Title :
Improvement on the Synchronization Algorithm for OFDM
Author :
Li, Ming ; Chen, Jian ; Kuo, Yonghong
Author_Institution :
Sch. of Telecommun. Eng., Xidian Univ., Xi´´an, China
Abstract :
Time and frequency synchronization is one of the most important tasks in an OFDM system. An improved adaptive synchronization algorithm is proposed in this paper. It combines the advantages of both decreasing step-size and constant step-size algorithms, meanwhile, a bidirectional search method is introduced into the new algorithm to accelerate the tracking speed. Simulation results show that the new algorithm has a better performance in convergence speed and precision, while its computational cost is almost changeless.
Keywords :
OFDM modulation; search problems; synchronisation; time-frequency analysis; tracking; OFDM system; adaptive synchronization algorithm; bidirectional search method; computational cost; constant step-size algorithm; convergence speed; decreasing step-size algorithm; time-frequency synchronization algorithm; tracking speed; Approximation algorithms; Computational efficiency; DSL; Digital video broadcasting; Frequency estimation; Frequency synchronization; OFDM; Signal processing algorithms; Stochastic processes; Timing;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5305852