分层空时编码OFDM传输技术的研究  

Studies on Transmission Techniques of Layered Space-Time OFDM Systems

作　　者：苏鹏程[1] 孙军[1] 张继东[1] 史翠竹[1] 

机构地区：[1]上海交通大学图像通信与信息处理研究所,上海200030

出　　处：《应用科学学报》2004年第3期308-313,共6页Journal of Applied Sciences

基　　金：国家自然科学基金资助项目(60202006)

摘　　要：提出一种分层的空时OFDM系统结构,以在MIMO信道上提供分集增益并对抗频率选择性衰落的影响,在接收端采用一种层干扰抑制和干扰隐藏算法以克服多用户间的干扰,在带宽无线信道上实现多用户可靠的高速通信,并将它应用于可分级MPEG-4视频的传输.仿真结果表明该系统只需在适度的信噪比条件下就具有很好的传输性能.In this paper a layer and space-time coded OFDM system is proposed to provide a diversity gain for the MIMO channels and alleviate the frequency-selective fading effect. At the receiver, an algorithm of suppressing and cancelling interference among alyers is employed to overcome the interference among users and provide reliable communications with high data rate over wideband wireless channels. And this system can be used to transmit scalable MPEG-4 video. The simulation results show that the proposed system has good transmission performance in an environmnet with a moderate signal-to-noise ratio.

关 键 词：分层空时编码 多用户 层干扰抑制 运动图像 压缩编码 国际标准 OFDM 多输入多输出信道 正交频分复用 

分 类 号：TN911.22[电子电信—通信与信息系统]