W-CDMA系统中，各基站之间是异步时序关系。为了快速识别基站，3GPP协议引入了三步同步的小区搜索算法。第一步对主同步信道的搜索是极其重要的。采用传统的戒备匹配滤皮器结构占用的硬件资源非常庞大。主同步信道是由广义分层Golay序列构成的。根据其构造特性。我们提出一种新颖的广义分层Golay匹配滤波器（简称GHGMF）。理论分析证明该结构大幅度降低了硬件实现的复杂度，对于工程应用具有重要价值。

A novel adaptive algorithin based on pilot chan-nel (PCA) for MMSE muliuser detcction in downlink CDMA is proposed in this paper. This algorithm ases the information in pilot channel to compute the desired weight vector dieetly. Compared with conventional adaptive algorithms [7] and blind algorithms, it does not require training sequences nor chaunel estimation. Analysis shows that the weight vector obteined by the PCA algorithm converges to the Wiener solution globally and its computational complexity is O (N2). Simulation results show that the. PCA algorithm can adapt rapidly to the changing en-vironment. The steady state performance can be enhanced by increasing sthe transmitted power in pilot channel, but is worse than that of conventional reeursive least-square (RLS) algorithm in decision-directed mode. A tso, performance of the adaptive MMSE detcctor is much better than that of conventional RAKE receiver

Efficient power control in of great importance in the design of high capacity cellular radio systems. Optimum power control scheme, in the sense that it minimises the outage probability, has been fully investigated for FDMA/TDMA cellular systems. The authors propose opitmum power control and several centralised power control algorithms for CDMA cellular systems. Simulation results indicate that the optimum power control scheme outperforms the perfect average power control algorithm by～1.9dB under the IS-95 defined radio condition

在分析第三代移动通信系统的基础上，使作EDA工具Cossap，自行开发了WCDMA 完整的函数库，重点对WCDMA系统的物理链路层结构进行了系统仿真，建立了上行链路（UL）和下行链中（DL）仿真平台。本文根据TIU-RM，1225建议的径衰落环境，分别根据1998年9月ETSI的WCDMA草案和1999年11月“IMF2000无线接口技术规范”建议，对话间信道和数据信道进行了全面的仿真测试。

本文综述了Shannon编码定理指导下信道编、译码的发展概况及趋势。全面、系统地分析了最近引起普遍强烈关注的Turbo码的基本构造原理和其能够达到惊人的优异性能的原因。指出了目前该领域一些很有理论价值与应用意义的研究方向。