In this paper, the joint estimation of frequency offsets and channel for distributed MIMO system in time-varying channel is discussed. We assume that each pair of transmit and receive antennas has a different frequency offset. We promote the multi-parameter estimation based on expectation conditional maximization (ECM) and space-alternating generalized expectation-maximization (SAGE) for a MIMO system operating under a flat-fading environment to the multi-parameter estimation using EM algorithm for distributed MIMO systems in time-varying channel. Theoretical analysis and simulation results indicate that the improvement can well compensate for the performance loss caused by time-variability and achieve good performance for time-varying distributed MIMO systems
Digital Object Identifier (DOI)
Song, Lijun; Kong, Zhaofu; Luo, Yang; Li, Yinze; Chen, Xiao; and Lei, Xia
"Joint Frequency Offset and Channel Estimation for Distributed MIMO in Time-Varying Channels,"
Applied Mathematics & Information Sciences: Vol. 08:
6, Article 59.
Available at: https://digitalcommons.aaru.edu.jo/amis/vol08/iss6/59