Electronics Optics & Control, Volume. 22, Issue 8, 110(2015)
Doppler Compensation Algorithm Based on All-Phase FFT and Its Implementation
Doppler mismatch exists in bi-phase-coded echo signal of radar altimeter when used for matched filtering.To solve this problem,a ground echo model of radar altimeter is established,and based on a thorough analysis of the power distribution of echo signal and the phase characteristics of echo matrix,an echo Doppler detection and compensation algorithm based on all-phase FFT is presented.In this algorithm,the Doppler frequency and phase compensation factor are obtained through the phase difference value of echo matrix,which is measured by using all-phase FFT.Simulation and experiment results show that the algorithm is effective for phase compensation,and the Doppler detection error is less than 0.3 Hz.
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SUN Ya-zhou, WANG Guo-hua, ZHU Xiao-fei. Doppler Compensation Algorithm Based on All-Phase FFT and Its Implementation[J]. Electronics Optics & Control, 2015, 22(8): 110
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Received: Aug. 18, 2014
Accepted: --
Published Online: Aug. 25, 2015
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