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介绍了一种基于现场可编程逻辑阵列器件 (FPGA)的中频移动通信衰落信道模拟系统设计方案 ,它可以模拟在地面环境下的移动通信传播特性 .该系统可以在实验室条件下评估移动通信终端的性能 .利用FPGA作为数字信号处理平台来实现可调的衰落带宽以及多径延时 .介绍了一个模拟最多三个不同传播路径的典型多径效应模型 ,通过增加相同的单元数目可以实现更多路径的模拟 .该通道衰落模拟系统专为速度达到 1 2 0km/h以及多径时延达到 9μs的移动单元设计
This paper introduces a design scheme of IF mobile communication fading channel simulation system based on field programmable logic array (FPGA), which can simulate the propagation characteristics of mobile communication in ground environment.The system can evaluate mobile communication terminal under laboratory conditions .Furthermore, we use FPGA as digital signal processing platform to realize adjustable fading bandwidth and multipath delay. A typical multipath effect model that simulates up to three different propagation paths is introduced, and more can be achieved by adding the same number of cells Path Simulation This channel fading simulation system is designed for mobile units designed for speeds up to 120 km / h and multipath delays up to 9 μs