| 分层空时编码OFDM传输技术的研究 |
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| 引用本文： | 苏鹏程,孙军,张继东,史翠竹. 分层空时编码OFDM传输技术的研究[J]. 应用科学学报, 2004, 22(3): 308-313 |
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| 作者姓名： | 苏鹏程 孙军 张继东 史翠竹 |
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| 作者单位： | 上海交通大学图像通信与信息处理研究所 上海 200030 |
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| 基金项目： | 国家自然科学基金资助项目(60202006) |
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| 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.
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| 关 键 词： | 分层空时编码 正交频分复用 多用户 层干扰抑制 超低比特率运动图像压缩编码国际标准 |
| 文章编号： | 0255-8297(2004)03-0308-06 |
| 收稿时间： | 2003-06-11 |
| 修稿时间： | 2003-12-01 |
Studies on Transmission Techniques of Layered Space-Time OFDM Systems |
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| SU Peng-cheng,SUN Jun,ZHANG Ji-dong,SHI Cui-zhu. Studies on Transmission Techniques of Layered Space-Time OFDM Systems[J]. Journal of Applied Sciences, 2004, 22(3): 308-313 |
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| Authors: | SU Peng-cheng SUN Jun ZHANG Ji-dong SHI Cui-zhu |
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| Affiliation: | Institute of Image Communication & Information Processing Research, Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | 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. |
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| Keywords: | space-time codes OFDM multiuser interfernce suppression MPEG-4 |
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