Analysis of the performance of an underwater acoustic communications system and comparison with a stochastic model

Galvin, R.; Coates, R.

doi:10.1109/oceans.1994.364245

Cited by 21 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[8][9][10] The second approach uses differently coherent detection and relies on array processing to eliminate multipath arrivals. 4 It focuses on the use of transmitter arrays to excite only a single path of propagation. Equalization is not used, since the shallow water channel is considered exhibiting too rapid Rayleigh fading for an adaptive equalizer to follow.…”

Section: Introductionmentioning

confidence: 99%

Sweep-spread carrier for underwater communication over acoustic channels with strong multipath propagation

Кебкал¹,

Bannasch

2002

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

Multipath propagation causes the transmitted signal to take numerous, time-varying different-length paths to the receiver. Exploitation of conventional frequency-constant carrier signals for communication over underwater acoustic channels typically shows that intricate mutual time variations of multipath arrivals create an extremely hard problem for equalizers to compensate for nonstable intersymbol interactions. Communication over such channels can be, however, substantially improved by using a new method based on the implementation of a sweep-spread carrier (S2C). Such a carrier consists of a succession of sweeps, which cause permanent rapid fluctuation of signal frequency. Apart from some additional useful effects such as providing multiuser access and reducing influence of narrow-band noise, the method provides significant processing improvement enabling clear separation of multipath arrivals by converting their time delays into their frequency reallocations--the steeper the sweeps, the better the multipath resolution that can be achieved. When converting the signal into constant intermediate frequencies, the best suitable multipath arrival can be separated not as traditionally in time domains, applying complex equalizers, but in frequency domains by means of usual band-pass filters. High transmission stability of this approach was confirmed in both computer simulations as well as in validation experiments carried out since summer 1999.

show abstract

Section: Introductionmentioning

confidence: 99%

Sweep-spread carrier for underwater communication over acoustic channels with strong multipath propagation

Кебкал¹,

Bannasch

2002

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

show abstract

“…In [7], a simple stochastic channel model is proposed and no experimental results are presented. Moreover, the model does not include acoustic propagation physics, e.g., spreading and absorption.. An underwater acoustic channel based on Rice fading model is introduced in [8] where there can be several propagation paths named Eigen paths and the Poisson distribution is used to represent the number of Eigen paths reaching a receiver.…”

Section: Related Workmentioning

confidence: 99%

Comprehensive Study of Acoustic Channel Models for Underwater Wireless Communication Networks

Anandalatchoumy¹,

Sivaradje²

2015

IJCI

View full text Add to dashboard Cite

show abstract

“…Attempts have been made in the past to design communication systems which use array processing to explicitly suppress multipath (14,161. These designs have relied on specific propagation models, on the basis of ray theory and the theory of normal modes (4), for predicting the multipath configuration.…”

Section: Receiver Design: Current Techniques and Obstaclesmentioning

confidence: 99%

A channel subspace post-filtering approach to adaptive equalization

Nadakuditi¹

2002

View full text Add to dashboard Cite

Analysis of the performance of an underwater acoustic communications system and comparison with a stochastic model

Cited by 21 publications

References 5 publications

Sweep-spread carrier for underwater communication over acoustic channels with strong multipath propagation

Sweep-spread carrier for underwater communication over acoustic channels with strong multipath propagation

Comprehensive Study of Acoustic Channel Models for Underwater Wireless Communication Networks

A channel subspace post-filtering approach to adaptive equalization

Contact Info

Product

Resources

About