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The performance of coordinated multi-point (CoMP) transmission systems will be severely degraded by channel quantization error when each user employs limited number of bits to quantize and feed back its channel information. This is especially true for multi-user multi-antenna CoMP with joint processing (CoMP-JP), where multi-user interference becomes dominant for high power region. As an alternative...
This paper proposes a novel codebook for multiuser multiple-input multiple-output systems under spatially correlated channels. Existing codebooks designed for correlated channels either require accurate channel statistics which is not favorable for practical systems, or only perform well in highly correlated channels. In this paper, we first analyze the per-user rate loss led by using DFT codebook,...
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