Wszystkie pola: transmission properties - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Transmission properties of a shallow hydroacoustic channel
Autorzy:: Kochańska, I.
Lasota, H.
Mazurek, R.
Adamczyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/332175.pdf
Data publikacji:: 2004
Wydawca:: Polskie Towarzystwo Akustyczne
Opis:: Multiple acoustic wave reflections on environment boundaries significantly reduce transmission capacity of shallow hydroacoustic channels. The use of BNM channel model being among the results of the international research project PROSIM developed within the framework of the MAST-III initiative, allowed to calculate the channel impulse response functions and perform a simulation of a digital signal transmission. This article presents the results of test transmission of binary FSK and PSK signals in a sample channel.
Źródło:: Hydroacoustics; 2004, 7; 121-128
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Measurements of transmission properties of acoustic communication channels
Autorzy:: Kochańska, I.
Lasota, H.
Powiązania:: https://bibliotekanauki.pl/articles/331858.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Akustyczne
Opis:: Tough transmission properties of shallow water acoustic channels (SWAC) highly limit the use of underwater acoustic communication (UAC) systems. An adaptive matching of modulation and signaling schemes to instantaneous channel conditions is needed for reliable data communications. This creates, however, unique challenges for designers when compared to radio transmission systems. When communication system elements are in move, the accuracy of both the measurements of channel impulse responses and estimates of transmission characteristics is strongly limited, due to rapid variations of the channel performance. This paper describes communication tests of a model of the orthogonal frequency division multiplexing (OFDM) data transmission system. developed by the authors. The measurement procedures and signal processing algorithms were, first, tested in reverberant air-acoustic channels available in the laboratory, and, next, verified in natural conditions in a lake. The air acoustics trials prove to be effective and methodically correct.
Źródło:: Hydroacoustics; 2012, 15; 91-98
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Adaptive identification of time-varying impulse response of underwater acoustic communication channel
Autorzy:: Kochańska, I.
Powiązania:: https://bibliotekanauki.pl/articles/332081.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: transmission properties
time-varying impulse response
Kalman filter
Opis:: The transmission properties of underwater acoustic communication channel can change dynamically due to the movement of acoustic system transmitter and receiver or underwater objects reflecting transmitted signal. The time-varying impulse response measurement and estimation are necessary to match the physical layer of data transmission to instantaneous channel propagation conditions. Using the correlative measurement method, impulse response estimate can be obtained no more than the duration of the measurement sequence. The paper proposes a joint correlative measurement and adaptive filtration approach, applying the Kalman filter algorithm to increase the time-domain resolution of the time-varying impulse response estimation.
Źródło:: Hydroacoustics; 2015, 18; 87-94
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

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