【作者】 吴国伟； 姚琳； 张丽艳；

【Author】 Wu Guowei, Yao Lin, Zhang Liyan (Software School of Dalian University of Technology, Dalian 116023,China) (Communication College of Dalian JiaoTong University,Dalian, 116021 ,China)

【机构】 大连理工大学软件学院； 大连交通大学通信系；

【摘要】 本文提出一种OFDM系统中定时恢复与信道均衡联合设计方法。定时恢复是基于信道估计及选择合适的时间函数,通过使用特殊设计的成型滤波器,定时恢复可以取得很高的鲁棒性,同时基本消除前尾干扰.在MATLAB平台上对本文所提出的定时恢复方案和20抽头的判决反馈均衡器进行了仿真,结果表明,本文设计方法能明显提高系统性能,同时使得均衡器对定时恢复敏感度下降,是一种有效的方法。更多还原

【Abstract】 In this paper, a joint timing recovery and channel equalization design method is proposed for OFDM system. The timing recovery is based on channel estimation together with a properly chosen timing function. By using a specially designed shaping filter, a robust timing recovery can be achieved with essentially zero precursor Intersymbol Interference(ISI). An ADSL transceiver with a 20 taps feed-back equalizer using this timing recovery technique has been simulation on Matlab. The simulation results show that the proposed method is efficient, which can at the same time one side improves the system performance, on the other side reduce the equalizer’s sensitivity to timing recovery.更多还原