【摘要】 目的提出适用于多径衰落信道中的异步DS-CDMA盲自适应多用户检测算法。方法通过研究多径信号码空间和数据矢量空间,采用噪声子空间技术进行异步DS-CDMA系统期望信号矢量估计,同时利用了多径传播和接收机同步失调的特性。结果使用一种修改的ULV更新算法进行噪声子空间跟踪。结论仿真结果验证了本文算法的有效性。更多还原

【Abstract】 Aim To propose two blind adaptive multiuser detection for asynchronous DS-CDMA in multipath fading channel.Methods By investigating the code space of the multipath signals and the data vector space,the noise-subspace-based approach is used to estimate the desired signal vector for asynchronous DS-CDMA.The method exploits not only the characteristics of multipath propagation but also the characteristics of timing-offsets which may occur in the receiver.Results Furthermore,a modified ULV updating algorithm is applied to performing noise subspace tracking.Conclusion Simulation results are listed to show the effectiveness of the proposed algorithms.更多还原