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为实现基于消息传递的迭代伪码快速捕获算法的多用户应用,对单用户迭代捕获算法进行了改进,提出了多用户联合初始信息进化和各用户多重迭代的捕获方案,给出了多用户迭代伪码捕获算法的流程,解决了多址干扰和噪声干扰给迭代捕获算法造成的困难.仿真结果表明,改进后的多用户迭代伪码捕获算法的估计序列误码率较改进前各单用户迭代伪码捕获算法有很大程度的降低,证明了该算法的有效性.
In order to realize the multi-user application of fast iterative pseudo-code based on message passing, this paper improves the single-user iterative acquisition algorithm and proposes a multi-user joint initial information evolution and multi-iterative user acquisition scheme. The multi-user iteration The procedure of the pseudo-code acquisition algorithm solves the difficulties caused by the multiple-access interference and the noise interference to the iterative acquisition algorithm.The simulation results show that the estimated bit error rate of the improved multi-user iterative pseudo-code acquisition algorithm is better than the single-user iteration Pseudo-code acquisition algorithm has been greatly reduced, and proved the effectiveness of the algorithm.