Title :
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
fDate :
Aug. 28 2010-Sept. 3 2010
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;
Conference_Titel :
Wireless Information Technology and Systems (ICWITS), 2010 IEEE International Conference on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-7091-4
DOI :
10.1109/ICWITS.2010.5611980
