空间电子技术
空間電子技術
공간전자기술
SPACE ELECTRONIC TECHNOLOGY
2014年
1期
64-67,85
,共5页
频率估计%高精度算法%修正克劳美罗限
頻率估計%高精度算法%脩正剋勞美囉限
빈솔고계%고정도산법%수정극로미라한
Frequency estimation%Accurate algorithm%Modified Cramer-Rao Lower Bound( MCRLB)
文章提出了一种基于DFT插值的频率估计算法,充分利用峰值及其左右谱线的幅度信息与相位信息进行估计。理论分析证明其是无偏估计,仿真结果表明该算法的性能接近修正克劳美罗限( MCRB),而且工作的信噪比门限低。该算法复杂度低,运算量小,便于实现和应用。
文章提齣瞭一種基于DFT插值的頻率估計算法,充分利用峰值及其左右譜線的幅度信息與相位信息進行估計。理論分析證明其是無偏估計,倣真結果錶明該算法的性能接近脩正剋勞美囉限( MCRB),而且工作的信譟比門限低。該算法複雜度低,運算量小,便于實現和應用。
문장제출료일충기우DFT삽치적빈솔고계산법,충분이용봉치급기좌우보선적폭도신식여상위신식진행고계。이론분석증명기시무편고계,방진결과표명해산법적성능접근수정극로미라한( MCRB),이차공작적신조비문한저。해산법복잡도저,운산량소,편우실현화응용。
This paper presents an accurate algorithm for frequency estimation, which uses both the amplitude and phase of the DFT( Discrete Fourier Transform) results. The theory analyzes show that the algorithm is an unbiased estimator. The simulation results show that the performance of the algorithm is close to MCRB ( Modified Cramer-Rao Lower Bound) , and the characterization of SNR ( Signal Noise Ratio) threshold of the algorithm is similar to the maximum likelihood frequency estimation algorithm. The algorithm is easy to implement with hardware as the analyses of complicity implied.