Aiming at the shortcomings of parameter setting and poor adaptability of the satellite channel simulator,a satellite channel simulator system with touch screen parameter control is designed.The proposed system hardware is mainly composed of FPGA as the main control unit,touch screen,and storage unit.We can achieve the display and setting of the parameters via controlling the touch screen.The proposed system software mainly uses NiosⅡ software to carry on the embedded design,it includes Nios Ⅱ soft core design,the touch screen program design,and the parameter control module design.After the system is powered,the FPGA first runs to load the program,controls the touch screen to initialize it,and displays the satellite channel parameter settings interface.Finally,the touch screen sends the touch data to the FPGA to update satellite channel parameter via touching the parameter control button.The designed system has the advantages of fast response,convenient parameter setting,and strong adaptability.%针对目前卫星信道模拟器采用上位机进行参数设置,适应性差的缺点,设计了一种卫星信道模拟器触摸屏参数控制系统.该系统硬件主要由FPGA、触摸屏和存储单元组成,FPGA作为主控单元,通过触摸屏控制实现参数的显示和设置.系统软件主要采用NiosⅡ软件进行嵌入式设计,包括Nios Ⅱ软核设计、触摸屏程序设计以及参数控制模块设计.系统上电后,FPGA进行程序加载,控制触摸屏对其进行初始化并显示卫星信道参数设置界面,触摸参数控制按键,触摸屏把触模数据传给FPGA进行卫星信道参数更新.该系统具有响应速度快、参数设置方便、适应性强等优点.
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