基于克莱姆-施密特正交化法则的多用户检测器

Multi-User Detector Based on Gram-Schmidt Algorithm

提出了码分多址 (CDMA)系统中一种基于克莱姆 施密特正交化法则的多址干扰抑制算法 .不同于传统的多用户检测算法中采用扩频序列对接收信号进行解扩 ,该算法运用克莱姆 施密特准则递推地完成最优解扩码的求解 ,进而对接收信号进行解扩处理 ,可以实现对多址干扰的完全抑制 .性能分析和仿真结果均表明 ,该算法能有效地抑制CDMA系统中的多址干扰 ,改善系统的性能 .

A multiple access interference (MAI) cancellation algorithm employing Gram-Schmidt algorithm for code division multiple access (CDMA) systems is presented. Unlike the conventional multiuser detector where the spreading sequence is used to de-spread the multiuser signals, the new detector uses an optimal de-spreading sequence locally generated by Gram-Schmidt algorithm to de-spread the received signals, making the multiple access interference fully suppress. Analysis and simulation show that this algorithm can effectively cancel MAI and improve the bit error rate (BER) performance of the CDMA systems.