基于软件无线电平台的信道模拟技术实现

信道模拟技术的研究与实现对无线通信系统的开发具有重要意义；在研究现有信道模型的基础上，提出了基于DSP＋FPGA平台的信道模拟技术。将复杂的信道模型算法置于计算功能强大的DSP中来实现；利用FPGA控制时序和DDR存储；通过AD9952提供FPGA工作时钟，同时控制输出信号读取时钟；由AD9777完成输出信号的数模转换。模拟了瑞利（Rayleigh）、莱斯（Ricean）N种信道。

Realization of Simulation Technology of Communication Channels Based on Software Radio Platform

The research and implementation of channel simulation technology is of very importance for the exploitation of wire- less communication system. On the basis of the research of the models of channels now available, a channel simulation technology based on the platform of DSP＋FPGA is proposed in this paper. The complex algorithm of channel model is implemented by the DSP with the powerful calculation function; the time sequence and DDR memory are controlled by using the FPGA; the FPGA＇s clock is supplied by means of AD9952 which controls the read clock of the output signal at the same time; and the digital-to-analogue con- version of the output signal is achieved by AD9777. The two channels of Rayleigh and Ricean have been simulated.