线性联合检测算法在TD-SCDMA系统中的性能分析与比较

Analyses and comparison of the performance of linear joint detection algorithms in TD-SCDMA system

时分、同步码分多址（TD-SCDMA）系统是基于时分双工（TDD）的块传输系统,它使用了联合检测这项关键技术来抵抗符号间干扰（ISI）和多址干扰（MAI）。以上行链路为例,本文分析了三种线性联合检测算法——匹配滤波块均衡器（MF-BLE）、迫零块均衡器（ZF-BLE）和最小均方误差块均衡器（MMSE-BLE）。从理论上,我们描述了这三种线性联合检测算法的基本原理,并对它们进行了比较（包括抗干扰性能和计算量）。随后,我们模拟了不同参数条件下（信道模型、码道数目、天线数目）这几种算法的性能,并与理论分析进行对照,得出一定结论。

Time-division, synchronous code-division multiple access (TD-SCDMA) system is a blocktransmission system based on the time-division duplex (TDD) mode. It uses a key technology-jointdetection to resist inter-symbol interference (ISI) and multiple access interference (MAI). In this paper,take the uplink as an example, we analyzed three kinds of linear joint detection algorithms-MF-BLE, ZF-BLE and MMSE-BLE. In theory, we described their principle and compared their performance, including computation and ability of resisting interference. Then we simulate their performance in different occasions, such as channel model, burst number and antenna number. Combing theory analyses and simulation results, we give some conclusion.