US 12,280,895 B1
Azimuth ambiguity suppression method for spaceborne SAR in spatially non-uniform sampling
Yu Wang, Beijing (CN); ZhiYuan Xue, Beijing (CN); Liang Li, Beijing (CN); YongHua Cai, Beijing (CN); Bo Li, Beijing (CN); YiJiang Nan, Beijing (CN); and PingPing Lu, Beijing (CN)
Assigned to Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing (CN)
Filed by Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing (CN)
Filed on Nov. 27, 2024, as Appl. No. 18/962,937.
Claims priority of application No. 202411108412.7 (CN), filed on Aug. 13, 2024.
Int. Cl. G01S 13/90 (2006.01); B64G 1/24 (2006.01); G01S 7/32 (2006.01)
CPC B64G 1/24 (2013.01) [G01S 7/32 (2013.01); G01S 13/9011 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An azimuth ambiguity suppression method for a spaceborne SAR in spatially non-uniform sampling, comprising:
act 1: compensating for a phase difference between the channels according to locations of transmitting and receiving stations for channel echoes;
act 2: calculating an azimuth sampling location of each channel of the channels at a moment of a pulse transmission;
act 3: sorting azimuth sampling locations of all channels and their corresponding channel echoes after the phase difference between the channels is compensated in ascending order; and
act 4: calculating reconstructed echoes by using an adaptive weight-conjugate gradient-Toeplitz matrix algorithm in combination with a sorting result of act 3.