星地一体化极化复用接收实验比对标准研究

Integration of satellite and ground polarization multiplexing receiving experiment ratio standard research

随着高分辨率对地观测卫星的快速发展,地面接收系统所面临的数据速率与系统带宽间的矛盾越来越突出,固有的单极化接收难以满足带宽要求,虽然极化复用接收能有效地解决带宽不足的问题。但极化复用的难点在于两个极化间存在不可避免的干扰,对星地链路的极化隔离度要求很高。经理论分析发现极化复用接收性能取决于星地间的联合隔离度,随着星地天线空间关系的不同,隔离度会发生变化。由于星地联合隔离度的不确定性,设计极化复用接收的比对标准是极化复用接收结果处理上面临的主要难点,为验证理论分析,极化复用体制下的接收试验不可或缺。

With the rapid development of high resolution earth observation satellite,the contradiction between data rate and system bandwidth ground receiving system facing the increasingly prominent,single polarization inherent reception is difficult to meet the bandwidth requirements,while receiving polarization multiplexing can effectively solve the problem of insufficient bandwidth.But the difficulty lies in the existence of polarization multiplexing inevitable interference two polarization,polarization isolation requirements of satellite ground link is very high.The theoretical analysis shows that the polarization multiplexing receiver performance depends on the combination between satellite and ground isolation,with satellite antenna spatial relationship is different,the isolation will change.Due to the uncertainty of satellite ground isolation design,polarization multiplexing receiving ratio standard is the main difficulty of polarization multiplexing receiving results processing,for verification of the theoretical analysis,an experiment system of polarization multiplexing receiver.