A Simplified MMSE Equalizer for Distributed TR-STBC Systems with Multiple CFOs


In distributed wireless systems, the ancient carrier frequency offset (CFO) compensation ways might not be applied thanks to the existence of multiple CFOs. In this paper, we tend to address the equalization issue for distributed time-reversal house-time block coded (TR-STBC) systems when multiple CFOs are presented. A simplified minimum mean-sq. error (MMSE) equalizer is proposed, that exploits the nearly-banded structure of the channel matrices and utilizes the LDL^H factorization to reduce the computational complexity. Simulation results show that the proposed equalizer can achieve the similar performance because the traditional MMSE equalizer while possessing a lot of less complexity.

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