TD-SCDMA系统下行链路中的chip级均衡技术

Research on chip-level equalization for TD-SCDMA downlink

chip级均衡有较低的算法复杂度,可用于CDMA下行链路中以提高下行容量。针对TD-SCDMA系统,分析了下行链路离散系统模型,讨论了chip级均衡在TD-SCDMA中的应用及实现,讨论了与以往所采用的多用户检测的差异,并对几种主要的chip级均衡算法进行了仿真对比,给出了适合于TD-SCDMA系统的均衡算法。

Chip level equalization in the forward link of Code Division Multiple Access （CDMA） Channels was proposed recently as a method to improve the capacity of downlink because of its low complexity. In this paper the authors studied the system model of TD-SCDMA, put the method of chip level equalization on the TD-SCDMA system; contrast this method with the JD, which were adopted before. The numerical results of several equalizers show the MMSE chip-level equalizer is suitable most for TD-SCDMA because of its reasonable complexity and preferable performance.