随着遥感技术的飞速发展,遥感数据的传输速率和编码性能要求越来越高.在高码速率、复杂编码的条件下,设计符合国际空间数据系统咨询委员会(CCSDS)标准的高码速率解调器成为解决遥感卫星数据解调的关键.在软件无线电平台的解调器结构下,分析低密度奇偶校验码(LDPC)译码特点,完成译码模块结构、解调速率、存储规则的设计.设计结果满足高码速率遥感卫星解调器要求,提高了数据的下传效率和空间资源的利用效率.%With the rapid development of remote sensing technology, the requirements on the rates of remote sensing data and coding performance become more and more strict. Under high bit rates and complicated coding conditions, designing demodulator with high bit rate to meet the Consultative Committee for Space Data Systems(CCSDS) standard becomes the key to solve the remote sensing satellite data demodulation. In the demodulator structure of the software radio platform, the characteristics of Low Density Parity Check Code(LDPC) decoding are analyzed, the designs of decoding module structure, the demodulation rate and the storage rules are completed. The design results meet the requirements on high bit rate sensing satellite demodulator, which improves the lower transmission efficiency of data and the use efficiency of space resources.
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