Study Of Bistatic ISAR 2-D Imaging Algorithms

The concept, advantages and history of bistatic ISAR are introduced first in this paper, then 2-D turntable imaging of monostatic ISAR the special example of bistatic ISAR is studied. On the basis of monostatic ISAR four imaging algorithms are analyzed, including FFT algorithm, filtered backprojection algorithm, spectrum extrapolation algorithm and ESPRIT algorithm, and compared in the small and big angel of imaging. On the basis of monostatic imaging the 2-D turntable imaging principle of bistatic ISAR is studied,. the small rotational angel imaging is discussed and the resolution of cross-range and range are formulized. Then the simulation results and conclusion are given. For the effect of motion of target, a method of ISAR motion compensation based on scattering center tracking is used. For the difficulty of getting echo signal of bistatic ISAR of moving target, a method of simulating moving target using turntable data is used. Finally the imaging results by using simulating data based on scattering center tracking show the effectiveness of the methods.