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在直序扩频码分多址 (DS -CDMA)系统中 ,多址干扰 (MAI)极大地制约系统容量及性能 .为了消除多址干扰 ,已提出了许多的多用户检测算法 .对极有应用潜力的算法———并行干扰对消在AWGN信道下的收敛性进行了分析 .通过理论分析 ,得到了一些有益的结论 .在同步两用户情况下 ,该算法收敛速度受制于对消系数及码间的相关性 .在硬判决条件下 ,还与用户的信噪比有关 .多用户的情况由于理论分析极其困难而没有进行 .所得结果对于该算法的应用有一定的启示 .
In Direct Sequence Spread Spectrum Code Division Multiple Access (DS-CDMA) systems, multiple access interference (MAI) greatly restricts system capacity and performance.In order to eliminate multiple access interference, many multiuser detection algorithms have been proposed The application of the potential algorithm --- parallel interference cancellation in the AWGN channel convergence has been analyzed by theoretical analysis, and some useful conclusions have been obtained.In the case of simultaneous two-user, the convergence speed of the algorithm is subject to the cancellation coefficient and The correlation between codes is also related to the signal-noise ratio of users under the condition of hard decision.The situation of multi-user is not carried out due to the extremely difficult of theoretical analysis.The obtained results have some enlightenment for the application of this algorithm.