兵工自动化
兵工自動化
병공자동화
ORDNANCE INDUSTRY AUTOMATION
2014年
3期
43-46
,共4页
查找表%CORDIC算法%混合型NCO%FPGA
查找錶%CORDIC算法%混閤型NCO%FPGA
사조표%CORDIC산법%혼합형NCO%FPGA
look-up table%CORDIC algorithm%hybrid NCO%FPGA
针对常用的在FPGA上实现NCO的查找表法和CORDIC算法存在的不足，提出一种基于查找表和CORDIC算法相结合的 NCO 实现方法。对查找表法、CORDIC 算法以及查找表和 CORDIC 算法相结合方法的实现原理进行设计，并分别对3种不同实现方式进行仿真和对比分析。结果表明：用查找法和CORDIC算法相结合的方法实现的NCO能很好地平衡FPGA上存储器资源和逻辑资源的消耗，并在产生信号的精度、速度、纯度方面也有很好的兼顾。
針對常用的在FPGA上實現NCO的查找錶法和CORDIC算法存在的不足，提齣一種基于查找錶和CORDIC算法相結閤的 NCO 實現方法。對查找錶法、CORDIC 算法以及查找錶和 CORDIC 算法相結閤方法的實現原理進行設計，併分彆對3種不同實現方式進行倣真和對比分析。結果錶明：用查找法和CORDIC算法相結閤的方法實現的NCO能很好地平衡FPGA上存儲器資源和邏輯資源的消耗，併在產生信號的精度、速度、純度方麵也有很好的兼顧。
침대상용적재FPGA상실현NCO적사조표법화CORDIC산법존재적불족，제출일충기우사조표화CORDIC산법상결합적 NCO 실현방법。대사조표법、CORDIC 산법이급사조표화 CORDIC 산법상결합방법적실현원리진행설계，병분별대3충불동실현방식진행방진화대비분석。결과표명：용사조법화CORDIC산법상결합적방법실현적NCO능흔호지평형FPGA상존저기자원화라집자원적소모，병재산생신호적정도、속도、순도방면야유흔호적겸고。
Aiming at the shortcoming of NCO look-up table method and CORDIC method in FPGA. Put forwards a NCO realization method which combined look-up table method with CORDIC method. Design realization principle of look-up table method, CORDIC method and method which combined look-up table method with CORDIC method. Then carry out simulation and comparison analysis of three methods. The results show that the NCO that is achieved by the combination of the look-up table and the algorithm of CORDIC can well balance the consumption of the memory resources and the logical resources and it can give consideration to the accuracy, speed, and purity of the signals it produces.
