多速率CDMA系统自适应接收机

随着移动通信的发展，多速率数据通信业务越来越多。第三代移动通信系统能够支持可变服务质量的不同数据速率业务。因此，多速率接收机的研究也越来越引起重视。多速率系统中，当干扰信号具有不同速率参数时，不同用户的周期平稳性不同，单速率自适应FIR接收机的性能会严重下降。提出了一种适合于多速率多址干扰下的自适应滤波器组接收机，仿真结果表明，自适应滤波器组接收机能够更有效地消除多种模式的多址干扰，比单速率接收机具有更好的性能。

Adaptive Receiver for Multi-rate CDMA System

Providing a wide range data rates wit h variable quality of service is the r equirement of 3G systems.In such systems,the cyclo -stationary properties of the signals of the different users in the system are different,resulting a single FI R filter yields a highly degraded performance.In this paper,we derive th e optimal receiver structure for a mul ti -rate CDMAsystemand showit to be a bank of transversal filters.Simu-lation results are provided to demon strate that the bit error rate performance gain is obtained with an adaptive filter bank receiver over an adaptiv e single filter receiver.The derivation and extensive performance investiga-tion of the optimum structure for a mu lti -rate system constitute original contributions of this paper.