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提出了一种新的抗多径多用户检测器，该检测器能有效地实现多径分集。为简化异步多用户检测，作者曾提出过一种新的异步直扩码分多址（ＤＳ－ＣＤＭＡ）系统，即无记忆ＤＳ－ＣＤＭＡ系统，并对该系统在单用户多径情况下的性能以及几种新的抗多径检测器（单用户）进行了研究。同时考虑了多径干扰和多址干扰的影响。利用同一用户的多径信号间的强相关特性，并进行简化，将在实现路径分集的同时抑制多址干扰的影响并降低运算复杂度。虽然简化会带来附加的干扰项，理论分析和计算机仿真都表明，该路径相关多用户检测器（ＰＣＭＵＤ）具有比传统的ＲＡＫＥ接收机好得多的抗多径多址干扰性能。另外，该检测器具有很小的复杂度，能很好地工作在总的路径数超过扩频增益时。
A new anti-multipath multi-user detector is proposed, which can effectively realize multipath diversity. In order to simplify asynchronous multi-user detection, the author has proposed a new DS-CDMA system, that is memoryless DS-CDMA system. The performance of this system under single-user multi-path As well as several new anti-multipath detectors (single-user). The effects of multipath interference and multiple access interference are also considered. Utilizing the strong correlation between multipath signals of the same user and simplifying it, the path diversity will be achieved while suppressing the impact of multiple access interference and reducing the computational complexity. Although simplification introduces additional interference terms, both theoretical analysis and computer simulation show that this path-dependent multiuser detector (PCMUD) has much better anti-multipath multiple access interference performance than the traditional RAKE receiver. In addition, the detector has very little complexity and works well when the total number of paths exceeds the spread-spectrum gain.