Effects of Doppler Centroid Error on Azimuth Ambiguity in Along-track Multi-channel SAR Systems

Inhalt:
Doppler frequency is a key parameter for spectrum reconstruction algorithm in multi-channel SAR system, which would inevitably deviate from true value due to Doppler centroid error. Based on the generalized characterization matrix proposed in this paper, the effects of Doppler centroid error on azimuth ambiguity are analyzed hierarchically from filter frequency response until AASR performance. Furthermore, a design example is employed to give a practical and intuitive analysis pattern, which could definitely benefit the multi-channel SAR system design on future work.