With the development of astronomical technology, telescope manufacturing technology and electronic technology, the astronomical field increasingly high demand on the processing speed of the system, and how to achieve these system is directly related to the progress of astronomical research, therefore looking for effective method to realize these system is very meaningful. FPGA not only computing speed and parallel computing; DSP can easily and quickly realize lots of complex algorithms and control. We developed the real-time and parallel system based on FPGA+DSP to effectively realize the high-speed and real-time computing in astronomical field. After comparative study FPGA and DSP, we developed the SDIMM by using FPGA+DSP in order to solve the contradiction between the data acquisition and processing of the existing SDIMM, and further demonstrated that the FPGA+DSP architecture will become a mainstream trend solve the high-speed and real-time system in the field of astronomy. This thesis is divided into five parts: The first chapter introduces the subject background and significance and research and development trends of domestic and overseas of this topics; The second chapter details the architecture, superiority and field of application about FPGA+DSP; The third chapter introduces the development of SDIMM by using FPGA+DSP, details how to achieve and gives some test data; The fourth chapter summarizes the thesis and gives the next job outlook.
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