Title :
A proposed joint timing and frequency synchronization method for IEEE 802.16 OFDM systems
Author :
Xiao-dong, Yang ; Yue-qian, Wang ; Zheng, Dou ; Lin-lin, Feng
Author_Institution :
Coll. of Inf. & Commun. Eng., Harbin Eng. Univ., Harbin, China
Abstract :
Orthogonal frequency division multiplexing (OFDM) systems are sensitive to time and frequency offset errors. In this paper, a method of joint timing and frequency synchronization for OFDM systems has been proposed based on preamble structure defined in IEEE 802.16 standard. The proposed method in coarse frame detection has good robustness and anti-noise ability. The coarse and fine frequency offset estimations are achieved by choosing different preamble symbol in time domain, which reduces computational complexity. For fine timing synchronization, a method of averaging over two peak values is proposed to improve timing precision, which reduces disadvantages of frequency offset and channel decline. Theoretical analysis and simulation results demonstrate that the proposed joint synchronization method can provide accurate synchronization and appropriate complexity.. thus that method is an optimization method of joint synchronization for IEEE 802.16 OFDM systems.
Keywords :
OFDM modulation; WiMax; computational complexity; optimisation; synchronisation; IEEE 802.16; OFDM systems; WiMax certification; computational complexity; frequency synchronization; optimization; orthogonal frequency division multiplexing; timing synchronization; AWGN; Computational complexity; Educational institutions; Frequency division multiplexing; Frequency estimation; Frequency synchronization; Interference; OFDM modulation; Robustness; Timing; IEEE 802.16; OFDM; joint timing and frequency synchronization;
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.2008.4737138