Array signal processing in long-range multimode channels: optimal schemes and effects of the signal coherence and modal noise
Електронний науковий архів Науково-технічної бібліотеки Національного університету "Львівська політехніка"
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Array signal processing in long-range multimode channels: optimal schemes and effects of the signal coherence and modal noise
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| Creator |
Malekhanov, A. I.
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| Subject |
array signal processing
multimode channel coherence signalto-noise ratio modal noise array gain underwater sound channel long-range propagation |
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| Description |
It is well known that long-range signal propagation in random-inhomogeneous channels leads to loss of the signal coherence in space, time and frequency domains. As to large-array signal processing, an intrinsic issue arise if the array size is greater then a signal coherence length (for given distance and frequency band). Such a scenario is typical, for example, for long-range sound propagation in underwater channels. These channels are, in fact, multimode refraction-type waveguides, so the problem is to develop the largearray signal processing techniques under the conditions of coherence-reduced multimode signal against the noise background which contains a rather intensive modal component. In this paper, we consider the problem with emphasis on the optimal processing techniques resulted from the output signal-to-noise ratio criterion. Our focus is interrelated effects of the signal coherence loss and the modal noise (which partially or even completely interferes the modal signal) on the SNR array gain. We give also some results of computer simulation to compare the array processors in long-range underwater environments. |
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| Date |
2010-06-10T08:40:53Z
2010-06-10T08:40:53Z 2009 |
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| Type |
Article
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| Identifier |
Malekhanov A. I. Array signal processing in long-range multimode channels: optimal schemes and effects of the signal coherence and modal noise / A. I. Malekhanov // Теорія та техніка антен : матеріали 7-ї Міжнародної конференції, 9–12 червня 2009 року, Львів, Україна. – Львів : Видавництво Національного університету "Львівська політехніка", 2009. – C. 174–176. – Bibliography: 4 titles.
http://ena.lp.edu.ua:8080/handle/ntb/4521 |
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| Language |
en
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| Publisher |
Видавництво Національного університету "Львівська політехніка"
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