计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2014年
7期
41-45
,共5页
CORDIC算法%模校正因子%旋转因子乘法%快速傅里叶变换
CORDIC算法%模校正因子%鏇轉因子乘法%快速傅裏葉變換
CORDIC산법%모교정인자%선전인자승법%쾌속부리협변환
CORDIC algorithm%scaling-factor%twiddle factor multiplication%Fast Fourier Transform(FFT)
提出了一种改进的高基CORDIC算法，显著减少了传统CORDIC算法的迭代次数，同时保持模校正因子依然是一个常数。该算法可用于旋转角度能事先确定的场合，例如FFT计算中的旋转因子乘法。所设计的复数乘法模块采用SMIC 0.13μm工艺综合，结果证明，提出的结构相比通用复数乘法器节约了19.2%的硬件面积和29.1%的ROM存储器面积，同时SQNR大于83 dB，满足实际应用的要求。
提齣瞭一種改進的高基CORDIC算法，顯著減少瞭傳統CORDIC算法的迭代次數，同時保持模校正因子依然是一箇常數。該算法可用于鏇轉角度能事先確定的場閤，例如FFT計算中的鏇轉因子乘法。所設計的複數乘法模塊採用SMIC 0.13μm工藝綜閤，結果證明，提齣的結構相比通用複數乘法器節約瞭19.2%的硬件麵積和29.1%的ROM存儲器麵積，同時SQNR大于83 dB，滿足實際應用的要求。
제출료일충개진적고기CORDIC산법，현저감소료전통CORDIC산법적질대차수，동시보지모교정인자의연시일개상수。해산법가용우선전각도능사선학정적장합，례여FFT계산중적선전인자승법。소설계적복수승법모괴채용SMIC 0.13μm공예종합，결과증명，제출적결구상비통용복수승법기절약료19.2%적경건면적화29.1%적ROM존저기면적，동시SQNR대우83 dB，만족실제응용적요구。
A modified high-radix CORDIC algorithm is proposed, which significantly reduces iteration number of CORDIC algorithm and keeps scaling-factor as a constant. This algorithm can be applied in situations where rotation angle can be computed beforehand, such as twiddle factor multiplication of FFT(Fast Fourier Transform)computation. The designed plural-multiplication module is synthesized using the SMIC 0.13 μm process. Results proves that the proposed architecture has saved 19.2% hardware area and 29.1% ROM memory area in comparison with general-purpose plural multiplier, meanwhile it guarantees SQNR is above 83 dB which meets the practical requirement.
