Efficient imaging method for multireceiver SAS

With the Loffeld's bistatic formula, point target reference spectrum (PTRS) of multireceiver synthetic aperture sonar (SAS) can be decomposed into quasi monostatic term and deformation (BD) term. The former is analogous to SAS PTRS while latter one describes phase introduced by displacement between transmitter receiver. echo signal transformed equivalent data after correcting BD Based on range sub-block processing method, this transformation conducted using preprocessing step. Then, fast imaging processors based system directly exploited process data. In paper, authors mainly focus application non-linear chirp scaling algorithm. At last, simulations real are used validate presented method. results show that performance method nearly close traditional Besides, efficiency highly improved compared centre approximation (PCA)