Measurements of Doppler and delay spreading of communication signals in medium depth and shallow underwater acoustic channels
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Recent measurements of Doppler and delay spreading of underwater acoustic communication signals are presented for 84m and 14m deep marine environments off the coast of Perth, Western Australia. The data-sets are being utilised to develop a computer model of the transient Doppler and delay spreading effects of surface waves. The work supports the on-going development of a dynamic underwater acoustic communication channel simulator to assist the testing of modems and signalling strategies in varied conditions in a cost-effective manner.
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Investigation of underwater acoustic multi-path Doppler and delay spreading in a shallow marine environmentCaley, Michael; Duncan, Alec (2013)Doppler frequency spreading and arrival delay spreading of underwater acoustic communication signals under the influence of surface waves and transmitter-receiver motion were investigated in a channel probing experiment ...
Caley, Michael; Duncan, Alexander (2011)The underwater acoustic communication channel is characterised by transient signal fading across multiple propagation paths and much greater time spread between first and last arrivals than in terrestrial wireless systems. ...
A high-resolution underwater acoustic communication propagation simulator with multi-path transient sea-surface interactionsCaley, M.; Duncan, Alec (2015)A channel simulation has been developed to explore the fine time-scale Doppler and multi-path arrival-time delay spreading imparted to underwater communication signals by interaction with the transient ocean surface. The ...