南京郵電大學通信與信息工程學院 江蘇省南京市 210003
【摘要】
正交頻分復用(OFDM) 是一種多載波調制技術,它能有效地克服多徑干擾和碼間串擾，是第四代移動通信的核心技術。本文對正交頻分復用（OFDM）系統中基于導頻的信道估計技術進行了研究。
重點介紹了OFDM系統中幾種常用的信道估計技術，LS算法，LMMSE算法，ML算法以及改進的LS算法，并
給出了這些算法的仿真實現。
【關鍵詞】正交頻分復用；離散傅里葉變換；信道估計；最小二乘法估計；
Pilot-based Channel Estimation Methods For OFDM System
Lina HUANG，Xiuwei JIANG
College of Communication and Information Engineering Nanjing University of Posts and Telecommunications Nanjing Jiangsu 210003
Abstract：OFDM (Orthogonal Frequency Division Multiplexing) is the core technology of the fourth generation mobile communication which is a kind of multiple carrier modulation technology. It can effectively overcome multi-path interference and intersymbol interference. The channel estimation techniques for OFDM systems based on pilot-aided arrangement are investigated. This paper introduces several common channel estimation techniques in OFDM system, the LS algorithm, LMMSE algorithm, ML algorithm and improved LS algorithm are presented, also gives the algorithm simulation
Keywords：Orthogonal Frequency Division Multiplexing；DFT; channel estimation；LS；
參考文獻
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作者簡介
黃莉娜（1988-），女，南京郵電大學通信與信息系統專業，碩士研究生，主要研究方向為OFDM系統中的信道估計。
姜修偉（1988-），男，南京郵電大學通信與信息系統專業，碩士研究生，主要研究方向為OFDM系統中同步算法的研究。
