一种新的空时码构造方法

空时编码调制是一种充分利用分集特性克服信道衰落的一种编码调制方式。文中提出一种构建空时码的新方法 ,可以通过计算机搜索获得最优空时码 ,并给出一种基于最优距离卷积码的构造方法。采用文中所提出的空时码 ,可以获得空间、时间分集增益并取得最大码增益。仿真结果表明 ,其性能比以往文献中提到的空时码有明显提高。

A New Way to Construct Space-time Code

Space time coded modulation has been shown to efficiently use transmits diversity in Raleigh fading channel.We hereby present a newway to construct space time code, and the way of finding the optimal code by systematic code search on computer; and a more simple way to construct space time code based on optimal distance convolution code as well. The code constructed this way can get diversity both time and space, and get maximum code gain; the simulation result indicats that the performance of the new space time code is better than known codes.<