Title :
A novel frequency synchronization algorithm based on time diversity for OFDM
Author :
Tao, Tao ; Wen, Lei ; Jianhua, Lu
Author_Institution :
Dept of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
We present an improved maximum likelihood estimation (MLE) algorithm for preamble-based OFDM frequency synchronization. This proposed algorithm employs time diversity schemes to reduce the effects of fading channels. In particular, two combining methods, selection diversity (SD) and maximum ratio combining (MRC) are investigated and analyzed. Simulation results demonstrate that the proposed algorithm significantly improves the performance of frequency synchronization in multipath fading channels.
Keywords :
AWGN channels; OFDM modulation; Rayleigh channels; diversity reception; land mobile radio; maximum likelihood estimation; multipath channels; synchronisation; AWGN channels; MLE algorithm; Rayleigh fading channels; maximum likelihood estimation algorithm; maximum ratio combining; mobile radio channels; multipath fading channels; preamble-based OFDM frequency synchronization; selection diversity combining; simulation results; time diversity; AWGN channels; Algorithm design and analysis; Degradation; Diversity methods; Diversity reception; Fading; Frequency estimation; Frequency synchronization; Maximum likelihood estimation; OFDM;
Conference_Titel :
TENCON '02. Proceedings. 2002 IEEE Region 10 Conference on Computers, Communications, Control and Power Engineering
Print_ISBN :
0-7803-7490-8
DOI :
10.1109/TENCON.2002.1180315
