Onboard Sar Real-time Signal Processing, System Control And Interface Design

Synthetic Aperture Radar (SAR) is a kind of new imaging radar with high resolution. It could get high-resolution images under all weather, day and night and long distance conditions. So it is very important in military and civil applications. Currently, obtaining high resolution airborne SAR image is one of the most important development directions of SAR.As a new embranchment of the SAR, missile-borne SAR is taken much into account and research more and more. The realization of hardware and software of side looking stripmap missile-borne SAR is mainly studied in this dissertation. According to the characteristic of missile-borne signal processing and combining the technology of DSP and parallel processing, the system tragedy was accomplish cooperatively. The system was divided into three modules: digital signal processing board based on three chips of ADSP TS203 and one chip of FPGA, data interface board used for AD data converting and 1553B data transmission, and computer PCI interface card used for obtaining original echo when testing on computer. On the basis of analysis of system data flow, this dissertation introduces the design of control and interface of the real-time processing system of missile-borne SAR particularly. The real-time processing system of missile-borne SAR satisfies the requests of whole missile-borne radar system.The main work in this dissertation includes:1. According to the basic principle and signal processing of SAR imaging, accomplished the tragedy determination of missile-bome SAR real-time signal processing system which is divided into three modules.2. According to the data flow which is designed in this dissertation, the design of control and interface of missile-bome SAR real-time signal processing system is fulfilled.3. Acomplished the FPGA program in signal processing board and computer PCI interface borad independently.The driver and application of computer PCI interface borad were also completed independently. 4. Finished the test of missile-bome SAR real-time signal processing system in laboratory, it shows good performance.