摘要 : APES (Amplitude and Phase EStima- tion) is an adaptive FIR filtering approach intro- duced recently for complex spectral estimation. For stationary signals, APES can yield more accurate spectral estimates than the widely used Capo... 展开 APES (Amplitude and Phase EStima- tion) is an adaptive FIR filtering approach intro- duced recently for complex spectral estimation. For stationary signals, APES can yield more accurate spectral estimates than the widely used Capon and FFT estimators. The authors present a recursive APES algorithm for time-varying spectral analysis, which is computationaly effi- cient and only involves FFT and simple matrix operations. The recursive APES algorithm is applied to ISAR (inverse synthetic aperture radar) imaging and feature extraction of targets with complex manoeuvring motion. Both numeri- cal and experimental examples are provided to demonstrate the performance of the proposed method. 收起