| Influenced by Multipath fading and Doppler shifting, a mobile radio channel is non_stationary and there are very strong time-variant characteristics with it. A general modulation method can not be used for high bit-error ratio (BER). The implementation of signal detection method must be done in a mobile communicaiton system. Based on this, multiuser detection technologies are emphatically discussed in this paper. Some of cancellation algorithm implementations are described in details and simulated with Matlab tools. Their performances are compared at last.In chapter 1, the background is discussed.In chapter 2, the third air interface is discussed.In chapter 3, some multi-user detection algorithm.In chapter 4, using matlab, realize algorithm and analyze conclusion. |
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