一种新型的非正交空时编码设计

A Novel Non-Orthogonal Space-Time Coding Scheme

空时分组码和BLAST系统是两种利用多发多收传输的典型的空时编码系统。但由于空时分组码受正交条件限制,传输效率得不到提高,而BLAST系统存在差错传播制约着误码率的下降。综合了这两种系统的优点,提出了一种非正交空时分组编码设计,并将其描述为空时分组BLAST系统。仿真结果表明,新系统在不同信道环境、不同调制方式和天线数目的情况下都具有良好性能。可以显著改善空时分组码和BLAST系统的性能。

Space-time block code and BLAST are two typical systems utilizing MIMO. But the data efficiency of STBC is restricted to orthogonal transmission and the bit error rate of BLAST is high due to the error propagation. This paper combines the advantages of both systems and introduces a new non-orthogonal design of space-time block code. The performance of the new system in different number of antennas, modulation methods and channel environments is simulated. Results indicate that the new scheme can improve the performance with pure BLAST system greatly.