Title :
Synchronization and Doppler scale estimation with dual PN padding TDS-OFDM for underwater acoustic communication
Author :
Zhenrui Chen ; Zheng, Y.R. ; Jintao Wang ; Jian Song
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
We propose a joint synchronization and Doppler scale estimation method with time domain synchronous orthogonal frequency division multiplexing (TDS-OFDM) for underwater acoustic communication. Dual frequency-domain pseudo-random noise (PN) sequences serve as training sequences for synchronization and channel estimation. Frame synchronization, carrier frequency offset (CFO) estimation and Doppler scale estimation are obtained simultaneously by two-dimensional auto-correlations of received signals. Theoretical analyses and computer simulations show that the proposed method is suitable for synchronization and Doppler scale estimation, even in the presence of long delay spread and significant Doppler effects.
Keywords :
Doppler effect; OFDM modulation; acoustic correlation; channel estimation; frequency estimation; frequency-domain analysis; random noise; random sequences; synchronisation; time-domain analysis; underwater acoustic communication; CFO estimation; Doppler effect; Doppler scale estimation method; PN training sequence; carrier frequency offset estimation; channel estimation; dual PN padding TDS-OFDM; dual frequency-domain pseudorandom noise sequence; time domain synchronous orthogonal frequency division multiplexing; two-dimensional autocorrelation; underwater acoustic communication; Doppler effect; Estimation; Multipath channels; Noise measurement; OFDM; Synchronization; Underwater acoustics;
Conference_Titel :
Oceans - San Diego, 2013
Conference_Location :
San Diego, CA
