Title :
A new frequency synchronization algorithm in the TDS-OFDM systems
Author :
Dai, Ling-Long ; Fu, Jian ; Wang, Jun ; Yang, Zhi-Xing ; Alaniz, Arthur
Author_Institution :
Electron. Eng. Dept., Tsinghua Univ., Beijing, China
Abstract :
This paper proposes a new frequency synchronization algorithm based on alternating guard intervals in the TDS-OFDM system. It utilizes the following two facts: the maximum length of identical sequences exist in the alternating guard intervals in the TDS-OFDM system and high precise frequency estimation can be achieved by extending the equivalent length of the delay for autocorrelation in the conventional frequency synchronization algorithm. The variance of the frequency estimation over a typical DTTB multi-path channel in the proposed algorithm is dramatically decreased from 10-8 , in the conventional algorithm, to 10-13. The proposed algorithm is also robust against timing errors as verified by the simulation results. In addition, much lower hardware complexity can be achieved.
Keywords :
OFDM modulation; digital video broadcasting; frequency estimation; multipath channels; synchronisation; TDS-OFDM systems; digital television terrestrial broadcasting; equivalent length; frequency estimation; frequency synchronization; hardware complexity; multipath channel; time domain synchronous; Autocorrelation; Delay estimation; Digital TV; Digital communication; Frequency estimation; Frequency synchronization; OFDM; Robustness; TV broadcasting; Timing;
Conference_Titel :
Communication Systems, 2008. ICCS 2008. 11th IEEE Singapore International Conference on
Conference_Location :
Guangzhou
Print_ISBN :
978-1-4244-2423-8
Electronic_ISBN :
978-1-4244-2424-5
DOI :
10.1109/ICCS.2008.4737140
