Evaluation of underwater acoustic channel capacity in conjunction with application of sweep-spread carrier signals

Кебкал, К.Г.; Kebkal, A.; Bannasch, R.

doi:10.1109/oceanse.2007.4302255

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…Для реалізації засобів ГА зв'язку найбільш доцільним є використання цифрового зв'язку на основі фазової модуляції (наприклад метод КФМ, що обрано в експерименті) з розширенням спектру за допомогою частотної модуляції по лінійному закону [8,10,12]. Цей метод зарекомендував себе, як такий, що забезпечує найбільш високу швидкість і достовірність передачі даних через гідроакустичний канал в складних умовах мілкого моря [1,2,5,8,12].…”

Section: висновокunclassified

Experimental realization of digital sonar communication

Hladkih¹

2014

Electronics and Communications

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Section: висновокunclassified

Experimental realization of digital sonar communication

Hladkih¹

2014

Electronics and Communications

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A stochastic model of a received underwater acoustic signal in shallow water

Burdinskiy

Karabanov

Linnik

et al. 2015

2015 International Siberian Conference on Control and Communications (SIBCON)

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Modelling and validation of basic characteristics in underwater acoustic sweep-spread-carrier communications

Кебкал¹,

Kebkal²,

Kebkal³

et al. 2015

2015 IEEE Underwater Technology (UT)

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The deployment of underwater acoustic modems was designed to investigate the various effects of underwater acoustic channel onto propagation of hydro-acoustic signals and thus onto performance of hydro-acoustic data link. Data represented sequences of QPSK signals spread over broad frequency band (18-34 kHz) using sweep-spread carrier (S2C) technology. Transmissions were conducted with data rates between 1 and 20 kbps. Underwater acoustic channels were of a horizontal geometry with water depths between 8 and 22 m. There were selected two transmission distances between 328 m and 437 m. Data obtained from the deployment included modem performance statistics for over 2 days, channel impulse response for each data packet transmitted, estimations of Doppler impairments of received signals, noise levels, and sound velocity profiles measured two times a day. Communication and channels statistics were collected for two-way transmissions (interrogations). By means of channel probing the transfer function of underwater acoustic environment was repeatedly recorded and directly compared with the result obtained using channel simulations. This provided the possibility of a "prediction" of the modem performance in a channel with given characteristics. Predictions of the experimental performance over time were obtained using underwater acoustic simulator based on the Bellhop model. Simulator was progressively updated with settings of actual environmental parameters including sound velocity profile, bottom profile and its acoustic properties, as well as surface and bottom roughness. Comparison with the measured statistics demonstrated a reasonable agreement. The simulated performance did not correlate well with measured data when considering only the short-term fluctuations. Nevertheless, the simulation demonstrated an effective method for obtaining predictions of modem performance with flexibility, what would allow in further steps of modem developments for the implementation of additional features. (Abstract)

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Evaluation of underwater acoustic channel capacity in conjunction with application of sweep-spread carrier signals

Cited by 3 publications

References 3 publications

Experimental realization of digital sonar communication

Experimental realization of digital sonar communication

A stochastic model of a received underwater acoustic signal in shallow water

Modelling and validation of basic characteristics in underwater acoustic sweep-spread-carrier communications

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