Timing and delay spread estimation scheme in OFDM systems

Author

Wen, Jyh-horng ; Lee, Shu-Hong ; Lee, Gwo-Ruey ; Chang, Jin-Tong

Author_Institution

Dept. of Electr. Eng., Tunghai Univ., Taichung

Volume

54

Issue

2

fYear

2008

fDate

5/1/2008 12:00:00 AM

Firstpage

316

Lastpage

320

Abstract

In this paper, a scheme for symbol timing estimation and delay spread estimation using subblock correlation is proposed in the OFDM systems. The subblock correlation between the cyclic prefix and data symbol is applied to estimate symbol timing and the length of delay spread. Under a multipath fading channel referred to the OFDM multipath channel model in the standard of IEEE 802.11a/g WLAN, the results show that performance with the proposed scheme is better than that with Beek´s scheme. In addition, the length of the delay spread could be estimated in the proposed scheme. Hence, in order to increase the bandwidth efficiency, the length of cyclic prefix could be adaptively assigned in the OFDM system.

Keywords

OFDM modulation; delay estimation; fading channels; multipath channels; timing; wireless LAN; IEEE 802.11a/g; OFDM systems; WLAN; cyclic prefix; data symbol; delay spread estimation; orthogonal frequency division multiplexing technique; subblock correlation; timing estimation; AWGN; Bandwidth; Correlators; Delay estimation; Digital video broadcasting; Frequency synchronization; OFDM; Timing; Wireless LAN; Wireless communication;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2008.4560092

Filename

4560092