Title :
A Joint Detected-Directed Carrier Frequency Offset and Channel Estimation Technique for OFDM Systems
Author :
Zhao Dan ; Yu Quan
Author_Institution :
Sch. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha
Abstract :
A new joint carrier frequency offset (CFO) and channel estimation technique by using the detected data is developed for OFDM systems. The synchronization information contained in the channel estimated results which is gained by LS channel estimation method is extracted based on the maximum likelihood (ML) criterion for synchronization estimation, and then the estimated results of CFO are used to correct the initial estimated channel and make it approach to the real channel more strictly. In order to suppress noise, the closed-loop schemes are described in details. Set appropriate values for the loop factors, the algorithm can be used to tracking the time variable channel.
Keywords :
OFDM modulation; channel estimation; least squares approximations; maximum likelihood estimation; carrier frequency offset; channel estimation; least square method; maximum likelihood estimation; orthogonal frequency division multiplexing; synchronization estimation; synchronization information; time variable channel tracking; Channel estimation; Data engineering; Data mining; Educational institutions; Electronic equipment; Frequency estimation; Frequency synchronization; Maximum likelihood estimation; OFDM; Systems engineering and theory;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1311-9
DOI :
10.1109/WICOM.2007.91
