基于弱群设计的酉空时星座图  

Design on Unitary Space-time Constellation based on Weak-Group

作　　者：雷向勇 程智慧[1] 王军生[1] 

机构地区：[1]海军装备技术研究所,北京102442

出　　处：《通信技术》2011年第5期3-5,共3页Communications Technology

摘　　要：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 construction for unitary space-time codes with Givens rotation matrices is proposed.For the weak-group property of the constellation constructed by this mothod,the construction and decoding complexity could be greatly reduced.The simulation shows that the constellations constructed by the proposed method have better diversity product and diversity sum when MIMO has a certain number of transmit antenas and a wide range of constellation sizes.

关 键 词：差分酉空时 分集积 分级合 弱群 

分 类 号：TN914.3[电子电信—通信与信息系统]