Temat: amplitude-phase modulation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Radio Photonic Systems for Measurement of Instantaneous Radio Frequency with Amplitude-phase Modulation of Optical Carrier
Autorzy:: Morozov, O. G.
Nasybullin, A. R.
Vedenkin, D. A.
Agliullin, T. A.
Powiązania:: https://bibliotekanauki.pl/articles/958054.pdf
Data publikacji:: 2016
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: amplitude-phase modulation
transformation
fiber Bragg grating (FBG)
instantaneous frequency
radio photonics
Opis:: In this article questions related to the development instantaneous radio frequency measurement system based on application in them original ways of the amplitude-phase modulation transformation of single-frequency optical carrier by a radio signal in symmetric two-frequency and measuring “frequency-amplitude” transformation in fiber Bragg grating with special profile are considered. Such systems have broad prospects for use in telecommunications, military systems and for environmental monitoring.
Źródło:: Journal of Telecommunications and Information Technology; 2016, 2; 103-107
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A Soft-Output STBC Decoder for Aeronautical Telemetry
Autorzy:: Louёt, Yves
Othman, Rami
Skrzypczak, Alexandre
Powiązania:: https://bibliotekanauki.pl/articles/309130.pdf
Data publikacji:: 2020
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: continuous-phase modulation
CPM
pulse amplitude modulation
PAM
shaped oﬀset quadrature phase shift keying
SOQPSK
space-time block coding
STBC
ternary symbol
Opis:: Alamouti encoding is a well-known space time block encoding technique used to improve the received signal quality in Rayleigh fading channels. In aeronautical telemetry, this encoding technique is applied to shaped oﬀset quadrature phase shift keying tier generation (SOQPSK-TG) modulation in order to handle the two-antenna issue. It is provided for in telemetry-related IRIG standards. In this paper, we propose a unique decoding architecture for Alamouti-encoded SOQPSK-TG signals, taking advantage of pulse amplitude modulation decomposition with soft and hard outputs. We exploit this result to obtain a Viterbi algorithm (VA) for hard decoding and a soft output Viterbi algorithm (SOVA) for soft and hard decoding, with a twofold beneﬁt: operation using one trellis structure, unlike decoders that are based on the 8-waveforms cross-correlated trellis-coded quadrature modulation (XTCQM) approximation, and very attractive bit error rate performance, as well as a complexity trade-oﬀ.
Źródło:: Journal of Telecommunications and Information Technology; 2020, 1; 13-20
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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