Results 161 to 170 of about 10,809 (212)

Plasmonic modulator enabling kilometer-range high-throughput sub-THz links for radio access networks. [PDF]

Nat Commun
Vukovic B, Kulmer L, Blatter T, Horst Y, Destraz M, Heni W, Koepfli SM, Ibili H, Baumann M, Fedoryshyn Y, Smajic J, Luciano S, Leuthold J.   +12 more
europepmc   +1 more source

Channel quality predictions assisted by new algorithms for high throughput satellite and 5G systems. [PDF]

Sci Rep
Al-Saegh AM, Ali EM, Abdalrazak MQ, Elmunim NA, Alibakhshikenari M, Virdee BS, Abbasi NA, Chaudhary MA, Kouhalvandi L, Elwi TA, Livreri P, Saber T.   +11 more
europepmc   +1 more source

AI-Driven Adaptive Communications for Energy-Efficient Underwater Acoustic Sensor Networks. [PDF]

Sensors (Basel)
Rehman AU, Galluccio L, Morabito G.
europepmc   +1 more source

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Comparison Between PS-QPSK and PDM-QPSK With Equal Rate and Bandwidth

IEEE Photonics Technology Letters, 2012
Polarization-switched quadrature phase-shift keying (PS-QPSK) is a recently introduced 4-D signal constellation that has a power efficiency (and sensitivity) advantage over polarization-division multiplexed QPSK (PDM-QPSK). Using a polarization-rotated form of PS-QPSK, we show that it is equivalent to a short block code, and assert that basic ...
Brian Krongold
exaly   +2 more sources

QPSK Transmitter Based on Optical Amplitude Modulation of Electrically Generated QPSK Signal

Asia Optical Fiber Communication and Optoelectronic Exposition and Conference, 2008
An optical QPSK transmitter based on optical amplitude modulation of an electrical QPSK signal with subsequent optical filtering is demonstrated with 10.7 Gbaud (21.4 Gbit/s) RZ-DQPSK data.
Bengt-Erik Olsson, Mats Sköld
core   +3 more sources

Generation and Detection of 28 Gbaud Polarization Switched-QPSK in WDM Long-Haul Transmission Systems

Journal of Lightwave Technology, 2012
We report on an experimental long-haul transmission of a 28 Gbaud PS-QPSK signal in WDM scenarios. This report presents, to the authors’ knowledge, a novel implementation of an optical coherent receiver for the polarization-switched quadrature phase ...
Haïk Mardoyan, Jeremie Renaudier, Massimiliano Salsi   +2 more
exaly   +2 more sources

QPSK, Staggered QPSK, and MSK--A Comparative Evaluation

IEEE Transactions on Communications, 1983
Bandwidth- and power-efficient quadrature carrier modulation techniques are identified, evaluated, and compared. The modulation techniques include quadrature phase shift keying (QPSK), staggered QPSK (SQPSK), and minimum (frequency) shift keying (MSK). High quality QPSK, SQPSK, and MSK transmitters and receivers were used in the evaluation, along with ...
Mark C. Austin, Ming U. Chang, Daniel F. Horwood, Robert A. Maslov   +3 more
openaire   +2 more sources

The Effects of Filtering and Limiting on the Performance of QPSK, Offset QPSK, and MSK Systems

IEEE Transactions on Communications, 1980
The effects on spectral densities, symbol waveshapes and P e versus S/N performances, resulting from the addition of filtering followed by hard limiting on raised cosine filtered QPSK, offset QPSK, and MSK point-to-point radio systems are studied. A mathematical model and physical insight are presented into the crosstalk phenomenon between quadrature ...
Douglas H. Morais, Kamilo Feher
openaire   +2 more sources

RF pulse shaping for QPSK, PM-QPSK and QAM formats

Frontiers in Optics 2013, 2013
We propose and evaluate the performance of a novel RF pulse against rectangular pulse for three modulation formats: QPSK, PM-QPSK, and Star 16 QAM. The proposed pulse shows BER improvement by over an order of magnitude even for large phase and pre-amplifier noise.
Mukund Anandan, Ankita Jain, Syed Tajammul Ahmad, K. Pradeep Kumar   +3 more
openaire   +1 more source