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Joint Frequency Offset and Channel Estimation for Distributed MIMO in Time-Varying Channels |
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PP: 3175-3182 |
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Author(s) |
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Lijun Song,
Zhaofu Kong,
Yang Luo,
Yinze Li,
Xiao Chen,
Xia Lei,
Maozhu Jin,
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Abstract |
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| 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 |
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