2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC)最新文献_第8页

Understanding the RIS efficiency: from partial to full illumination 了解RIS效率:从部分照明到全照明

2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC) Pub Date : 2022-07-04 DOI: 10.1109/spawc51304.2022.9834003

Giorgos Stratidakis, S. Droulias, A. Alexiou

{"title":"Understanding the RIS efficiency: from partial to full illumination","authors":"Giorgos Stratidakis, S. Droulias, A. Alexiou","doi":"10.1109/spawc51304.2022.9834003","DOIUrl":"https://doi.org/10.1109/spawc51304.2022.9834003","url":null,"abstract":"Reconfigurable intelligent surfaces (RISs) are an attractive alternative to relays in high frequency wireless communications, as they can steer the beam towards the desired direction with low power requirements and without noise amplification. For successful incorporation in future wireless networks it is necessary to understand their efficiency, which depends on several parameters, such as the RIS distance and orientation relative to the transmitter and receiver, and size relative to the incident beam extent. In this work the efficiency of the RIS is studied in terms of the received power. Through simulations it is demonstrated how the RIS efficiency depends on the orientation of the RIS with respect to the transmitter and receiver, and also on the relative size of the RIS with respect to the footprint of the incident beam. The findings are quantified via a metric that expresses the percentage of the region within which a minimum received power is guaranteed, thus serving as a practical means for assessing the RIS efficiency particularly in mobile user environments.","PeriodicalId":423807,"journal":{"name":"2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125865723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Secure Multi-Antenna Coded Caching 安全多天线编码缓存

2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC) Pub Date : 2022-07-04 DOI: 10.1109/spawc51304.2022.9833934

Mohammad Javad Sojdeh, Mohammad Mahmoudi, Mehdi Letafati, S. P. Shariatpanahi, B. Khalaj

引用次数: 2

Wireless Channel Prediction in Partially Observed Environments 部分观测环境下的无线信道预测

2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC) Pub Date : 2022-07-03 DOI: 10.48550/arXiv.2207.00934

Mingsheng Yin, Yaqi Hu, Tommy Azzino, Seongjoon Kang, M. Mezzavilla, S. Rangan

{"title":"Wireless Channel Prediction in Partially Observed Environments","authors":"Mingsheng Yin, Yaqi Hu, Tommy Azzino, Seongjoon Kang, M. Mezzavilla, S. Rangan","doi":"10.48550/arXiv.2207.00934","DOIUrl":"https://doi.org/10.48550/arXiv.2207.00934","url":null,"abstract":"Site-specific radio frequency (RF) propagation pre-diction increasingly relies on models built from visual data such as cameras and LIDAR sensors. When operating in dynamic settings, the environment may only be partially observed. This paper introduces a method to extract statistical channel models, given partial observations of the surrounding environment. We propose a simple heuristic algorithm that performs ray tracing on the partial environment and then uses machine-learning trained predictors to estimate the channel and its uncertainty from features extracted from the partial ray tracing results. It is shown that the proposed method can interpolate between fully statistical models when no partial information is available and fully deterministic models when the environment is completely observed. The method can also capture the degree of uncertainty of the propagation predictions depending on the amount of region that has been explored. The methodology is demonstrated in a robotic navigation application simulated on a set of indoor maps with detailed models constructed using state-of-the-art navigation, simultaneous localization and mapping (SLAM), and computer vision methods.","PeriodicalId":423807,"journal":{"name":"2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC)","volume":"637 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131734528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intelligent Omni-Surfaces (IOSs) for the MIMO Broadcast Channel 面向MIMO广播信道的智能全曲面(IOSs)

2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC) Pub Date : 2022-06-27 DOI: 10.48550/arXiv.2206.13127

Abdel-rahman Mohamed, Nemanja Stefan Perovi'c, M. D. Renzo

引用次数: 1

An Optimization-Based User Scheduling Framework for mmWave Massive MU-MIMO Systems 基于优化的毫米波海量MU-MIMO系统用户调度框架

2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC) Pub Date : 2022-06-23 DOI: 10.48550/arXiv.2206.11658

V. Palhares, Christoph Studer

引用次数: 0

Improving Triplet-Based Channel Charting on Distributed Massive MIMO Measurements 分布式海量MIMO测量中基于三栅格信道制图的改进

2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC) Pub Date : 2022-06-20 DOI: 10.48550/arXiv.2206.09774

Florian Euchner, Phillip Stephan, Marc Gauger, Sebastian Dörner, S. Brink

引用次数: 6

Creating and Operating Areas With Reduced Electromagnetic Field Exposure Thanks to Reconfigurable Intelligent Surfaces 由于可重构的智能表面，创建和操作区域减少了电磁场暴露

2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC) Pub Date : 2022-06-14 DOI: 10.1109/spawc51304.2022.9833964

Dinh-Thuy Phan-Huy, Yohann Bénédic, Sebastien Herraiz Gonzalez, P. Ratajczak

{"title":"Creating and Operating Areas With Reduced Electromagnetic Field Exposure Thanks to Reconfigurable Intelligent Surfaces","authors":"Dinh-Thuy Phan-Huy, Yohann Bénédic, Sebastien Herraiz Gonzalez, P. Ratajczak","doi":"10.1109/spawc51304.2022.9833964","DOIUrl":"https://doi.org/10.1109/spawc51304.2022.9833964","url":null,"abstract":"Mobile network operators must provide a target quality of service (QoS) within a target coverage area. Each generation of networks from the 2nd to the 5th has reached higher QoS targets and coverage area sizes. However, the deployment of new networks is sometimes challenged by Electromagnetic Field (EMF) exposure constraints. In this paper, to take into account these constraints, we assess the novel and recent concept of \"Reduced EMF Exposure Area\". Such an area would be created and operated by a mobile network operator upon the request of its customers. In such an area, customers keep enjoying high data rate internet access while getting a reduced EMF exposure. To ensure this EMF exposure reduction, we propose to deploy Reconfigurable Intelligent Surfaces (RIS) connected to the mobile network and exploit a joint RIS-M-MIMO uplink beamforming scheme. We use our ray-tracing-based simulation tool to visualize and characterize the Reduced EMF Exposure Area in a challenging environment in terms of propagation. Our simulations show that an operator can create and operate such an area under the condition that it carefully places the RIS in the environment.","PeriodicalId":423807,"journal":{"name":"2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132681946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Learning to Detect with Constant False Alarm Rate 学习恒虚警率检测

2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC) Pub Date : 2022-06-12 DOI: 10.48550/arXiv.2206.05747

Tzvi Diskin, Uri Okun, A. Wiesel

引用次数: 6

Multi-Dimensional Dual-Blind Deconvolution Approach Toward Joint Radar-Communications 联合雷达通信的多维双盲反褶积方法

2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC) Pub Date : 2022-06-10 DOI: 10.48550/arXiv.2206.05166

Roman Jacome, K. Mishra, Edwin Vargas, B. Sadler, H. Arguello

{"title":"Multi-Dimensional Dual-Blind Deconvolution Approach Toward Joint Radar-Communications","authors":"Roman Jacome, K. Mishra, Edwin Vargas, B. Sadler, H. Arguello","doi":"10.48550/arXiv.2206.05166","DOIUrl":"https://doi.org/10.48550/arXiv.2206.05166","url":null,"abstract":"We consider a joint multiple-antenna radar-communications system in a co-existence scenario. Contrary to conventional applications, wherein at least the radar waveform and communications channel are known or estimated a priori, we investigate the case when the channels and transmit signals of both systems are unknown. In radar applications, this problem arises in multistatic or passive systems, where transmit signal is not known. Similarly, highly dynamic vehicular or mobile communications may render prior estimates of wireless channel unhelpful. In particular, the radar signal reflected-off multiple targets is overlaid with the multi-carrier communications signal. In order to extract the unknown continuous-valued target parameters (range, Doppler velocity, and direction-of-arrival) and communications messages, we formulate the problem as a sparse dual-blind deconvolution and solve it using atomic norm minimization. Numerical experiments validate our proposed approach and show that precise estimation of continuous-valued channel parameters, radar waveform, and communications messages is possible up to scaling ambiguities.","PeriodicalId":423807,"journal":{"name":"2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134155336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Robust PCA for Subspace Estimation in User-Centric Cell-Free Wireless Networks 以用户为中心的无小区无线网络中子空间估计的鲁棒PCA

2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC) Pub Date : 2022-06-08 DOI: 10.48550/arXiv.2206.03801

Fabian Gottsch, Noboru Osawa, T. Ohseki, K. Yamazaki, G. Caire

{"title":"Robust PCA for Subspace Estimation in User-Centric Cell-Free Wireless Networks","authors":"Fabian Gottsch, Noboru Osawa, T. Ohseki, K. Yamazaki, G. Caire","doi":"10.48550/arXiv.2206.03801","DOIUrl":"https://doi.org/10.48550/arXiv.2206.03801","url":null,"abstract":"We consider a scalable user-centric cell-free massive MIMO network with distributed remote radio units (RUs), enabling macrodiversity and joint processing. Due to the limited uplink (UL) pilot dimension, multiuser interference in the UL pilot transmission phase makes channel estimation a non-trivial problem. We make use of two types of UL pilot signals, sounding reference signal (SRS) and demodulation reference signal (DMRS) pilots, for the estimation of the channel subspace and its instantaneous realization, respectively. The SRS pilots are transmitted over multiple time slots and resource blocks according to a Latin squares based hopping scheme, which aims at averaging out the interference of different SRS co-pilot users. We propose a robust principle component analysis approach for channel subspace estimation from the SRS signal samples, employed at the RUs for each associated user. The estimated subspace is further used at the RUs for DMRS pilot decontamination and instantaneous channel estimation. We provide numerical simulations to compare the system performance using our subspace and channel estimation scheme with the cases of ideal partial subspace/channel knowledge and pilot matching channel estimation. The results show that a system with a properly designed SRS pilot hopping scheme can closely approximate the performance of a genie-aided system.","PeriodicalId":423807,"journal":{"name":"2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130320459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0