准正交空时分组码的自适应正交化设计  

Adaptive Orthogonalization Design for Quasi-Orthogonal Space-Time Block Codes

作　　者：董宇[1] 赵慧[1] 王文博[1] 

机构地区：[1]北京邮电大学泛网无线通信教育部重点实验室,北京100876

出　　处：《系统仿真学报》2010年第12期2882-2885,2899,共5页Journal of System Simulation

基　　金：国家自然科学基金(60802082)

摘　　要：为了能够在满足空时分组码完全分集的同时尽可能的降低译码复杂度,提出了准正交空时分组码的自适应正交化设计方案。在准正交空时分组码的编码结构上添加自适应系数,根据当前信道状态信息计算得到自适应系数的具体数值,使得传输数据符号之间相互正交,彼此没有干扰,从而实现完全分集,并且可以采用复杂度低的单符号译码方法恢复数据。仿真结果表明,准正交空时分组码自适应正交化设计方案的误码率性能明显好于利用星座旋转获得完全分集的准正交空时分组码方案,并且,只需要采用有限反馈的方法就能够实现近似理想反馈的误码率性能。Adaptive orthogonalization design for quasi-orthogonal space-time block codes was proposed to achieve full diversity and decrease decoding complexity.Known of channel state information,adaptive parameter could be calculated and input symbols could be coded in the designed structure.With the particular space-time codes structure,symbols on different antenna were orthogonal to each others and received symbols could be single-symbol decoded.Simulation results show that the adaptive scheme has obvious advantage compared with constellation rotation scheme.Limited feedback scheme is feasible and has almost the same optimal performance as the ideal full feedback scheme.

关 键 词：准正交空时分组码 自适应 正交化 完全分集 单符号译码 有限反馈 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]