无线通信系统中的低码率空时网格码  

Low Rate Space-time Trellis Codes in Wireless Communication Systems

作　　者：邬钢[1] 陈明[1] 程时昕[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《电路与系统学报》2001年第4期61-64,共4页Journal of Circuits and Systems

摘　　要：空时网格编码能在频带利用率、分集增益、调制方式与编码网格图复杂度之间达到最佳的折衷。本文给出了几种低码率空时网格码的好码。理论分析和系统仿真表明,在相同的频带利用率下,该空时网格码可具有比空时块码级联卷积码具有更好的误码率性能,更适合于对频带利用率要求不高的功率受限无线通信系统。Space-time trellis codes can provide the best tradeoff between bandwidth efficiency, diversity gain, constellation size and trellis complexity. In this paper, some optimum low rate space-time trellis codes are proposed. Performance analysis and simulation show that the low rate space-time trellis codes outperform space-time block codes concatenated with convolution code under the same bandwidth efficiency. For this reason, they are more suitable for the power limited wireless communication system.

关 键 词：空时网格码 空时发射分集 频带利用率 无线通信系统 

分 类 号：TN92[电子电信—通信与信息系统]