摘要
介绍了一种高效数字下变频的实现方法,重点介绍采用坐标转换数字计算机(CORDIC)在实现NCO的同时也完成了混频器功能。改进了滤波器组结构,在减少资源消耗的同时,实现了数字下变频功能。通过ISE和Modelsim仿真实验证明,该方案正确,且有效节省硬件资源,在短波电台的应用中取得了较好的效果。
A method of high-efficiency digital down-conversion is introduced.And a NCO technique based on CORDIC algorithm is put forward especially,and the function of the frequency mixer too.At the same time FPGA resource is saved,the filter structure is improved,and the DDC function is implemented.Simulations and experimentations prove that this method is very capable of making DDC and can save the hardware resource.It works well in the shortwave broadcasting station application.
出处
《电子信息对抗技术》
2010年第3期77-80,共4页
Electronic Information Warfare Technology
