空间交会对接多体制接收机设计与实现简

空间交会对接时,空空通信系统需在两个航天器之间建立双向通信链路,完成两者间的信息交换.在载人航天交会对接任务中,空空通信系统担负交会对接段以及撤离段航天器间的双向链路数据传输任务.针对不同的任务模式、分析不同信号的解调模型和算法特点,基于软件无线电技术确定本系统的全数字化解调算法和硬件平台设计方案,实现过程运用复用/优化设计思路,节省了逻辑资源、降低了算法复杂度.对关键指标的测试表明,该设计可满足空空通信系统的指标需求.

The Design and Implementation of Multi-mode Receiver for Rendezvous and Docking in Space

During the manned spaceflight mission, space to space communication system is responsible for the information exchange between two spacecrafts at the rendezvous and docking and evacuation stages. For different mission stages, different communications modes are required. In order to fulfill the different mission requirements in the same hardware, the feature of various demodulation modes and algorithm was analyzed, and full digital demodulation algorithm and hardware design were determined based on software radio technology. A method of restructure and muhiplex was used to optimize the design, which leads to less logical resource and decreasing algorithm complexity. The result of the test for the system indicted that the key characteristic of the design could meet the speci- fication of the space to space communication system.