移动卫星通信系统中干扰抵消技术的研究

本文在对传统的并行干扰抵消ＰＩＣ算法和逐次干扰抵消ＳＩＣ算法进行了深入研究的基础上，提出了基于分组干扰抵消的ＭＩＣ算法和ＳＭＩＣ算法。其中ＳＭＩＣ算法具有计算量不大、计算时延小、硬件比较容易实现等优点。仿真结果表明，在相同传输环境下，采用ＳＭＩＣ算法的系统的误码率远低于ＳＩＣ和ＰＩＣ算法。当分组数较大时，采用ＭＩＣ算法的系统的误比特率优于ＳＭＩＣ算法，但其计算量较大。

Co-channel Interference Cancellation Techniques in Mobile Satellite Communication System

Two new group interference cancellation algorithms called MIC(Modified Interference Cancellation) and SMIC(Simplified MIC) are derived based on the research on the conventional Parallel Interference Cancellation(PIC) and Successive Interference Cancellation(SIC) techniques.The proposed SMIC algorithm bears such advantages as a reasonable computational requirement,a shorter time delay and the feasibility to be implemented.Moreover,simulation results have demonstrated that the system performance of SMIC is better than that of PIC and SIC.Though having a lower bit error rate when the number of groups is large,the system using MIC algorithm is much more complicated than that using SMIC.