| OFDM系统中基于MMSE-DFE的干扰消除算法 |
| |
| 引用本文： | 茅红伟,董淑冷,朱品昌,倪继锋,. OFDM系统中基于MMSE-DFE的干扰消除算法[J]. 上海师范大学学报(自然科学版), 2008, 37(3): 270-274 |
| |
| 作者姓名： | 茅红伟 董淑冷 朱品昌 倪继锋 |
| |
| 作者单位： | 上海师范大学机械与电子工程学院,上海,200234 |
| |
| 摘 要： | OFDM系统中，为去除码元间干扰（ISI）和载波间干扰（ICI）的影响，必须加足够长度的循环前缀（CP），导致带宽效率降低．建立了OFDM系统模型并对ICI和ICI进行了分析，在此基础上提出了一种基于最小均方误差（MSE）准则的判决反馈均衡（DFE）算法，可有效消除ISI和ICI的影响．分析和仿真结果表明：所提出的算法无论在带宽效率还是在误码率方面都要优于传统的OFDM系统。
|
| 关 键 词： | OFDM 判决反馈均衡器 串行干扰消除 |
An interference cancellation algorithm based on MMSE-DFE for OFDM system |
| |
| MAO Hong-wei,DONG Shu-leng,ZHU Pin-chang,NI Ji-feng. An interference cancellation algorithm based on MMSE-DFE for OFDM system[J]. Journal of Shanghai Normal University(Natural Sciences), 2008, 37(3): 270-274 |
| |
| Authors: | MAO Hong-wei DONG Shu-leng ZHU Pin-chang NI Ji-feng |
| |
| Affiliation: | (College of Mechanical and Electronic Engineering, Shanghai Normal University, Shanghai 201418, China) |
| |
| Abstract: | In OFDM system, cyclic prefix （CP） is necessary to combat inter- symbol interference （ISI） and inter-carrier interference （ICI） , which results in a considerable bandwidth loss. In this paper, the analysis of ISI and ICI in OFDM system is given. And a decision feedback equalization algorithm based on MMSE criteria is proposed to eliminate ISI and ICI. Simulation results show that the proposed scheme has higher bandwidth efficiency and better performance in bit error rate （BER） than conventional OFDM with sufficient CP length. |
| |
| Keywords: | OFDM decision feedback equalizer successive interference cancellation |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《上海师范大学学报(自然科学版)》浏览原始摘要信息 |
|
点击此处可从《上海师范大学学报(自然科学版)》下载免费的PDF全文 |
