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一种利用Givens旋转矩阵构建酉空时星座图的新方法被提出。该方法构建的星座图由于具有弱群结构,当采用最大似然译时,接收端码元译码难度几译码复杂度较前大大降低。仿真结果表明,在发射天线数一定、星座容量大范围变化的情况下,该方法构建的星座图与目前各知名酉空时星座构建方法相比,其分级合及分级积计算复杂度及计算量降低,且分集合和分集积性能更为优异。
A new method of constructing unitary space-time constellations using Givens rotation matrix is proposed. Because constellation constructed by this method has weak group structure, decoding complexity of decoding symbols at the receiving end is greatly reduced compared with the decoding complexity when adopting maximum likelihood translation. The simulation results show that compared with the current well-known unitary space-time constellation construction methods, the constellation constructed by the proposed method has the same computational complexity and the computational complexity when the number of transmitting antennas is constant and the constellation capacity varies widely. Reduce the amount, and diversity and diversity plot performance is more excellent.