Performances of multi-element multi-user detection strategies in a shallow-water acoustic network (SWAN)

Hong Kwang Yeo, Bayan S. Sharif, Alan E. Adams, Oliver R. Hinton

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A multi-element receiver strategy is proposed in this paper for a multi-user shallow-water acoustic network (SWAN). The base station receiver, equipped with prior knowledge of the synchronization and training sequences of all intended users, has the task of demodulating the received signals of each user independent of the presence of other users. The adopted receiver strategy enables robust communications through the challenging underwater environment which is limited by both environmental and system factors. The channel is characterized by inter-symbol interference due to multipath propagation and multiple access interference. In this paper, we propose a number of multi-user detection receiver structures employing adaptive decision feed back equalization and spatial diversity to mitigate the effect of these two types of interference. Computer simulations and experimental sea trials conducted in the North Sea in 1999 were used to test the receiver strategies' performance for a two user near far scenario. Amongst a number of strategies tested, the structure based on recursive successive interference cancellation demonstrated improved performance overall.

Original languageBritish English
Pages (from-to)604-611
Number of pages8
JournalIEEE Journal of Oceanic Engineering
Volume26
Issue number4
DOIs
StatePublished - Oct 2001

Keywords

  • Decision feedback equalization
  • Multi-user detection
  • Multiple access interference cancellation

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