Temat: komunikacja akustyczna - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Synchronization system for underwater acoustic communications using in shallow waters
Autorzy:: Schmidt, Jan H.
Schmidt, Aleksander M.
Powiązania:: https://bibliotekanauki.pl/articles/24201990.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:: synchronization system
underwater acoustic communications
shallow water
układy synchronizacji
akustyczna komunikacja podwodna
wody płytkie
Opis:: A reliable synchronization system of the transmitted data frame has a significant impact on the efficiency of the underwater communication system. This applies in particular to communication systems dedicated to work in shallow waters, where the phenomenon of multipath permanently occurs. To overcome these difficulties, the concept of a synchronization system consisting of two broadband signals of opposite monotonicity was presented. The method of receiving these signals has been described in detail. The stochastic channel model with Rician fading and the Watermark simulator was used to test the efficiency of the synchronization system in the underwater multipath channel.
Źródło:: Vibrations in Physical Systems; 2023, 34, 1; art. no. 2023102
0860-6897
Pojawia się w:: Vibrations in Physical Systems
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Performance of coherent modulation scheme used in acoustic underwater communication system
Autorzy:: Schmidt, Jan H.
Schmidt, Aleksander M.
Kochańska, Iwona
Powiązania:: https://bibliotekanauki.pl/articles/127757.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:: underwater acoustic communications
shallow underwater channel
coherent modulation
akustyczna komunikacja podwodna
płytki kanał podwodny
modulacja koherentna
Opis:: The development of an acoustic underwater communication system for shallow waters is still a big scientific and construction challenge. Currently, non-coherent modulations in combination with strong channel coding are used to achieve reliable communication with low rate in such a channel. To obtain transmission with a higher transmission rate, it is required to use coherent modulation. This paper presents the assumptions of such a transmission system and the results of data transmission carried out by this system in the channel with the Rician fading, which reflects the short range shallow water channel. A digital version of the carrier phase modulation known as Phase-Shift Keying was selected for simulation.
Źródło:: Vibrations in Physical Systems; 2019, 30, 1; 1-8
0860-6897
Pojawia się w:: Vibrations in Physical Systems
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Underwater acoustic communication system using broadband signal with hyperbolically modulated frequency
Autorzy:: Schmidt, Jan H.
Schmidt, Aleksander M.
Powiązania:: https://bibliotekanauki.pl/articles/2146694.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:: underwater acoustic communication
shallow water
hyperbolic modulation frequency signals
akustyczna komunikacja podwodna
wody płytkie
hiperboliczna modulacja sygnałów częstotliwościowych
Opis:: The implementation of reliable acoustic underwater communication in shallow waters is a scientific and engineering challenge, mainly due to the permanent occurrence of the multipath phenomenon. The article presents the concept of a transmission system using a broadband signal with hyperbolically modulated frequency (HFM) to transmit data symbols and synchronize data frames. The simulation tests were carried out in channels with Rician fading, reflecting the short- and medium-range shallow water channels. The simulation also took into account the presence of additive Gaussian noise in the channel on the functioning of the receiver. The obtained results prove the high reliability of the underwater communication system based on broadband HFM signals.
Źródło:: Vibrations in Physical Systems; 2021, 32, 1; art. no. 2021116
0860-6897
Pojawia się w:: Vibrations in Physical Systems
Dostawca treści:: Biblioteka Nauki

Artykuł

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