| 正交频分复用系统中的判决反馈干扰消除方法 |
| |
| 引用本文： | 卢照敢,张青苗,张太镒. 正交频分复用系统中的判决反馈干扰消除方法[J]. 计算机应用研究, 2007, 24(4): 68-70 |
| |
| 作者姓名： | 卢照敢 张青苗 张太镒 |
| |
| 作者单位： | 西安交通大学,电子与信息工程学院,陕西,西安,710049;华东交通大学,信息工程学院,江西,南昌,330013 |
| |
| 摘 要： | 针对正交频分复用系统中Hadamard载波干扰矩阵估计方法估计效果差,提出了基于判决反馈的载波干扰矩阵估计方法.该方法根据载波干扰矩阵可用傅里叶变换矩阵对角化的特性,通过离散傅里叶变换的输出来估计载波干扰系数,再根据符号判决结果更新载波干扰矩阵,可较快地跟踪信道的快速衰落.实验仿真表明,该方法与Hadamard载波干扰矩阵估计方法相比,结合比特交织编码调制技术可进一步提高系统的载波干扰消除能力.
|
| 关 键 词： | 正交频分复用 载波干扰 干扰消除 判决反馈 |
| 文章编号： | 1001-3695(2007)04-0068-03 |
| 修稿时间： | 2006-02-16 |
Decision Feedback based Intercarrier Interference Cancellation Method in OFDM Communication System |
| |
| LU Zhao gan,ZHANG Qing miao,ZHANG Tai yi. Decision Feedback based Intercarrier Interference Cancellation Method in OFDM Communication System[J]. Application Research of Computers, 2007, 24(4): 68-70 |
| |
| Authors: | LU Zhao gan ZHANG Qing miao ZHANG Tai yi |
| |
| Abstract: | Aiming at the drawbacks of larger estimation errors for Hadamard Inter-Carrier Interference(ICI) matrix estimation method,an decision feedback-based ICI cancellation method was proposed for Orthogonal Frequency Division Multiplexing(OFDM) communication systems.The ICI matrices for OFDM communication system could be diagonalized by Discrete Fourier Transform(DFT) matrices,and the output of DFT after decision could be used to estimate the ICI matrix.Using following decision symbols,ICI matrices could be updated instantly to trace the instantaneous changes of mobile recipient channels.Joined with Bit-Interleaved Coded Modulation(BICM),the method with comparison to Hadamard ICI estimation method can strengthen the resistibility of OFDM systems to ICI and this also is verified by simulation experiments. |
| |
| Keywords: | OFDM(orthogonal frequency division multiplexing) intercarrier interference ICI cancellation decision feedback |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《计算机应用研究》浏览原始摘要信息 |
|
点击此处可从《计算机应用研究》下载全文 |
|
