An effective synchronization scheme for NC-OFDM systems in cognitive radio context

Author

Huang, Biao ; Wang, Jun ; Tang, Wanbin ; Li, Shaoqian

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2010

fDate

Aug. 28 2010-Sept. 3 2010

Firstpage

1

Lastpage

4

Abstract

In this paper, a simple and effective synchronization scheme for NC-OFDM systems is proposed. To keep the autocorrelation in the scenario of subcarriers deficiency, the preamble is consists of two identical pseudo-noise (PN) sequences instead of ZC sequences. Coarse timing estimation and fractional CFO(carrier frequency offset) estimation are completed according to the correlation between the received preamble and the known PN sequence. Simulations validate the feasibility from the aspects of timing synchronization probability and CFO´s mean square error (MSE).

Keywords

OFDM modulation; cognitive radio; mean square error methods; synchronisation; MSE; NC-OFDM system; carrier frequency offset; cognitive radio; fractional CFO estimation; mean square error; noncontiguous orthogonal frequency division multiplexing; pseudonoise sequences; subcarrier deficiency; timing synchronization; Correlation; Delay; Estimation; OFDM; Signal to noise ratio; Synchronization;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Information Technology and Systems (ICWITS), 2010 IEEE International Conference on

Conference_Location

Honolulu, HI

Print_ISBN

978-1-4244-7091-4

Type

conf

DOI

10.1109/ICWITS.2010.5611980

Filename

5611980