线性多用户检测器的软件无线电实现

The Software Radio Realization of Linear Multiuser Detector

无线多媒体通信的实现要求对不同种类业务提供不同的服务质量 (QoS) ,文章将软件无线电技术应用于无线通信系统中 ,通过现场可编程门阵列 (FPGA)和数字信号处理器 (DSP)的配合实现DS -CDMA系统的线性多用户检测 ,可以根据业务要求与信道状况调整线性滤波器抽头值 ,从而动态选择检测器类型 ,在算法复杂度和性能上求得平衡。仿真结果给出了 4种线性多用户检测器对用户数及信噪比变化的性能比较。

The integration of multimedia services in wireless communication systems calls for various qualities of services (QoS). In this paper, we make use of software radio technology, via field programmable gate arrays (FPGA) and digital signal processor (DSP), implement a reconfigurable linear multiuser detector for Direct-sequence CDMA systems. According to service requirement and channel characteristics, it provides diverse QoS guarantees. Simulation resulot gives comparison of four different kinds of linear multiuser detectors with varying user number and Signal-to-Noise (SNR) condition.