An Area Optimized Direct Digital Frequency Synthesizer Based on Improved Hybrid CORDIC Algorithm
An Area Optimized Direct Digital Frequency Synthesizer Based on Improved Hybrid CORDIC Algorithm
复制标题
基于改进混合CORDIC算法的区域优化直接数字频率合成器
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Zhancai Li
中科院分区：
文献类型：
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作者：
Ru Xin;Xiaotong Zhang;Han Li;Qin Wang;Zhancai Li
提出了一种基于改进的混合坐标旋转数字计算机（CORDIC）算法的面积优化直接数字频率合成器（DDFS）实现技术。算法级的研究主要集中在如何降低算法复杂度，如减少所有的旋转相位判决电路和乘法器，采用软硬件协同设计的方法简化比例因子等。在体系结构层次上，采用流水线多级循环迭代实现方案，实现了移位和加法器的高度重用。该设计已成功集成在宽带网络片上系统（SoC）平台的信道解调模块中。具有一般性，该技术也可应用于其他无线网络通信系统。
This paper proposes a novel implementation technique for area optimized direct digital frequency synthesizer (DDFS) based on improved hybrid coordinate rotation digital computer (CORDIC) algorithm. Researches at algorithmic level focus on how to reduce algorithm complexity, such as cutting down all of rotational phase decision circuits and multipliers, simplifying scale factor with soft hardware co-design approach. At architectural level, the pipeline multilevel loop iteration implementation proposal is adopted for reusing shifting and adder-subtractor components highly. The design has been successfully integrated in a channel demodulation module of broadband network system on chip (SoC) platform. With generality, the technique can be also applied to other wireless network communication system.