Decision-directed passive phase conjugation: equalisation performance in shallow water

Decision-directed passive phase conjugation: equalisation performance in shallow water

A decision-directed extension to passive phase conjugation array demodulation is described. Initialisation by a training preamble is followed by block least-squares channel estimation via conjugate gradient and memoryless decisions, which are used by estimation in the next block. An excellent shallo...

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Veröffentlicht in:Electronics letters 2001-12, Vol.37 (25), p.1-1
Hauptverfasser: Flynn, J A, Ritcey, J A, Fox, W L J, Jackson, D R, Rouseff, D
Format: Artikel
Sprache:eng
Schlagworte:
Arrays
Blocking
Channels
Demodulation
Least squares method
Phase conjugation
Shallow water
Tracking
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Zusammenfassung:A decision-directed extension to passive phase conjugation array demodulation is described. Initialisation by a training preamble is followed by block least-squares channel estimation via conjugate gradient and memoryless decisions, which are used by estimation in the next block. An excellent shallow-water performance is shown at ranges up to 4.6 km under windy conditions and shipping noise. The algorithm demonstrates low error rate and robust channel tracking.
ISSN:0013-5194
1350-911X