Title :
A solution of two dimensional spectrum for general bistatic SAR
Author :
Yang, Kefeng ; He, Feng ; Du, Xiangyu ; Sun, Zaoyu
Author_Institution :
Dept. of Electron. Sci. & Technol., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
The paper derives the two-dimensional point target spectrum for general bistatic SAR configuration. For the kind of configuration the contributions of transmitter and receiver to the overall instantaneous Doppler frequency are unequal due to the different slant range history. In the paper the instantaneous Doppler contribution ratio is proposed to represent the difference of instantaneous Doppler contributions of transmitter and receiver, and the ratio is derived based on its meaning, which varies with instantaneous Doppler frequency. Then the two-dimensional spectrum is approximately obtained using the principle of stationary phase and Taylor series expansion for general bistatic SAR. The derived spectrum is verified with a point target simulation of general bistatic SAR.
Keywords :
Doppler radar; series (mathematics); synthetic aperture radar; 2D point target spectrum; 2D spectrum; Taylor series expansion; general bistatic SAR configuration; instantaneous Doppler contribution ratio; instantaneous Doppler frequency; slant range history; stationary phase; Azimuth; Degradation; Filtering; Focusing; Frequency; History; Matched filters; Paper technology; Taylor series; Transmitters; General bistatic SAR; instantaneous Doppler contribution ratio; point target spectrum;
Conference_Titel :
Radar Conference - Surveillance for a Safer World, 2009. RADAR. International
Conference_Location :
Bordeaux
Print_ISBN :
978-2-912328-55-7
