Abstract
Raw signal simulation is a useful tool for synthetic aperture radar (SAR) system design, mission planning, processing algorithm testing, and inversion algorithm design. Time and frequency synchronization is the key technique of bistatic SAR (BiSAR) system, and raw data simulation is an effective tool for verifying the time and frequency synchronization techniques. According to the two-dimensional (2-D) frequency spectrum of fixed-receiver BiSAR, a rapid raw data simulation approach with time and frequency synchronization errors is proposed in this paper. Through 2-D inverse Stolt transform in 2-D frequency domain and phase compensation in range-Doppler frequency domain, this method can significantly improve the efficiency of scene raw data simulation. Simulation results of point targets and extended scene are presented to validate the feasibility and efficiency of the proposed simulation approach.
Highlights
SAR is an imaging tool for remote sensing
As to rapid raw data simulation for fixed-receiver bistatic synthetic aperture radar (BiSAR) with time and frequency synchronization errors, the difficulties come from two aspects
The phase of (14) can be divided into three exponential parts: the first part is the frequency spectrum of transmitted chirp signal; the second exponential term is the phase related to the azimuth position of P, and the last exponential term is the phase related to 2-D spatial variation in fixed-receiver BiSAR
Summary
SAR is an imaging tool for remote sensing. It can work day-and-night in all weather conditions and acquire microwave images of the Earth’s surface with high resolution, which makes it unsubstitutable for surface surveillance. As to rapid raw data simulation for fixed-receiver BiSAR with time and frequency synchronization errors, the difficulties come from two aspects. Because of the premise that the simulated BiSAR system is an ideal translational invariant case, this method cannot realize 2-D spatial variation simulation for fixed-receiver BiSAR with time and frequency synchronization errors. Few studies are reported on rapid raw data simulation for fixed-receiver BiSAR with time and frequency synchronization errors. Without computing the scene raw data by the TBT method in time domain, the proposed method can realize 2-D spatial variation simulation for fixed-receiver BiSAR with time and frequency synchronization errors in 2-D frequency domain, and the simulation efficiency can be significantly improved. This paper is arranged as follows: Section 2 introduces the echo model of fixed-receiver BiSAR with time and frequency synchronization errors.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
