Analysis and Optimization of Massive Access to the IoT Relying on Multi-Pair Two-Way Massive MIMO Relay Systems

被引：11

作者：

Peng, Zhangjie ^{[1
,2
,3
]}

Chen, Xianzhe ^{[1
]}

Xu, Wei ^{[2
,4
]}

Pan, Cunhua ^{[5
]}

Wang, Li-Chun ^{[6
]}

Hanzo, Lajos ^{[7
]}

机构：

[1] Shanghai Normal Univ, Coll Informat Mech & Elect Engn, Shanghai 200234, Peoples R China

[2] South East Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Peoples R China

[3] Shanghai Normal Univ, Shanghai Engn Res Ctr Intelligent Educ &, Shanghai 200234, Peoples R China

[4] Zhengzhou Univ, Henan Joint Int Res Lab Intelligent Networking &, Zhengzhou 450001, Peoples R China

[5] Queen Mary Univ London, Sch Elect Engn & Comp Sci, London E1 4NS, England

[6] Natl Yang Ming Chiao Tung Univ, Dept Elect Comp Engn, Hsinchu 30010, Taiwan

[7] Univ Southampton, Sch Elect & Comp Sci, Southampton SO17 1BJ, Hants, England

来源：

IEEE TRANSACTIONS ON COMMUNICATIONS | 2021年 / 69卷 / 07期

基金：

英国工程与自然科学研究理事会; 中国国家自然科学基金; 上海市自然科学基金; 欧洲研究理事会;

关键词：

Massive access; Internet-of-Things (IoT); massive multiple-input multiple-output (MIMO); amplify-and-forward relay; two-way; beamforming; USER ACTIVITY DETECTION; CHANNEL ESTIMATION; CONNECTIVITY; CAPACITY; INTERNET; NETWORK; DESIGN;

D O I：

10.1109/TCOMM.2021.3072725

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We investigate massive access in the Internet-of-Things (IoT) relying on multi-pair two-way amplify-and-forward (AF) relay systems using massive multiple-input multiple-output (MIMO). We utilize the approximate message passing (AMP) algorithm for joint device activity detection and channel estimation. Furthermore, we analyze the achievable rates for multiple pairs of active devices and derive the closed-form expressions for both maximum-ratio combining/maximum-ratio transmission (MRC/MRT) and zero-forcing reception/zero-forcing transmission (ZFR/ZFT)-based beamforming schemes adopted at the relay. Moreover, to improve the achievable sum rates, we propose a low-complexity algorithm for optimizing the pilot length L. Our simulation results verify the accuracy of the closed-form expressions of the MRC/MRT and ZFR/ZFT scenarios. Finally, the proposed pilot-length optimization algorithm performs well in both the MRC/MRT and ZFR/ZFT scenarios.

引用

页码：4585 / 4598

页数：14

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