基于VCM的对地探测卫星数据传输体制分析

摘要

According to the situation that link margin is not fully used by conventional transmission methods during satellite mission, data transmission method based on VCM ( Variable Coding and Modulation ) is studied. Compared with conventional transmission methods, VCM method saves link margin and brings 35. 5% extra data throughput. Finally,suggestions for realizing VCM are given.%针对常规数据传输体制在卫星过境过程中不能充分利用系统链路余量的情况，开展了基于可变编码调制方式的卫星数据传输体制研究。通过分析比较发现，可变编码调制传输体制较常规数据传输体制节约了大量链路余量，使数据传输量提高了35.5%。最后，对可变编码调制传输体制的实现方式给出了建议。