摘要
基于Frobenius范数理论,提出了正交空时多格形编码(OST-MTCM)方法。新方法通过在编码网格图中的每个网格传输分支上引入正交码字矩阵,并采用Ungerboeck的星座图扩展和集分割思想,从而在获得满分集增益的同时,也获得优秀的编码增益。仿真结果表明,相对于原有的空时多格形编码方法,在相同的码速率和编码状态数的情况下,新方法可以获得大约1.5 dB左右的性能改善;并且,网格分支上传输码字矩阵正交性的确定极大简化了好码的搜寻过程,无需针对不同的信道衰落条件设计不同的编码方案。
The design of orthogonal space-time codes employing multi-trellis coded modulation （OST- MTCM） is proposed based on Frobenius norm. In the new approach, by supplying an orthogonal transmitted codematrix for each trellis transition and employing Ungerboeck＇s set partitioning scheme, the maximum trans- mit diversity gain and optimum coding gain can be achieved. Simulation results confirm the proposed STBC- MTCM designs get about 1.5 dB coding gain over traditional ST-MTCM schemes. Furthermore, the transmit- ted branch matrix orthogonality is exploited to ease systematic code search procedure.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2008年第8期1403-1406,共4页
Systems Engineering and Electronics
