【摘要】 分层空时编码是应用于多输入多输出系统中的一种空时编码,具有结构简单、易于实现且频带利用率随着发射天线数目的增加而线性增加等优点。针对分层空时编码传输速率高、无法获得最大分集增益以及系统抗衰落性能差等缺点,提出了一种结合空时分组码的混合结构模型——分层空时混合码。同时,介绍了分层空时编码检测算法的最新进展以及分层空时编码在自由空间光通信、OFDM系统中的研究成果及应用。更多还原

【Abstract】 Layered space-time coding is a kind of space-time coding applied to multiple-input multiple-output system,which has a simple structure,easy to realize,and it’s bandwidth utilization shows a linear increase as antenna numbers increased,etc.In order to obtain more diversity gain and overcome system resistance decline,the paper presents a layered space-time hybrid coding architecture which is combined V-BLAST with space-time block coding(STBC).At the same time,the latest progress of detection algorithm for layered space-time codes is presented.And it is introduced that the layered space-time codes is applied in free space optical communication and OFDM system.更多还原