Title :
An underwater acoustic communications scheme with inherent scale diversity for multiple users
Author :
Meng Zhou ; Zhang, J.J. ; Papandreou-Suppappola, A. ; Duman, Tolga M.
Author_Institution :
Sch. of Electr. Comput. & Energy Eng., Arizona State Univ., Tempe, AZ, USA
Abstract :
Wideband underwater acoustic communication channels can cause undesirable multipath and Doppler scaling distortions to propagating acoustic signals. In this paper, we propose to exploit a time-scale canonical representation for wideband time-varying channels to achieve joint multipath-scale diversity. We design a signaling scheme with hyperbolic time-frequency signatures that is matched to the underwater acoustic environment to achieve scale diversity. The signaling scheme, combined with code-division multiple-access, is extended to multiple user transmission to improve multiuser detection performance, as demonstrated with simulations.
Keywords :
Doppler effect; code division multiple access; multipath channels; multiuser detection; signal representation; telecommunication signalling; time-frequency analysis; time-varying channels; underwater acoustic communication; underwater acoustic propagation; Doppler scaling distortion; acoustic signal propagation; code-division multiple-access; hyperbolic time-frequency signature; inherent scale diversity; joint multipath-scale diversity; multipath distortion; multiple user transmission; multiuser detection performance; signaling scheme; time-scale canonical representation; wideband time-varying channel; wideband underwater acoustic communication channel scheme; Chirp; Communication channels; Correlation; Doppler effect; Multiaccess communication; Underwater acoustics; Wideband;
Conference_Titel :
Oceans - San Diego, 2013
Conference_Location :
San Diego, CA