高分辨DFT调制滤波器组的设计及其在通信信号处理中的应用

项目名称： 高分辨DFT调制滤波器组的设计及其在通信信号处理中的应用

项目编号： No.61261032

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 蒋俊正

作者单位： 桂林电子科技大学

项目金额： 40万元

中文摘要： 在新一代宽带通信系统中，高速数据传输技术是核心技术之一。随着OFDM传输技术研究的不断深入，其显现出时频聚集性差、频谱泄露严重等缺陷，难以达到高的频率分辨率(简称高分辨)。DFT调制滤波器组可具备高分辨，有望改善OFDM的缺陷。然而，现有的DFT调制滤波器组的设计算法大都基于半定规划，算法复杂度高，难以实现高分辨DFT调制滤波器组的设计。并且，在实际通信系统中，滤波器组难免受到噪声和干扰等随机因素的影响。但是，现有的方法基本未考虑随机情况下DFT调制滤波器组的设计问题。基于这几点，本项目拟利用线性搜索算法(linear search algorithm)和双迭代算法来研究高分辨DFT调制滤波器组的快速设计问题，同时拟利用鲁棒优化(robust optimization)方法来研究高分辨DFT调制滤波器组的稳健设计问题，并研究高分辨DFT调制滤波器组在多载波传输等通信信号处理中的应用。

中文关键词： DFT调制滤波器组；多载波调制技术；正交频分复用；高分辨；

英文摘要： In the new-generation broadband communication systems, high-speed data transmission technique is one of the crucial techniques. Along with the deepgoing investigation of the OFDM transmision technique, it is found that OFDM suffers from poor time-frequency aggregativeness and serious spectrum leakage. As a result, it is difficult for the OFDM to realize high freqeuncy resolution (also known as high-resolution). Such deficiency of the OFDM can probably be remedied by the DFT modulated filter bank, which has the potential to realize high-resolution. However, the conventional design algorithms of the DFT modulated filter bank are mostly based on the semi-definite program, which is of high computational complexity. Therefore, it is difficult for the existing algorithms to design high-resolution DFT modulated filter bank. Furthermore, the filter bank is always influenced by noise and interference in the real communication systems. Nevertheless, existing methods basically have not considered the design of the DFT modulated filter bank under stochastic condition. In view of these points, in this project, the linear search algorithm and the bi-iterative algorithm are used in fast design of the high-resolution DFT modulated filter bank, the robust optimzation is utilized in robust design of the filter bank, and the appli

英文关键词： DFT modulated filter bank；Multicarrer modulation technique；Orthogonal frequency division multiplexing；High resolution；