DocumentCode :
3487972
Title :
Time-Varying Channel Estimation for MIMO OFDM Systems
Author :
Lu Zhen ; Ge Jian Hua
Author_Institution :
Dept. of Electr. Eng., ShangHai JiaoTong Univ., Shanghai
fYear :
2007
fDate :
21-25 Sept. 2007
Firstpage :
385
Lastpage :
388
Abstract :
In this paper, new training sequences and frame structure are proposed to estimate time-varying channel for MIMO OFDM systems. The training sequences named modulatable orthogonal polyphase sequences have both good autocorrelations and cross-correlations. They are used as guard interval instead of cyclic prefix, which not only improve the transmission efficiency but also make the channel estimator can track time-varying channel. The channel impulse response can be obtained by measuring the correlation between the received training sequence and the locally generated training sequence. The simulation results show that the proposed estimation method has better performance than conventional methods in fast time-varying channel.
Keywords :
MIMO communication; OFDM modulation; channel estimation; correlation methods; time-varying channels; transient response; MIMO OFDM systems; channel estimation; channel impulse response; modulatable orthogonal polyphase sequences; time-varying channel; Autocorrelation; Channel estimation; Electrical engineering; Intersymbol interference; MIMO; OFDM modulation; Receiving antennas; Signal detection; Time-varying channels; Transmitting antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1311-9
Type :
conf
DOI :
10.1109/WICOM.2007.103
Filename :
4339878
Link To Document :
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