Channel Reduction Models for the Testing of Realistic GNSS Receivers." Phd thesis, Toulouse, INPT, 2016. http://oatao.univ-toulouse.fr/17680/1/Ribaud_Florian.pdf.

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This PhD work relates the development of multipath channel reduction methods, putting the emphasis on the preservation of the signal tracking performances of satellite navigation systems. It aims at adapting the land mobile channel models to the realistic testing of GNSS receivers, by reducing drastically the number of multipaths of the original channel model (from thousands to less than 10 typically) all by conserving the pseudo-range error. Three types of methods have been investigated in order to cover all different possibilities of reduction processes. As a first approach, a multipath aggr
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Bourdeau, Aude. "Approches avancées de navigation par signaux GNSS en environnement urbain utilisant un modèle 3D." Thesis, Toulouse, ISAE, 2013. http://www.theses.fr/2013ESAE0040/document.

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L'utilisation de systèmes GNSS (Global Navigation Satellites System) en environnement urbain s'est fortement développée, notamment avec l'apparition des puces GNSS dans les téléphones portables. Cependant, l'environnement urbain génère des difficultés dans la réception des signaux GNSS qui peuvent engendrer des erreurs en position de plusieurs dizaines de mètres. Nous avons choisi d'apporter une solution à ces problématiques grâce à l'utilisation d'un modèle 3D de ville réaliste simulant la propagation des signaux GNSS. La première partie de notre étude se porte sur la problématique des signau
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Maceraudi, Jimmy. "Algorithmes de radiolocalisation et traitements adaptés à une architecture de récepteur IR-UWB intégrée." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S106/document.

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En autorisant de nouveaux services centrés sur l'utilisateur (navigation indoor contextuelle, surveillance/inventaire de biens personnels, etc.), les nouvelles fonctions de radiolocalisation sont en passe de modifier en profondeur les usages liés à la mobilité. Dans ce contexte, la technologie radio ultra large bande impulsionnelle (IR-UWB), qui permet en théorie d'apprécier le temps de vol des impulsions transmises à l'échelle de la nanoseconde et donc, la distance séparant l'émetteur du récepteur avec une précision de l'ordre de quelques dizaines de centimètres seulement, a été régulièrement
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Gonzalez, Thomas. "Estimation des paramètres de multitrajets pour des signaux GNSS par apprentissage profond et application en environnement de simulation 3D." Electronic Thesis or Diss., Université de Toulouse (2023-....), 2024. http://www.theses.fr/2024TLSES059.

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Le système de réception de signaux Global Navigation Satellite System (GNSS) présente une vulnérabilité face au phénomène de multitrajet. Événement fréquent en milieu urbain, il peut mener à une forte détérioration des performances de positionnement du récepteur. Malgré le développement de nombreuses techniques à des fins de détection ou de réduction de ses effets comme le Fast Iterative Maximum-Likelihood Algorithm (FIMLA) ou les filtres particulaires, la diminution de l'impact du multitrajet au sein d'un récepteur GNSS reste un objectif difficile à atteindre. Dans cette thèse, nous nous prop
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Giacometti, Romain. "Détection et localisation des signaux radar (systèmes passifs ou discrets)." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0083.

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L’objectif de cette thèse est de développer de nouvelles solutions pour détecter et localiser des sources électromagnétiques radar au niveau d'une unique station de réception en exploitant les signaux directs et indirects reçus. Dans le cadre de notre étude, nous avons dans un premier temps développé une modélisation du signal reçu au niveau d'un récepteur en tenant compte des caractéristiques des émetteurs et de la zone environnante. L'évaluation de cette modélisation a été effectuée en s'appuyant sur un cas particulier de détection et de localisation des réflecteurs. Ce dernier, traité dans
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Purushothama, Rashmi. "MULTIPATH COMMUNICATIONS USING NAMES." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-90235.

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Increased host mobility, and multi-homing make IP address management very complex in applications. Due to host mobility, the IP address of a host may change dynamically, and also frequently. Multi-homing leads to multiple IP addresses for a single host. Name-based socket is a solution to address the complex IP address management. It relieves the applications from the overhead, and moves it to the operating system. It uses a constant name, instead of an IP address to establish a connection, thus allowing for the IP address changes during the course of the connection. The current implementation
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Suwansantisuk, Watcharapan 1978. "Multipath aided rapid acquisition." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/16697.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.<br>Includes bibliographical references (p. 123-125).<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Spread-spectrum systems with large transmission bandwidth present significant challenges from the standpoint of achieving synchronization before communication commences. This research investigates a rapid acquisition procedure that exploits the multipath to aid the synchronizatio
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Squarcialupi, Riccardo. "Il Protocollo MultiPath TCP." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24311/.

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Ad oggi, il Transmission Control Protocol (TCP) è il protocollo più popolare per trasmettere e consegnare informazioni su Internet in modo affidabile. Tuttavia, esso fa uso di una connessione a percorso singolo, non sfruttando il multihoming e i percorsi multipli che sono sempre più disponibili per i dispositivi endpoint, cioè dispositivi mobili e server in configurazioni ad alta resilienza. Il MultiPath TCP (MPTCP) è stato sviluppato per affrontare queste limitazioni. Esso, infatti, mira a fare uso della diversità dei percorsi, al fine di offrire una migliore connettività di rete complessiv
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Books on the topic "Multipaths"

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Center, Langley Research, ed. Multipath analysis diffraction calculations. National Aeronautics and Space Administration, Langley Research Center, 1996.

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North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Multiple mechanism propagation paths (MMPPs): their characterisation and influence on system design. AGARD, 1994.

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Kovalyov, Igor P. SDMA for Multipath Wireless Channels. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18863-3.

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S, Watts, ed. Radar clutter and multipath propagation. The Institute of Electrical Engineers, 1991.

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Ruprecht, Jürg. Maximum-likelihood estimation of multipath channel. Hartung-Gorre, 1989.

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Gal, Avner. Passive range estimation using over sea multipath. Naval Postgraduate School, 1988.

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Djukic, Petar. Optimum resource allocation in multipath ad hoc networks. National Library of Canada, 2003.

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Zhou, Dizhi, and Wei Song. Multipath TCP for User Cooperation in Wireless Networks. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11701-0.

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Feder, Meir. Multipath time-delay estimation via the EM algorithm. Woods Hole Oceanographic Institution, 1987.

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Mämmelä, Aarne. Diversity receivers in a fast fading multipath channel. Technical Research Centre of Finland, 1995.

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Book chapters on the topic "Multipaths"

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Menth, Michael, Andreas Reifert, and Jens Milbrandt. "Self-Protecting Multipaths – A Simple and Resource-Efficient Protection Switching Mechanism for MPLS Networks." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-24693-0_44.

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Braasch, Michael S. "Multipath." In Springer Handbook of Global Navigation Satellite Systems. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-42928-1_15.

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Weik, Martin H. "multipath." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_11928.

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Faruque, Saleh. "Multipath Propagation." In Radio Frequency Propagation Made Easy. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11394-4_3.

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Gavoille, Cyril, Quentin Godfroy, and Laurent Viennot. "Multipath Spanners." In Structural Information and Communication Complexity. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13284-1_17.

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Weik, Martin H. "multipath fading." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_11929.

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Turchin, Peter. "Multipath Forecasting." In How Worlds Collapse. Routledge, 2023. http://dx.doi.org/10.4324/9781003331384-25.

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Kovalyov, Igor P. "Introduction." In SDMA for Multipath Wireless Channels. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18863-3_1.

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Kovalyov, Igor P. "Limit Capacity and Statistical Models of Wireless Channels." In SDMA for Multipath Wireless Channels. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18863-3_2.

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Kovalyov, Igor P. "Capacity of Multiple Input Multiple Output Communication Systems." In SDMA for Multipath Wireless Channels. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18863-3_3.

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Conference papers on the topic "Multipaths"

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Lyu, Zhidong, Lu Zhang, Mingzheng Lei, et al. "Photonic THz Sensing-assisted Multipath Channel Estimation for ISAC." In Optical Fiber Communication Conference. Optica Publishing Group, 2025. https://doi.org/10.1364/ofc.2025.th2a.23.

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We present a sensing-assisted multipath channel estimation method for photonic terahertz integrated sensing and communication systems, achieving ~8 dB compensation gain in a 20 Gbps over 20 m multipath 124 GHz wireless communication link.
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Siow, Natasha, Evan Sutcliffe, and Alejandra Beghelli. "The Performance-Cost Trade-Off of Multipath Multipartite Entanglement Distribution." In Quantum 2.0. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/quantum.2024.qth3a.19.

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High rates for multipath multipartite entanglement distribution require more repeaters than single-path. We show that prioritising high-usage repeaters enables multipath protocols to still significantly outperform single-path with just 2.8× repeaters instead of 6×.
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Lam, Hahn, Evan Sutcliffe, and Alejandra Beghelli. "Impact of Noise on Multipartite Entanglement Distribution in Quantum Networks." In Quantum 2.0. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/quantum.2024.qth3a.35.

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We examine non-ideal entanglement swapping and fusion operations in single-path and multipath routing for multipartite entanglement distribution. Results show the distance-invariant multipartite distribution rate of multipath routing is lost in the presence of noise.
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Sivan, Amir, and Meir Orenstein. "Adding Photon Entanglement and Quantum Beating to Superradiance by Using Multilevel Atoms." In CLEO: Fundamental Science. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_fs.2024.fw4j.6.

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Entanglement is added to the multiphoton state emanated by superradiance. It is achieved by employing multilevel atoms, via a multipath Dicke ladder. Additional quantum effects like beating between collective states are exhibited.
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Aparecido, Romulo, Jiaqian Yang, John D. Downie, et al. "Experimental Demonstration of MPI-Penalty-Free S-band Transmission over G.654.E Fibres." In Optical Fiber Communication Conference. Optica Publishing Group, 2025. https://doi.org/10.1364/ofc.2025.w4e.4.

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We demonstrate multipath interference-penalty-free S-band transmission over two G.654.E-compliant fibres with cable cutoff up to 1530 nm. No SNR degradation was observed across various transmission distances and baud rates.
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Cancela, Luís G., and João O. Pires. "MPI Impact in C+L+S Multiband Transmission Reach." In Photonic Networks and Devices. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/networks.2024.netu2c.4.

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Multipath interference (MPI) impact is assessed in a C+L+S multiband transmission scenario. For a typical -34 dB/span MPI, transmission reach in the L-band suffers a 20% reach penalty considering the QPSK modulation format.
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Li, Zijian, Chen Ding, Qiarong Xiao, Zixian Wei, Chaoran Huang, and Chester Shu. "Multipoint-to-Point All-Optical Channel Aggregation for Coherent Passive Optical Network Using Talbot-Based Processing and Power-Division Multiplexing." In Optical Fiber Communication Conference. Optica Publishing Group, 2025. https://doi.org/10.1364/ofc.2025.th1j.3.

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We propose a multipoint-to-point all-optical channel aggregation scheme using Talbot-based processing and power-division multiplexing, enhancing scalability of uplink traffic in a coherent passive optical network through superposition of multipath signals at the power-domain physical layer.
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Mekhael, Madona, Timo Stolt, Anna Vesala, et al. "Phase-Matched Second-Harmonic Generation from Metasurfaces Inside Multipass Cells." In CLEO: Science and Innovations. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_si.2024.sth3p.4.

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We demonstrate scalable enhancement of second-harmonic generation (SHG) of metasurfaces through multipass cells. We achieve phase matching with superlinear dependence on the number of passes, promising applications in diverse nonlinear optics.
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Liu, Junjie, and Roch Guerin. "Multipaths and Rate Stability." In GLOBECOM 2016 - 2016 IEEE Global Communications Conference. IEEE, 2016. http://dx.doi.org/10.1109/glocom.2016.7842013.

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Lichun Li, Chongsen Ran, and Feng Wei. "Number of multipaths estimation by unitary transformation." In 2004 International Conference on Communications, Circuits and Systems. IEEE, 2004. http://dx.doi.org/10.1109/icccas.2004.1345959.

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Reports on the topic "Multipaths"

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Grimmell, W. C. Computing Path Tables for Quickest Multipaths In Computer Networks. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/885861.

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Smith, Kevin B. Bottom Reverberation Data Analysis and Propagation Modeling of Complex Multipaths. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada628993.

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Shpiner, A., R. Tse, C. Schelp, and T. Mizrahi. Multipath Time Synchronization. RFC Editor, 2016. http://dx.doi.org/10.17487/rfc8039.

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Rusjan, Edmond. Eigenvector Analysis for Multipath. Defense Technical Information Center, 2007. http://dx.doi.org/10.21236/ada468948.

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Cheney, Margaret. Imaging That Exploits Multipath Scattering. Defense Technical Information Center, 2005. http://dx.doi.org/10.21236/ada437819.

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Newman, Harvey B., Artur Barczyk, and Michael Bredel. OLiMPS. OpenFlow Link-layer MultiPath Switching. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1163919.

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Ford, A., C. Raiciu, M. Handley, S. Barre, and J. Iyengar. Architectural Guidelines for Multipath TCP Development. RFC Editor, 2011. http://dx.doi.org/10.17487/rfc6182.

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Scharf, M., and A. Ford. Multipath TCP (MPTCP) Application Interface Considerations. RFC Editor, 2013. http://dx.doi.org/10.17487/rfc6897.

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Seite, P., A. Yegin, and S. Gundavelli. Mobile Access Gateway (MAG) Multipath Options. RFC Editor, 2018. http://dx.doi.org/10.17487/rfc8278.

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Raiciu, C., M. Handley, and D. Wischik. Coupled Congestion Control for Multipath Transport Protocols. RFC Editor, 2011. http://dx.doi.org/10.17487/rfc6356.

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