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Experimental Assessment of Adaptive Spatial Combining for Underwater Acoustic Communications

Authors:
Guosong Zhang
Jens M. Hovem
Hefeng Dong

Keywords: adaptive spatial combining; passive time reversal; passive-phase conjugation; underwater communication;spatial diversity

Abstract:
This paper presents a receiver structure of passive-phase conjugation (PPC) based adaptive spatial combining for underwater acoustic communications. Based on temporal diversity exploited by PPC processing, the presented structure exploits spatial diversity by adaptive multichannel combining. The structure was assessed in two field experiments which were conducted in two different seasons in Trondheim harbor. The experiments were carried out with the same configuration, but the channel physics were different due to different environmental conditions. A cross receiving array of 10 hydrophones, deployed in a water depth of 10 m, was used to collect the received waveform in a range of 2.0 km. By off-line signal processing, we have demonstrated the superior performance in exploiting spatial diversity for underwater communications.

Pages: 178 to 183

Copyright: Copyright (c) IARIA, 2011

Publication date: August 21, 2011

Published in: conference

ISSN: 2308-4405

ISBN: 978-1-61208-144-1

Location: Nice/Saint Laurent du Var, France

Dates: from August 21, 2011 to August 27, 2011