Title :
Focusing of Tandem Bistatic-Configuration Data With Range Migration Algorithm
Author :
Wu, Qisong ; Liang, Yi ; Xing, Mengdao ; Qiu, Chengwei ; Bao, Zheng ; Yeo, Tat-Soon
Author_Institution :
Key Lab. for Radar Signal Process., Xidian Univ., Xi´´an, China
Abstract :
A bistatic range migration algorithm (RMA) based on an exact analytical bistatic point-target (PT) spectrum in the tandem configuration is proposed in this letter. For the conventional geometry-based bistatic formula method, the derived spectrum is only a quasi-analytical one because a variable called half-quasi-bistatic angle (HQBA) is not exactly analytically expressed. The key step of the proposed algorithm is to deduce an analytical HQBA in the tandem configuration, and thus, an exact analytical closed-form PT spectrum is acquired. Based on this analytical spectrum, a bistatic RMA is presented. It is demonstrated that this algorithm can handle the bistatic tandem configuration with extremely large baseline/range ratio and can also be applied to wide-swath imaging.
Keywords :
geometry; synthetic aperture radar; BiSAR; analytical bistatic point-target spectrum; bistatic range migration algorithm; bistatic synthetic aperture radar; geometry-based bistatic formula; half-quasi-bistatic angle; tandem bistatic-configuration data; wide-swath imaging; Algorithm design and analysis; Chirp; Focusing; History; Image processing; Laboratories; Radar signal processing; Signal processing algorithms; Synthetic aperture radar; Transmitters; Bistatic synthetic aperture radar (BiSAR); geometry-based bistatic formula (GBF); point-target (PT) spectrum; range migration algorithm (RMA);
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2010.2051532
