| Summary: | The new multiple access technology plays a very important role in 5G mobile communication system. In this article, a new non-orthogonal complex space division multiple(CSDM) technique is proposed and combined with traditional multiple input multiple output(MIMO) system to form CSDM-MIMO system. The CSDM-MIMO system can transmit multiple user data on one antenna at the same time and same frequency, which improves the data transmission rate and system capacity. The system special virtual channel is estimated by least squares(LS) algorithm and minimum mean square error(MMSE) algorithm respectively. At the same time, the optimal weight of the system is searched by the bit error rate(BER) fed back by the receiver and artificial fish swarm algorithm(AFSA).
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