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�������պ����ѧѧ�� 2010, Vol. 36 Issue (7) :849-852    DOI:
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����ǿ, ŷ��, �Ŵ���, ��־��*
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Error analysis of frequency estimation algorithm based on frequency offset correction
Wang Jiqiang, Ou Pan, Zhang Chunxi, Lin Zhili*
School of Instrument Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� The principle of the frequency estimation algorithm based on frequency offset correction was presented. The computation formula of the frequency estimation-s standard deviation of a complex sinusoidal signal in white Gauss noise was obtained. The value of parameter m was optimized when the data length was  N, The algorithm can reach the minimum standard deviation when  m was the integer closest to  N/3. The Monte Carlo simulation results demonstrate that the algorithm based on frequency offset correction as the integer m is closest to  N/3 has lower standard deviation than the interpolation method with Hanning window and the phase difference method, while retaining a flat profile in the frequency range away from the fast Fourier transforms(FFT) discrete spectral line. The m-optimized algorithm-s standard deviation is less and closer to the Cramer-Rao lower bound(CRLB) than the one as m is the integer closest to N/2 when signal noise ratio(SNR) is higher.
Keywords�� frequency estimation   standard deviation   error analysis   Cramer-Rao lower bound     
Received 2009-05-21;
About author: ����ǿ(1980-),��,ɽ��������,��ʿ��,wangjiqiang95@gmail.com.
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����ǿ, ŷ��, �Ŵ���, ��־��.����ƵƫУ����Ƶ�ʹ����㷨������[J]  �������պ����ѧѧ��, 2010,V36(7): 849-852
Wang Jiqiang, Ou Pan, Zhang Chunxi, Lin Zhili.Error analysis of frequency estimation algorithm based on frequency offset correction[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2010,V36(7): 849-852
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2010/V36/I7/849
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