基于CORDIC算法的数字下变频技术设计与实现  

Design and implementation of DDC based on CORDIC algorithm

作　　者：侯武威[1] 袁安民[1] 赵颖辉[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《电子设计工程》2012年第9期35-37,40,共4页Electronic Design Engineering

摘　　要：传统的基于查表法的数控振荡器耗费大量的FPGA片内资源。为了解决这一问题,提出了一种基于CORDIC(coordinate rotation digital compute,坐标旋转数值计算)算法的数控振荡器的设计方法,而且该算法使数控本振和数字混频两个功能合在一起完成,省去了两个乘法器。最后通过仿真证明了其有效性,具有较高的工程应用价值。The traditional NCO based on look-up table method consumes lots of FPGA＇s resources,to solve this problem, this paper puts forward a numerically controlled oscillator technique based on CORDIC algorithm,the algorithm combines numerically controlled oscillator and digital frequency mixer together. Finally,its high efficiency is manifested by simulation and with high precision and great application value in project.

关 键 词：数控振荡器 CORDIC算法 数字下变频 

分 类 号：TN911[电子电信—通信与信息系统]