MIMO-MB-OFDM UWB通信系统中空时频编码技术研究  

Research of Space-time-frequency Codes in MIMO-MB-OFDM UWB Communications

作　　者：毛蕙红[1] 曹雪虹[2] 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003 [2]南京工程学院通信工程学院,江苏南京211167

出　　处：《南京工程学院学报（自然科学版）》2009年第4期47-54,共8页Journal of Nanjing Institute of Technology(Natural Science Edition)

摘　　要：针对MB-OFDM UWB系统的性能特征,基于理论分析系统的成对错误概率,获知编码增益和分集增益的计算公式,从而得到空时频编码方案的设计准则.在此基础上,提出一种简化结构的空时频编码方案,并分析基于空时频编码的系统传输性能,为提高MB-OFDM UWB系统的性能给出了一个可行的方法.仿真结果表明,相比于传统的未编码的SISO-MB-OFDM UWB系统,该方案具有良好的系统误码率性能.而与8阶正交空时频编码方案相比,该编码方案结构简单,编解码复杂度比较低.Recently, the application of multi input multi output technology in uhra-wideband system is considered as a hot research topic. The channel coding technology is one of the principal technologies. Aiming at the performance characteristics of MB-OFDM UWB, the formula for coding gain and diversity gain is worked out based on pairwise error probability of theoretical analyzing system. Thus, a design principle of space-time-frequency codes is laid down which helps to propose a simplified method of this kind. This paper also examines the transmission performance of the space-time-frequency code system, which provides a feasible method for improving the performance of the MB-OFDM UWB system. Compared with the the traditonal uncoded SISO-MB-OFDM UWB system, the error code rate of this method is much lower. Moreover, this coding method is simpler and the codes are less complicated compared to the present order-8 space-time-frequency coding method.

关 键 词：多输入多输出 多频带超宽带 空时频编码 成对错误概率 

分 类 号：TN911[电子电信—通信与信息系统]