基于小角度映射的NCO设计  

Numerically Controlled Oscillator Design Based on Narrow Angle Mapping Technique

作　　者：窦建华[1] 梁红松[1] 潘敏[1] 耿锐[1] 

机构地区：[1]合肥工业大学计算机与信息学院,安徽合肥230009

出　　处：《微电子学与计算机》2008年第1期134-136,共3页Microelectronics & Computer

摘　　要：为了降低振荡器的等待时间,提出了一种小角度映射方法。该方法将整个周期的角度运算映射到小角度范围内,减少了流水线级数,提高了运算速度。仿真结果表明,该方法与查表法相比,占用资源少;与CORDIC算法相比,降低了迭代次数。在保证高计算精度的同时,具有运算速度快、功耗低等特点。A narrow angle mapping technique has been proposed and described concisely to solve the problem. The technique could map a whole cycle to a narrow angle, reducing the pipeline number. At last simulation result was given, in contrast with the NCO based only on look- up table, its advantage is much less resource consumption; In contrast with the NCO based only on CORDIC algorithm, its advantage is shorter pipeline. The NCO design using Narrow Angle Mapping Technique could enhance operational precision, provides higher speed operation, lower power waste.

关 键 词：数控振荡器 CORDIC算法 角度映射技术 

分 类 号：TP31[自动化与计算机技术—计算机软件与理论]