Title :
A new pilot assisted frequency synchronization for wireless OFDM systems
Author :
Lei, Wen ; Lu, Jianhua ; Gu, Jun
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A new frequency offset synchronization algorithm is proposed for OFDM systems over time varying multipath fading channels. This algorithm employs pilot symbols embedded in data symbols to estimate the frequency offset. In particular, a fine frequency offset estimate is achieved by properly combining frequency-offset estimates from pilots over different frequency locations. Moreover, the effects of time varying channels and the number of sub-carriers are analyzed and the rule for the selection of the number of OFDM symbols used for the synchronization algorithm is given. Simulations are conducted to demonstrate the effectiveness of the proposed scheme.
Keywords :
OFDM modulation; fading channels; frequency estimation; multipath channels; synchronisation; time-varying channels; fading channels; frequency offset estimation; frequency offset synchronization algorithm; multipath channels; pilot assisted frequency synchronization; time varying channels; wireless OFDM systems; Algorithm design and analysis; Digital audio broadcasting; Doppler shift; Fading; Frequency estimation; Frequency synchronization; Maximum likelihood estimation; OFDM; Wireless LAN; Wireless sensor networks;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on
Print_ISBN :
0-7803-7663-3
DOI :
10.1109/ICASSP.2003.1202739
