請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/87963
標題: Third-Order Polynomial Frequency Estimator for Monotone Complex Sinusoid
作者: Jan-Ray Liao
Sheng-Kai Wen
關鍵字: frequency estimation
complex sinusoid
estimation bias
bias reduction
摘要: Frequency estimator of monotone complex sinusoid is a fundamental problem in signal processing. One of the approaches is to directly estimate the frequency from interpolation of the discrete Fourier transform coefficients. These direct approaches try to find a first-order approximation to the frequency and the remaining higher-order terms lead to estimation bias. In this paper, instead of considering the higher-order term as the source of error, we propose to use the higher-order terms to our advantage by solving the higher-order polynomial equation. We derive the conditions to obtain two third-order polynomial equations and the optimal conditions to apply the two equations. Experiments show that the new estimators can reduce the estimation bias by seven orders at large frequency offset.
URI: http://hdl.handle.net/11455/87963
顯示於類別:第25卷 第2期

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