| Abstract: | A method for extracting angle error information based on complex Morlet combined wavelets is proposed.This method analyzes the frequency domain characteristics of the angle error synthesis signal in the satellite angle tracking receiver. The angle error is included in the envelope of the angle error synthesis signal, and is manifested at the harmonic of the modulated wave. Selecting appropriate wavelet scale and position parameters can effectively extract the envelope information of synthesized signals. When the modulation fundamental frequency is determined, appropriate wavelet scale and position parameters can accurately extract the harmonic of the modulation fundamental, thereby achieving envelope detection of angular errors. This method is insensitive to Doppler frequency within the range of ±10kHz, and solves the problem of extracting angular error in the case of inaccurate Doppler frequency estimation. Finally, simulation was conducted on the envelope extraction of Morlet combined wavelet angle error synthesis signal using Matlab in the computer, demonstrating the feasibility and effectiveness of this method. |
