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为了改进超正交空时格码的设计,提出了基于迹准则的设计方法.分析了传统基于秩行列式准则设计方法的缺点,以及基于迹准则设计的优点.研究了基于迹准则的设计方法中STBC方案、集分割、网格结构、信号子集与STBC方案在网格中的分配这四大要素的优化原则,并依据这一原则给出了码的系统化手工设计的具体步骤.再通过星座扩展的方法,可以使设计出的码性能进一步提高.文中给出了码的设计结果,仿真表明得到的新码具有更好的性能.
In order to improve the design of hyperspace orthogonal space-time trellis codes, a design method based on trace criteria is proposed. The disadvantages of the traditional rank-based criterion design method are analyzed and the advantages of the design based on the track criterion are analyzed. In the STBC scheme, set partitioning, grid structure, signal subset and the STBC scheme in the grid of these four elements of the optimization principle, and according to this principle gives the code of the systematic manual design steps. Through the constellation expansion method, the designed code performance can be further improved.The code design results are given in the paper, and the simulation shows that the new code obtained has better performance.