Letter Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of Isap2010 Doppler Centroid Estimation for Space-surface Bisar
Letter Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of Isap2010 Doppler Centroid Estimation for Space-surface Bisar
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通讯作者：
Weiming Tian;Jian Yang;Xiaopeng Yang
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作者：
Weiming Tian;Jian Yang;Xiaopeng Yang
相位同步是双基地合成孔径雷达（BiSAR）的一个关键问题。由于相位同步误差和多普勒相位具有近似的形式，无法用传统的方法估计双合成孔径雷达的多普勒中心。提出了一种利用双通道直达信号相位干涉法进行直流估计的方法。通过相位干涉技术，可以在保留多普勒相位的同时抵消相位同步误差，并由保留的相位估计直流分量。
SUMMARY Phase synchronization is a crucial problem in Bistatic Synthetic Aperture Radar (BiSAR). As phase synchronization error and Doppler phase have nearly the same form, Doppler Centroid (DC) cannot be estimated with traditional method in BiSAR. A DC estimation method is proposed through phase-interferometry of Dual-channel direct signal. Through phase interferometry, phase synchronization error can be counteracted while Doppler phase is reserved and DC can be estimated from the reserved phase.