Temat: forcing - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Impact of reflecting land surface on radiation environment over Hornsund, Spitsbergen – a model study for cloudless skies
Autorzy:: Rozwadowska, Anna
Górecka, Izabela
Powiązania:: https://bibliotekanauki.pl/articles/2046763.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: aerosol radiative forcing
Arctic
fjord
irradiance transmittance
Monte Carlo modelling
nadir radiance
Svalbard
Źródło:: Polish Polar Research; 2017, 38, 2; 149-174
0138-0338
2081-8262
Pojawia się w:: Polish Polar Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Sea ice regime in the Kara Sea during 2003–2017 based on high-resolution satellite data
Autorzy:: Duan, Chenglin
Dong, Sheng
Wang, Zhifeng
Powiązania:: https://bibliotekanauki.pl/articles/2041857.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Arctic
ice regime
spatio-temporal variation
ice coverage anomaly index
atmospheric forcing factor
correlation analysis
Źródło:: Polish Polar Research; 2019, 40, 3; 205-225
0138-0338
2081-8262
Pojawia się w:: Polish Polar Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Investigation of VBLAST Equalization Technique for Underwater Acoustic Communications
Autorzy:: Pranitha, B.
Anjaneyulu, L.
Minh, Hoa
Aslam, Nauman
Kumar, Sandeep V.
Powiązania:: https://bibliotekanauki.pl/articles/227284.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: underwater acoustic communication (UWAC)
multiple input multiple output (MIMO)
zero-forcing (ZF)
vertical-Bell laboratories layered space-time (VBLAST)
Opis:: Underwater Acoustic Communications (UWAC) is an emerging technology in the field of underwater communications, and it is challenging because of the signal attenuation of the sound waves. Multiple Input and Multiple- Output (MIMO) is introduced in UWAC because of its support in enhancing the data throughput even under the conditions of interference, signal fading, and multipath. The paper presents the concept and analysis of 2 × 2 MIMO UWAC systems that uses a 4 - QAM spatial modulation scheme thus minimizing the decoding complexity and overcoming the Inter Channel Interference (IChI). Bit Error Rate (BER) investigation is carried out over different link distances under acoustic Line of Sight (LOS). The utilization of Zero Forcing (ZF) and Vertical-Bell Laboratories Layered Space-Time (VBLAST) equalizers, which estimates the transmitted data proves a success of removing Inter Symbol Interference (ISI). The ISI caused due to multipath effect and scattering in UWAC can be reduced by iterative process considered in VBLAST. A study is made on how the distance between the transmitter and the receiver and the Doppler Effect has its impact on the performance of the system.
Źródło:: International Journal of Electronics and Telecommunications; 2020, 66, 2; 331-337
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: FPGA Implementation of Sphere Detector for Spatial Multiplexing MIMO System
Autorzy:: Mohamed, Asma
Zekry, Abdel Halim
Ibrahim, Reem
Powiązania:: https://bibliotekanauki.pl/articles/963839.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: multiple input multiple output (MIMO)
Spatial Multiplexing(SM)
zero-forcing (ZF)
Minimum Mean Square Estimator (MMSE)
Sorted QR Decomposition (SQRD)
Sphere Decoder (SD)
Opis:: Multiple Input Multiple Output (MIMO (techniques use multiple antennas at both transmitter and receiver for increasing the channel reliability and enhancing the spectral efficiency of wireless communication system.MIMO Spatial Multiplexing (SM) is a technology that can increase the channel capacity without additional spectral resources. The implementation of MIMO detection techniques become a difficult mission as the computational complexity increases with the number of transmitting antenna and constellation size. So designing detection techniques that can recover transmitted signals from Spatial Multiplexing (SM) MIMO with reduced complexity and high performance is challenging. In this survey, the general model of MIMO communication system is presented in addition to multiple MIMO Spatial Multiplexing (SM) detection techniques. These detection techniques are divided into different categories, such as linear detection, Non-linear detection and tree-search detection. Detailed discussions on the advantages and disadvantages of each detection algorithm are introduced. Hardware implementation of Sphere Decoder (SD) algorithm using VHDL/FPGA is also presented.
Źródło:: International Journal of Electronics and Telecommunications; 2019, 65, 2; 245-252
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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