Improved Full-Diversity Quasi-Orthogonal Differential Space-Time Codes Scheme

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.