2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops)最新文献_第8页

Channel Estimation for RIS-aided mmWave Communications via 3D Positioning 基于三维定位的ris辅助毫米波通信信道估计

2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops) Pub Date : 2021-07-28 DOI: 10.1109/ICCCWorkshops52231.2021.9538860

Yaoshen Cui, Haifan Yin

{"title":"Channel Estimation for RIS-aided mmWave Communications via 3D Positioning","authors":"Yaoshen Cui, Haifan Yin","doi":"10.1109/ICCCWorkshops52231.2021.9538860","DOIUrl":"https://doi.org/10.1109/ICCCWorkshops52231.2021.9538860","url":null,"abstract":"Millimeter-wave (mmWave) communication is one of the key technologies for the fifth-generation cellular networks (5G). However, one of the fundamental problems of mmWave communication is the susceptibility to blockage effects. One way to alleviate this effect is the use of Reconfigurable Intelligent Surface (RIS). Nevertheless, due to the large number of passive reflecting elements on RIS, the channel estimation turns out to be a challenging task. This paper proposes a novel 3D localization technology to achieve the low-complexity channel estimation for RIS-aided mmWave communication system. Our idea consists of exploiting the sparsity of the mmWave channel and the topology of RIS itself. In particular, we propose the concept of reflecting unit set (RUS) and a coplanar maximum likelihood-based (CML) efficient 3D positioning method, and derive the corresponding Cramer-Rao Lower Bounds (CRLB) in close-form. Compared to state-of-the-art methods, our proposed method requires less time-frequency resource in channel acquisition. Large performance gains are confirmed in simulation, which proves the effectiveness of our proposed method.","PeriodicalId":335240,"journal":{"name":"2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133546828","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

Survey on Space-air-ground Integrated Networks in 6G 6G空间-地空一体化网络研究进展

2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops) Pub Date : 2021-07-28 DOI: 10.1109/ICCCWorkshops52231.2021.9538859

Heng Wang, Xu Xia, Tangyijia Song, Yanxia Xing

引用次数: 9

A Review of 3GPP Release 18 on Smart Energy and Infrastructure 3GPP第18版《智慧能源与基础设施》综述

2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops) Pub Date : 2021-07-28 DOI: 10.1109/ICCCWorkshops52231.2021.9538875

Xu Xia, Chengli Mei, Xiaodong Zhou, Sheng Wang, Heng Wang, Yanxia Xing

引用次数: 2

A Low-Complexity Approximate Message Passing Equalizer for OTFS system 一种用于OTFS系统的低复杂度近似消息传递均衡器

2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops) Pub Date : 2021-07-28 DOI: 10.1109/ICCCWorkshops52231.2021.9538883

Yang Zhang, Qunfei Zhang, Lingling Zhang, Chengbing He, Xinyuan Tian

{"title":"A Low-Complexity Approximate Message Passing Equalizer for OTFS system","authors":"Yang Zhang, Qunfei Zhang, Lingling Zhang, Chengbing He, Xinyuan Tian","doi":"10.1109/ICCCWorkshops52231.2021.9538883","DOIUrl":"https://doi.org/10.1109/ICCCWorkshops52231.2021.9538883","url":null,"abstract":"The orthogonal time frequency space (OTFS) modulation has emerged as a potential candidate modulation scheme for high mobility wireless communications. However, OTFS may experience significant inter-Doppler interference (IDI) and inter-symbol interference (ISI) occur in the receiver. To jointly combat both interferences, we propose an efficient improved approximate message passing (AMP) equalizer for OTFS transmission over delay-Doppler channels in this paper. Specifically, a decoupling operation can be performed for joint interference cancellation, and the sparse feature of equivalent channel matrix is utilized in delay-Doppler domain. Then, the posterior mean and variance estimates of the transmitted symbol is reconstructed by the denoising step. Furthermore, a threshold-based convergence scheme is proposed with the purpose of trade-off the computational complexity and performance of the OTFS system. Simulation results demonstrate that the proposed improved AMP equalizer exhibits a better bit error rate (BER) performance with a reduced complexity compared to its conventional counterparts.","PeriodicalId":335240,"journal":{"name":"2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"18 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128891522","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: 1

Input-Output Relation Analysis of OTFS modulation over Rapid Linear Time-Variant Channels 快速线性时变信道OTFS调制的输入输出关系分析

2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops) Pub Date : 2021-07-28 DOI: 10.1109/ICCCWorkshops52231.2021.9538868

Haoyan Liu, Min Yang, Yanming Liu, Qiongjie Zhang

引用次数: 0

Wireless Communication with Extremely Large-Scale Intelligent Reflecting Surface 超大规模智能反射面无线通信

2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops) Pub Date : 2021-06-11 DOI: 10.1109/ICCCWorkshops52231.2021.9538864

Chao Feng, Haiquan Lu, Yong Zeng, Shi Jin, Rui Zhang

{"title":"Wireless Communication with Extremely Large-Scale Intelligent Reflecting Surface","authors":"Chao Feng, Haiquan Lu, Yong Zeng, Shi Jin, Rui Zhang","doi":"10.1109/ICCCWorkshops52231.2021.9538864","DOIUrl":"https://doi.org/10.1109/ICCCWorkshops52231.2021.9538864","url":null,"abstract":"Intelligent reflecting surface (IRS) is a promising technology for wireless communications, thanks to its potential capability to engineer the radio environment. However, in practice, such an envisaged benefit is attainable only when the passive IRS is of a sufficiently large size, for which the conventional uniform plane wave (UPW)-based channel model may become inaccurate. In this paper, we pursue a new channel modelling and performance analysis for wireless communications with extremely large-scale IRS (XL-IRS). By taking into account the variations in signal’s amplitude and projected aperture across different reflecting elements, we derive both lower- and upper-bounds of the received signal-to-noise ratio (SNR) for the general uniform planar array (UPA)-based XL-IRS. Our results reveal that, instead of scaling quadratically with the increased number of reflecting elements M as in the conventional UPW model, the SNR under the more practically applicable non-UPW model increases with M only with a diminishing return and gets saturated eventually. To gain more insights, we further study the special case of uniform linear array (ULA)-based XL-IRS, for which a closed-form SNR expression in terms of the IRS size and transmitter/receiver location is derived. This result shows that the SNR mainly depends on the two geometric angles formed by the transmitter/receiver locations with the IRS, as well as the boundary points of the IRS. Numerical results validate our analysis and demonstrate the importance of proper channel modelling for wireless communications aided by XL-IRS.","PeriodicalId":335240,"journal":{"name":"2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114760697","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: 17

Cell-Free Symbiotic Radio: Channel Estimation Method and Achievable Rate Analysis 无细胞共生无线电:信道估计方法和可达速率分析

2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops) Pub Date : 2021-06-11 DOI: 10.1109/ICCCWorkshops52231.2021.9538923

Zhuoyin Dai, Ruoguang Li, Jingran Xu, Yong Zeng, Shi Jin

{"title":"Cell-Free Symbiotic Radio: Channel Estimation Method and Achievable Rate Analysis","authors":"Zhuoyin Dai, Ruoguang Li, Jingran Xu, Yong Zeng, Shi Jin","doi":"10.1109/ICCCWorkshops52231.2021.9538923","DOIUrl":"https://doi.org/10.1109/ICCCWorkshops52231.2021.9538923","url":null,"abstract":"Cell-free massive MIMO and symbiotic radio are promising beyond 5G(B5G) networking architecture and transmission technology, respectively. This paper studies cell-free symbiotic radio systems, where a number of distributed access points (APs) cooperatively send primary information to a receiver, and simultaneously support the backscattering communication of the secondary backscatter device (BD). An efficient two-phase uplink-training based channel estimation method is proposed to estimate the direct-link channel and cascaded backscatter channel, and the achievable primary and secondary communication rates taking into account the channel estimation errors are derived. Furthermore, to achieve a flexible trade-off between the primary and secondary communication rates, we propose a low-complexity weighted-maximal-ratio transmission (weighted-MRT) beamforming scheme, which only requires local processing at each AP without having to exchange the estimated channel state information. Simulation results are provided to show the impact of the channel training lengths on the performance of the cell-free symbiotic radio systems.","PeriodicalId":335240,"journal":{"name":"2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127490544","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: 10

Rate Splitting Multiple Access for Joint Communication and Sensing Systems with Unmanned Aerial Vehicles 无人机联合通信与传感系统的分频多址

2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops) Pub Date : 2020-11-14 DOI: 10.1109/ICCCWorkshops52231.2021.9538915

Yuwei Li, Wanli Ni, Hui Tian, Meihui Hua, Shaoshuai Fan

{"title":"Rate Splitting Multiple Access for Joint Communication and Sensing Systems with Unmanned Aerial Vehicles","authors":"Yuwei Li, Wanli Ni, Hui Tian, Meihui Hua, Shaoshuai Fan","doi":"10.1109/ICCCWorkshops52231.2021.9538915","DOIUrl":"https://doi.org/10.1109/ICCCWorkshops52231.2021.9538915","url":null,"abstract":"This paper investigates the problem of resource allocation for joint communication and radar sensing system on rate-splitting multiple access (RSMA) based unmanned aerial vehicle (UAV) system. UAV simultaneously communicates with multiple users and probes signals to targets of interest to exploit cooperative sensing ability and achieve substantial gains in size, cost and power consumption. By virtue of using linearly precoded rate splitting at the transmitter and successive interference cancellation at the receivers, RSMA is introduced as a promising paradigm to manage interference as well as enhance spectrum and energy efficiency. To maximize the energy efficiency of UAV networks, the deployment location and the beamforming matrix are jointly optimized under the constraints of power budget, transmission rate and approximation error. To solve the formulated non-convex problem efficiently, we decompose it into the UAV deployment subproblem and the beamforming optimization subproblem. Then, we invoke the successive convex approximation and difference-of-convex programming as well as Dinkelbach methods to transform the intractable subproblems into convex ones at each iteration. Next, an alternating algorithm is designed to solve the non-linear and non-convex problem in an efficient manner, while the corresponding complexity is analyzed as well. Finally, simulation results reveal that proposed algorithm with RSMA is superior to orthogonal multiple access and power-domain non-orthogonal multiple access in terms of power consumption and energy efficiency.","PeriodicalId":335240,"journal":{"name":"2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126103818","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