MIMO-OFDM系统速率自适应传输方案  

A Novel Rate Adaptation Transmission Scheme for MIMO-OFDM System

作　　者：周克[1] 曹士坷[1] 宋荣方[1] 张力军[1] 

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

出　　处：《南京邮电大学学报（自然科学版）》2009年第5期21-26,共6页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(60572130);江苏省自然科学基金(BK2006235)资助项目

摘　　要：在采用TDD工作方式的MIMO-OFDM实际通信系统中,由于收发两端环境的不同导致干扰对称的假设不再满足。为了弥补这一影响,准确地确定系统的最佳传输参数,提出了一种基于事件驱动机制的闭环自适应传输方案。该方案通过在收发双方建立一条闭环控制信息传输链路,实现了迅速准确地确定最佳传输参数的目的。实验仿真结果表明,当在MIMO-OFDM系统中采用该方案时,可以有效提高系统的吞吐量,减小系统的中断概率。In MIMO-OFDM communication systems with time division duplex （TDD）, the situations between transmitter and receiver sides are different in practice, which make the assumption for the symmetric interference no longer valid. In order to address this problem, a robust close-loop interference adaptation mechanism based on an event-driven feedback is used to eliminate these effects that result from asymmetric interference. This method can achieve optimal adaptation transmission coefficients quickly and accurately by setting a close-loop link between transmitter and receiver sides. In a MIMO-OFDM system with the new transmission scheme, the system throughput can be greatly enhanced and minimum outage probability can be achieved.

关 键 词：MIMO-OFDM系统 不对称干扰 自适应传输 

分 类 号：TN929.5[电子电信—通信与信息系统] TN911.7[电子电信—信息与通信工程]