Compressed Channel Estimation for Intelligent Reflecting Surface-Assisted Millimeter Wave Systems

被引:372
作者
Wang, Peilan [1 ]
Fang, Jun [1 ]
Duan, Huiping [2 ]
Li, Hongbin [3 ]
机构
[1] Univ Elect Sci & Technol China, Natl Key Lab Sci & Technol Commun, Chengdu 611731, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Informat & Commun Engn, Chengdu 611731, Peoples R China
[3] Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA
基金
美国国家科学基金会;
关键词
Channel estimation; Sparse matrices; Training; Array signal processing; Receivers; Scattering; Surface waves; Intelligent reflecting surface; millimeter wave communications; channel estimation;
D O I
10.1109/LSP.2020.2998357
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
In this letter, we consider channel estimation for intelligent reflecting surface (IRS)-assisted millimeter wave (mmWave) systems, where an IRS is deployed to assist the data transmission from the base station (BS) to a user. It is shown that for the purpose of joint active and passive beamforming, the knowledge of a large-size cascade channel matrix needs to be acquired. To reduce the training overhead, the inherent sparsity in mmWave channels is exploited. By utilizing properties of Katri-Rao and Kronecker products, we find a sparse representation of the cascade channel and convert cascade channel estimation into a sparse signal recovery problem. Simulation results show that our proposed method can provide an accurate channel estimate and achieve a substantial training overhead reduction.
引用
收藏
页码:905 / 909
页数:5
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