Abstract
Considering the channel estimation of a multi-hop cooperation virtual multiple input multiple output (V-MIMO) system, we research and analyze the destructive effect of a multi-hop concatenate channel and energy leakage on channel sparseness. The decode-and-forward (DF) cooperation method can avoid estimation error accumulation of concatenate channel estimation. Moreover, the optimized orthogonal matrix with a genetic algorithm (GA) can enhance channel sparsity. This led us to propose a channel-estimation algorithm utilizing GA to optimize the orthogonal matrix of the multi-hop cooperation V-MIMO system based on a DF protocol. The simulation results show that, compared with the amplify-and-forward (AF) method, the proposed algorithm can improve the channel estimation accuracy and reduce the bit error rate of the multi-hop cooperation V-MIMO system.
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