TY - JOUR
T1 - Compressed Channel Estimation for IRS-Assisted Millimeter Wave OFDM Systems
T2 - A Low-Rank Tensor Decomposition-Based Approach
AU - Zheng, Xi
AU - Wang, Peilan
AU - Fang, Jun
AU - Li, Hongbin
N1 - Publisher Copyright:
© 2012 IEEE.
PY - 2022/6/1
Y1 - 2022/6/1
N2 - We consider the problem of downlink channel estimation for intelligent reflecting surface (IRS)-assisted millimeter Wave (mmWave) orthogonal frequency division multiplexing (OFDM) systems. By exploring the inherent sparse scattering characteristics of mmWave channels, we show that the received signals can be expressed as a low-rank third-order tensor that admits a tensor rank decomposition, also known as canonical polyadic decomposition (CPD). A structured CPD-based method is then developed to estimate the channel parameters. Our analysis reveals that the training overhead required by our proposed method is as low as O(U2) , where U denotes the sparsity of the cascade channel. Simulation results are provided to illustrate the efficiency of the proposed method.
AB - We consider the problem of downlink channel estimation for intelligent reflecting surface (IRS)-assisted millimeter Wave (mmWave) orthogonal frequency division multiplexing (OFDM) systems. By exploring the inherent sparse scattering characteristics of mmWave channels, we show that the received signals can be expressed as a low-rank third-order tensor that admits a tensor rank decomposition, also known as canonical polyadic decomposition (CPD). A structured CPD-based method is then developed to estimate the channel parameters. Our analysis reveals that the training overhead required by our proposed method is as low as O(U2) , where U denotes the sparsity of the cascade channel. Simulation results are provided to illustrate the efficiency of the proposed method.
KW - Intelligent reflecting surface
KW - channel estimation
KW - millimeter wave communications
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U2 - 10.1109/LWC.2022.3163661
DO - 10.1109/LWC.2022.3163661
M3 - Article
AN - SCOPUS:85127498249
SN - 2162-2337
VL - 11
SP - 1258
EP - 1262
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 6
ER -