Results 141 to 150 of about 1,345 (198)

Intelligent reflective surfaces in 5G and beyond: optimizing uplink satellite connectivity for IoT. [PDF]

PeerJ Comput Sci
Obidiozor CO, Sait A, Al-Hadhrami T, Alkhammash EH, Saeed F.   +4 more
europepmc   +1 more source

Polarization-diversity backscatter communication based on programmable information metasurface. [PDF]

iScience
Luo G, Ma X, Han J, Zhu L, Li R, Liu H, Li L.   +6 more
europepmc   +1 more source

Two-dimensional and high-order directional information modulations for secure communications based on programmable metasurface. [PDF]

Nat Commun
Xu H, Wu JW, Wang ZX, Shao RW, Yang HQ, Cui TJ.   +5 more
europepmc   +1 more source

Quantum Key Distribution with Displaced Thermal States. [PDF]

Entropy (Basel)
Walton A, Ghesquière A, Varcoe BTH.
europepmc   +1 more source

Study of a Crosstalk Suppression Scheme Based on Double-Stage Semiconductor Optical Amplifiers. [PDF]

Sensors (Basel)
Lu X, Ma X, Wu B.
europepmc   +1 more source

Random Frequency Division Multiplexing. [PDF]

Entropy (Basel)
Liu C, Wu J, Zhou Q.
europepmc   +1 more source

Some of the next articles are maybe not open access.

Related searches:

Quadrature-quadrature phase-shift keying

IEEE Transactions on Communications, 1989
Quadrature-quadrature phase-shift keying (Q/sup 2/PSK) is a spectrally efficient modulation scheme which utilizes available signal space dimensions in a more efficient way than two-dimensional schemes such as QPSK and MSK (minimum-shift keying). It uses two date shaping pulses and two carriers, which are pairwise quadrature in phase, to create a four ...
D. Saha, T.G. Birdsall
  +5 more sources

Trellis Coded Quadrature-Quadrature Phase Shift Keying

MILCOM 1987 - IEEE Military Communications Conference - Crisis Communications: The Promise and Reality, 1987
Integrated modulation and coding due to Ungerboeck observed no significant effect of dimensionality of signal space on the coding gain; it appeared unlikely that signals in more than two dimensions could have advantages. In this paper, it is pointed out that the utilization of all available signal space dimensions may bring further improvement in the ...
Fei Wang, Jian Liu, Shuai Wang
openaire   +2 more sources

Synchronization of quadrature-quadrature phase-shift keying signals

IEEE Transactions on Communications, 1992
The key synchronization aspects in the system design of a QQPSK (quadrature-quadrature phase-shift-keying) modem are addressed. The sensitivity of the data demodulator to synchronization errors is discussed, and contextually the performances of some IF and baseband carrier phase and symbol timing recovery schemes are evaluated both theoretically and by
De Gaudenzi, Riccardo, Luise, Marco
openaire   +2 more sources

Wideband acoustic communication using quadrature-phase shift keying and eight-phase shift keying

The Journal of the Acoustical Society of America, 2006
In JAMSTEC, a short-range (up to 500 m) high-speed acoustic communication system for deep sea environment has been investigating. To widen a bandwidth, the new wideband projector was developed. It consists of two transducer elements and has a toroidal beam pattern.
Hiroshi Ochi, Yoshitaka Watanabe, Takuya Shimura   +2 more
openaire   +1 more source