研究无线通信中的调制编码的性能，分析编码调制在信道中的性能。-Study of wireless communication in the modulation coding performance, analyzing the performance of coded modulation in the channel.

空时编码在编码结构上有很多种方法，包括空时网格码（STTC）、空时分组码（STBC）和分层空时码（BLAST）-Space-time coding in the coding structure there are many ways, including the space-time trellis codes (STTC), space-time block codes (STBC) and BLAST (BLAST)