Distributed Expectation Propagation Detection for Cell-Free Massive MIMO

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.

arXiv comment6 pages, 5 figures, 2 tables, Accepted by IEEE Globecom 2021

References in corpus (4)

• Scalable Cell-Free Massive MIMO Systems
• Optimality Properties, Distributed Strategies, and Measurement-Based Evaluation of Coordinated Multicell OFDMA Transmission
• Bayesian Optimal Data Detector for Hybrid mmWave MIMO-OFDM Systems with Low-Resolution ADCs
• Decentralized Equalization with Feedforward Architectures for Massive MU-MIMO

Cited by in corpus (1)

• Cell-Free Massive MIMO Detection: A Distributed Expectation Propagation Approach