Title :
A cyclostationary blind Doppler estimation method for underwater acoustic communications using direct-sequence spread spectrum signals
Author :
Cotae, Paul ; Yang, T.E.
Author_Institution :
Electr. Eng. Dept., Univ. of the District of Columbia, Washington, DC, USA
Abstract :
A new method for blind (non-data aided) Doppler shift estimation caused by relative motion assumed to be the same on each hydrophone receiver in a SIMO context is presented. The proposed method is based on the second order stationary statistics and it was applied to estimate the average and instantaneous Doppler shift for a single carrier underwater acoustic communications. Past experimental data collected at sea are used to determine the average and instantaneous Doppler shift within a direct sequence spread spectrum signal containing 52 repeated m-sequences.
Keywords :
Doppler shift; blind source separation; m-sequences; spread spectrum communication; underwater acoustic communication; SIMO context; cyclostationary blind Doppler shift estimation method; direct-sequence spread spectrum signals; hydrophone receiver; second order stationary statistics; underwater acoustic communications; Acoustic propagation; Baseband; Context; Covariance matrix; Doppler shift; Frequency synchronization; Multiaccess communication; Spread spectrum communication; Underwater acoustics; Underwater communication; Blind Doppler estimation; cyclostationarity; direct sequence spread spectrum; msequence; non data aided synchronization; underwater communications;
Conference_Titel :
Communications (COMM), 2010 8th International Conference on
Conference_Location :
Bucharest
Print_ISBN :
978-1-4244-6360-2
DOI :
10.1109/ICCOMM.2010.5509047
