DocumentCode :
2554416
Title :
Optimal Pilot Sequences for Correlated Fading Channels in MIMO-OFDM System
Author :
Geng, Xin ; Hu, Hanying ; Cui, Weijia ; Wang, Mingkun
Author_Institution :
Dept. of Commun. Eng., Inf. Sci. & Technol. Inst., Zhengzhou, China
fYear :
2010
fDate :
23-25 Sept. 2010
Firstpage :
1
Lastpage :
4
Abstract :
It is well known that the realization of enormous capacity of multiple-input multiple-output (MIMO) channels depends greatly on the accuracy of channel estimation at the receiver. And the problem of designing optimal pilot or training sequences is crucial to channel estimation. In this paper, the optimal pilot sequences are designed by maximizing the mutual information (carried by pilot tones) between the channel and the received sequences during the training over multiple OFDM symbols. Therein the MIMO channel is assumed to be frequency-selective and obey block-fading law with both spatial fading correlation and multipath tap gain correlation known at both transmitter and receiver. Simulations show that the designed optimal pilot sequences outperform the orthogonal pilot sequences. It is also concluded that this performance gap between the two types of pilot sequences is dominated by different conditions of spatial fading correlation and multipath tap gain correlation.
Keywords :
MIMO communication; OFDM modulation; channel estimation; fading channels; multipath channels; MIMO OFDM system; MIMO channel; OFDM symbol; channel estimation; correlated fading channel; multipath tap gain correlation; optimal pilot sequence; spatial fading correlation; Channel estimation; Correlation; Fading; MIMO; OFDM; Training; Wireless communication;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications Networking and Mobile Computing (WiCOM), 2010 6th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-3708-5
Electronic_ISBN :
978-1-4244-3709-2
Type :
conf
DOI :
10.1109/WICOM.2010.5600675
Filename :
5600675
Link To Document :
بازگشت