Title :
An Implementation of Time and Frequency Synchronization for Carrier Interferometry of OFDM in an Underwater Acoustic Channel
Author :
Fang, Hui ; Hu, Xiaoyi ; Xu, Ru
Author_Institution :
Key Lab. of Underwater Acoust., Commun. & Marine Inf. Technol., Xiamen, China
Abstract :
Considering the features of Underwater Acoustic channel and the sensitivity versus synchronization for CI/OFDM system, A time and frequency synchronization method based on Constant Amplitude Zero Auto-Correlation(CAZAC) sequence is presented. The time offset estimation and carrier frequency offset estimation can be achieved simultaneously. The fractional part and integral part of carrier offset estimation can be respectively got by the correlation result of time offset estimation and cyclic correlation principle. The efficacy of the synchronization algorithms is demonstrated experimentally.
Keywords :
OFDM modulation; correlation methods; frequency estimation; interferometry; synchronisation; underwater acoustic communication; CI/OFDM system; carrier frequency offset estimation; carrier interferometry; constant amplitude zero autocorrelation sequence; cyclic correlation principle; frequency synchronization; time offset estimation; time synchronization; underwater acoustic channel; Autocorrelation; Circuits; Frequency estimation; Frequency synchronization; Information technology; Interferometry; Laboratories; OFDM modulation; Underwater acoustics; Underwater communication; CAZAC sequence; CI/OFDM; Frequency offset estimation; Time offset estimation; UWA channel;
Conference_Titel :
Circuits, Communications and Systems, 2009. PACCS '09. Pacific-Asia Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-0-7695-3614-9
DOI :
10.1109/PACCS.2009.27
