To solve the problem of velocity ambiguity caused by over high azimuth velocity in the conventional SAR/GMTI system, a kind of multi-channel interferometric SAR/GMTI scheme solving the radial velocity ambiguity of moving target is presented in this paper. This method sets up four non-uniformly interval receiving channels and designs each channel spacing reasonably. Interferometric cancellation is carried out on the sub image of two echo signal, then it can get two velocity sets, and the intersection of the two sets is the correct estimation of the target velocity. Thus, the problem of velocity ambiguity is solved effectively and the radial velocity of the target is estimated correctly. Analysis and computer simulation demonstrates the validity of the method.

Date Published: 12 March 2019
PDF: 9 pages
Proc. SPIE 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 1102312 (12 March 2019); doi: 10.1117/12.2521218

Published in SPIE Proceedings Vol. 11023:
Fifth Symposium on Novel Optoelectronic Detection Technology and Application
Qifeng Yu; Wei Huang; You He, Editor(s)