Results 91 to 100 of about 10,809 (212)

RF testing of QPSK device

, 2004
The concepts of RF testing of a QPSK device are introduced and followed by the presentation of the simulation results of a common RF tests involving a Quadrature Phase Shift Keying (QPSK) modulator and demodulator.​Master of Science (Communications ...
Chan, Siew Meng.
core  

Monte Carlo Estimation of PDM-QPSK/OOK and DQPSK/OOK Hybrid Systems Tolerance against Nonlinear Effects

, 2009
We compare through Monte Carlo simulations the performance of polarization-division multiplexed quadrature phase-shift keying (PDM-QPSK)/on–off keying (OOK) and differential QPSK (DQPSK)/OOK hybrid systems, taking into account nonlinear phase noise ...
ROSSI, Nicola, SERENA, Paolo, BERTOLINI M, BONONI, Alberto   +3 more
core   +1 more source

Symbol Error Rate Performance Analysis of RQAM with Channel Prediction and Joint Transceiver Diversity [PDF]

Jisuanji gongcheng, 2018
In order to solve the design problem of predictive Transmit Antenna Selection(TASP)/receive antenna Maximum Ratio Combining (MRC) wireless communication system with the Minimum Mean Square Error(MMSE) Wiener channel prediction,the exact and approximate ...
LI Debing,LI Guangqiu,JIN Xufeng
doaj  

Linear and Nonlinear Crosstalk Tolerance of Polarization-Switched QPSK and Polarization-Multiplexed QPSK [Elektronisk resurs]

, 2011
The OSNR requirements and linear crosstalk tolerance of PS-QPSK and PM-QPSK are investigated, as well as the transmission performance in the presence of 10 Gbit/s neighboring OOK ...
Sjödin, Martin E,, Johannisson, Pontus,, Karlsson, Magnus,, Andrekson, Peter,   +3 more
core  

Análisis del desempeño de los esquemas de modulación BPSK y QPSK para diferentes condiciones de canales en sistema GFDM

Maskay, 2018
Hoy en día, las redes de comunicación inalámbricas han aumentado sustancialmente el número de información de transmisión. Por lo tanto, es necesario el desarrollo de nuevas tecnologías que satisfagan esta demanda en los mercados.
Randy Verdecia Peña
doaj   +1 more source

Влияние аддитивного белого гауссовского шума на спектральную плотность QPSK [PDF]

, 2020
В статье представлены распределение мощности по полосе частот аддитивного белого гауссовского шума, спектральная плотность мощности QPSK и моделирование спектрального плотности мощности ...
Ку, Х. Н.
core   +1 more source

QPSK FWM signal conversion

Bit Error Ratio Raw measurements for the idler signal for BPSK and QPSK signals
Lacava, Cosimo, Cristiani, Ilaria, Petropoulos, Periklis, Ettabib, Mohamed, Richardson, David, Fedeli, Jean-Marc   +5 more
core   +1 more source

Data-Aided Carrier Recovery with QPSK Modulation

Buletinul Ştiinţific al Academiei Trupelor de Uscat, 2019
Digital communication has proven to be the most efficient method of data transmission especially where long distances are involved. This led to the invention of more sophisticated methods of communication ranging from mobile handset communication to more
Al-Rawi Muhanned
doaj   +1 more source

Single photodiode-based direct detection for Twin-SSB-QPSK signal in optical fiber communication systems

Tongxin xuebao
To address the high-cost issue of twin single sideband quadrature phase shift keying (Twin-SSB-QPSK) signals in optical transmission, a optical fiber communication system was proposed, in which a single photodetector (PD) was employed at the receiver to ...
ZHANG Hongbo, LIU Jiao, LING Weiwei, ZHANG Min, WAN Feng, CAI Ju   +5 more
doaj   +2 more sources

Ultra-long-haul transmission of 7×42.9Gbit/s PS-QPSK and PM-BPSK

, 2011
We report on ultra-long haul transmission of polarization-switched QPSK (PS-QPSK) and polarization-multiplexed BPSK (PM-BPSK) at 42.9Gbit/s per WDM channel.
David S. Millar, Sergejs Makovejs, Domaniç Lavery, Thomsen, BC, ,, Polina Bayvel, Killey, RI, Makovejs, S, Benn C. Thomsen, Millar, DS, Robert I. Killey, Savory, SJ, Seb J. Savory, Lavery, D, Bayvel, P, Carsten Behrens, Behrens, C   +16 more
core   +1 more source