Results 91 to 100 of about 18,596 (191)
Applied Sciences, 2018 The satellite-to-ground optical communication system suffers from atmosphere turbulence severely. It is well-known that the coherent detection can increase the receiver sensitivity and performing aperture averaging can reduce the scintillation caused by ...
Hongwei Li +5 more
doaj +1 more source
On the performance of SU-MIMO and MU-MIMO in 3GPP LTE downlink [PDF]
, 2009 LTE (Long Term Evolution) is a next major step in mobile radio communications, and will be introduced as Release 8 in the 3rd Generation Partnership Project (3GPP). The new evolution aims to reduce delays, improve spectrum flexibility and reduce cost for
Beh, KC +5 more
core +1 more source
IEEE Access, 2019 The integration of satellite and terrestrial 5G networks aims to provide ubiquitous coverage, improve service reliability, and enable the network scalability.
Wenjin Wang +5 more
doaj +1 more source
Development of an advanced nano-satellite (VELOX-IV) : ground station
, 2016 The Satellite Research Centre (SaRC) in NTU has successfully launched six satellites since 2011. To communicate with these satellites in orbit, there are two ground stations; one at NTU Block S2 which uses the UHF and VHF amateur radio band for ...
Lai, Xingjie
core
, 2010 The downlink minimum bit error rate (MBER) transmit beamforming is directly designed based on the uplink MBER receive beamforming solution for time division duplex (TDD) space-division multiple-access (SDMA) induced multiple-input multiple-output (MIMO ...
Yang, Lie-Liang, Chen, Sheng
core
Quantum BER estimation modelling and analysis for satellite‐based quantum key distribution scenarios
IET Quantum CommunicationThe quantum communication channel is considered to be eavesdropped when the signal Quantum Bit Error Rate (QBER) exceeds a defined theoretical limit and is thus considered a figure of merit parameter for assessing the security of a quantum channel.
Abhishek Khanna +3 more
doaj +1 more source
Recent field experiments with commercial satellite imagery direct downlink
, 2017 US Pacific Command's strategy includes assistance to United States government relief agencies and nongovernment organizations during humanitarian aid and disaster relief operations in the Asia-Pacific region. Situational awareness during these operations
Samuel H. Amber, PhD +1 more
core +1 more source
, 2012 Pointing, Acquisition and Tracking (PAT)-systems are one of the central parts of a Laser Communication Terminal. In Laser Communication Terminals a staggered PAT-system consisting of Coarse Pointing Assembly (CPA) and Fine Pointing Assembly (FPA) is ...
Schmidt, Christopher, Horwath, Joachim
core
IEEE AccessAgainst the backdrop of the widespread deployment of 5G systems and humanity’s entry into a new era of sixth-generation mobile communication, countries are now turning their attention to exploring uncharted territories through satellite ...
Yifeng Jin +5 more
doaj +1 more source
, 2021 Low downlink data rates limit the scientific and commercial return from small satellites. Now with constellations of small satellites becoming popular, the amount of data generated in low Earth orbit will be greater than ever.
van 't Hof, Jos (author)
core