Title :
Frequency Synchronization in MIMO OFDM Systems
Author_Institution :
Sch. of Inf. Eng., Chang´´an Univ., Xi´´an, China
Abstract :
MIMO OFDM is a promising technique for the future wireless communications. However, the performance of MIMO OFDM systems is very sensitive to carrier frequency offset (CFO) which introduces inter-carrier-interference (ICI). Therefore, frequency synchronization is a critical problem in MIMO OFDM systems. In this paper, we study the problem of frequency synchronization in MIMO OFDM systems and propose a novel frequency synchronization scheme which uses training sequences composed of repeated pseudo-noise (PN) sequences for CFO estimation. Simulation results demonstrate that our scheme has very good performance, and is more robust and accurate than Schenk´s scheme both in the AWGN channel and in the multipath channel.
Keywords :
MIMO communication; OFDM modulation; frequency estimation; intercarrier interference; CFO estimation; ICI; MIMO OFDM system; carrier frequency offset; frequency synchronization; intercarrier-interference; pseudo-noise sequence; AWGN channels; Estimation; Frequency synchronization; MIMO; Multipath channels; OFDM; Training;
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
DOI :
10.1109/WICOM.2010.5600198
