Detection for OFDM-AF Relay Systems Under Gaussian Mixture Noise With Imperfect CSI

被引：5
作者：
Zhang, Jiachen [1 ]
Li, Feng [1 ]
Chen, Jiangtao [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Informat & Commun Engn, Xian 710049, Peoples R China
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2020年 / 69卷 / 05期
关键词：
Amplify-and-forward; channel imperfections; Gaussian mixture noise; OFDM; variational Bayesian inference; CHANNEL ESTIMATION; USER;
D O I：
10.1109/TVT.2020.2980140
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：
Signal detection for orthogonal frequency-division multiplexing (OFDM) amplify-and-forward (AF) relay systems, under imperfect channel state information (CSI), is studied. Also, different from the published works, non-Gaussian noise, which always exists in practical wireless communication systems, is investigated. In order to avoid underestimating the noise model, the optimization structure over the key parameters of Gaussian mixture noise, CSI and data is constructed. After that, a closed form solution in iterative manner is obtained using the theory of variational message passing (VMP) based on the factor graph. Simulation proves the effectiveness of the proposed approach.
引用
收藏
页码：5666 / 5671
页数：6
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