改进的全分集准正交差分空时码方案
Improved Full-Diversity Quasi-Orthogonal Differential Space-Time Codes Scheme
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摘要: 在传统的方案中,将准正交空时码(quasi-orthogonal space-time block codes)经过调制之后强行转换为酉空时码(unitaryspace-time codes)再进行差分编码.将调制方案进行改进,以使得码元之间的距离增大,以提高其编码增益,从而提高系统性能.与传统的准正交差分空时码相比,所提方案误码性能得以提高.Abstract: In the traditional scheme, the modulated quasi-orthogonal space-time codes is transformed to be unitary space-time codes then the program of differential encoding could be constructed. Transforming the method of modulation, a new scheme is proposed to expand the code distance which could advance the codes diversity so as to enhance the performance. Compared with the traditional differential space-time codes, this scheme could increase the performance.