Project:

Shallow Water Acoustic Network (SWAN)

From December 1997 to November 2000
Project Leader(s): Prof. O.R. Hinton
Contact: Oliver.Hinton@ncl.ac.uk
Sponsors: EC/MAST

Summary

The objective is to advance shallow-water coherent communication networking techniques, and in particular to achieve high reliability, fast self-start capability in the absence of training sequnces and self-recovery in the event of unexpected communication breakdown. The project concerns the investigation of innovative solutions for the basic building block of a communication network, that is an array receiver. In the project the same band for transmission and reception and the same coherent signalling waveforms are adopted in each network node to achieve a high transmission rate. The only distinctive features of the distorted replicas of different transmitter signals in the receivers are the respective channel responses and underlying data sequences. These features are exploited in the processing to achieve mesaage separation in the presence of the multiple access interface.

Results and Field Trials

Below is shown the experimental set-up used in practical field trials of the techniques developed in this project.

[ field trails diagram ][ field trails diagram ]

Conclusions

  • Proposed RSIC structures offer robust performance for a various channel geometries
  • RSIC MUD improves estimation of both weak and strong users
  • Proposed RLS algorithm achieves fast convergence with improved tracking

Staff

Professor Oliver Hinton
Faculty Pro-Vice-Chancellor for SAgE

Professor Bayan Sharif
Head of School