【作者】 丁朋华； 胡明； 胡飞；

【Author】 DING Peng-hua~1 HU Fei~2 HU Ming~1 (1.University of electronic science and technology of china,chengdu,610054,china) (2.The 30~(th) institute of chain electronics technology group corporation of,chengdu,610041,china)

【机构】 电子科技大学通信与信息工程学院； 信息产业部第三十研究所；

【摘要】 该文介绍了一种在 OFDM 系统中,利用导频信息,采用期望最大化(EM)的思想直接估计 OFDM 信号的方法,该方法不需要额外的信道信息,导频占用频谱资源较少,且收敛性较快。仿真结果表明在慢衰落信道下,该算法性能几乎接近于理想情况。更多还原

【Abstract】 The paper introduces a method based on expectation maximization for estimating the signals of OFDM system assisted by pilot tone.The method does not need extra information of channel and the overhead caused by pilot symbols is much less.The algorithm comes to its convergence rapidly.The result of simulation shows its validity in slow fading channel and be close to the perfect.更多还原