Year
Month
(Preprint) Distributed Expectation Propagation Detection for Cell-Free Massive MIMO
Hengtao He 何恒涛 ¹, Hanqing Wang ², Xianghao Yu 喻翔昊 ¹, Jun Zhang 张军 ³, S.H. Song 宋勝輝 ¹, Khaled B. Letaief ¹
¹ Department of ECE, The Hong Kong University of Science and Technology, Kowloon, Hong Kong
香港 九龙 香港科技大学 电子与计算机工程系
² Huawei Technologies Company Ltd. Shanghai 201206, China
中国 上海 华为技术有限公司
³ Department of EIE, The Hong Kong Polytechnic University, Hong Kong
香港 香港理工大学 电子信息工程系
arXiv, 2021-08-17
Abstract

In cell-free massive MIMO networks, an efficient distributed detection algorithm is of significant importance. In this paper, we propose a distributed expectation propagation (EP) detector for cell-free massive MIMO. The detector is composed of two modules, a nonlinear module at the central processing unit (CPU) and a linear module at the access point (AP). The turbo principle in iterative decoding is utilized to compute and pass the extrinsic information between modules. An analytical framework is then provided to characterize the asymptotic performance of the proposed EP detector with a large number of antennas. Simulation results will show that the proposed method outperforms the distributed detectors in terms of bit-error-rate.
Distributed Expectation Propagation Detection for Cell-Free Massive MIMO_1
Distributed Expectation Propagation Detection for Cell-Free Massive MIMO_2
Distributed Expectation Propagation Detection for Cell-Free Massive MIMO_3
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