基于CORDIC算法的高速直接数字频率合成技术的ASIC实现  

ASIC Realization of High Speed Direct Digital Frequency Synthesizer Based on CORDIC Algorithm

作　　者：张进[1] 苏凯雄[1] 

机构地区：[1]福州大学电子技术研究所,福建福州350002

出　　处：《现代电子技术》2005年第12期103-105,共3页Modern Electronics Technique

摘　　要：文章主要分析了如何利用基于矢量旋转的CORDIC(CoordinationRotationDigitalComputer)算法实现高速高精度的直接数字频率合成技术(DDS)。首先推导了CORDIC算法产生正余弦信号的实现过程,然后给出了在FPGA中设计数控振荡器(NCO)的顶层电路结构,并根据算法特点在设计中引入流水线结构设计。This paper analyses a ASIC method that realizes the high speed and high precision Direct Digital Frequency Synthesizer (DDS) with the CORDIC (Coordination Rotation Digital Computer) algorithm based on vector rotation. Firstly, this paper explains how the algorithms work during producing sine and cosine signal. Then a toplayer circuits′ structure of Numeric Controlled Oscillator (NCO) in FPGA is presented, and a pipeline design is introduced according to the characteristic of the algorithm.

关 键 词：直接数字频率合成(DDS) CORDIC算法 现场可编程门阵列(FPGA) 数控振荡器(NCO) 

分 类 号：TP312[自动化与计算机技术—计算机软件与理论]