Results 31 to 40 of about 18,147 (273)
Wasit Journal of Engineering Sciences, 2019 Phase shift keying modulation approaches are widely used in the communication industry. Differential phase shift keying (DPSK) and Offset Quadrature phase shift keying (OQPSK) schemes are chosen to be investigated is multi environment channels, where ...
Fatima faydhe Al- Azzawi +2 more
doaj +1 more source
All-Optical Regeneration and Format Conversion for 4APSK Signals Based on Nonlinear Effects in HNLF
IEEE Photonics Journal, 2023 An all-optical format conversion and regeneration scheme about 4-ary amplitude and phase shift keying (4APSK) signals is proposed and numerically simulated based on nonlinear effects in the high nonlinear fiber (HNLF).
Qiankun Li +5 more
doaj +1 more source
KNN BASED CLASSIFICATION OF DIGITAL MODULATED SIGNALS
International Islamic University Malaysia Engineering Journal, 2016 Demodulation process without the knowledge of modulation scheme requires Automatic Modulation Classification (AMC). When receiver has limited information about received signal then AMC become essential process. AMC finds important place in the field many
Sajjad Ahmed Ghauri
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Digital coherent receiver for phase modulated radio-over-fibre optical links [PDF]
, 2009 A novel digital signal processing-based coherent receiver for phase-modulated radio-over-fiber (RoF) optical links is presented and demonstrated experimentally.
Jeppesen, Palle +4 more
core +1 more source
IEEE Photonics Journal, 2016 We demonstrate the codesign and cointegration of an ultracompact silicon photonic receiver and a low-power-consumption (155 mW/channel) two-channel linear transimpedance amplifier array.
J. Zhang +10 more
doaj +1 more source
OFDM With Double Quadrature Signed Index Shift Keying
IEEE Access, 2023 Spectral, and energy-efficient, communication is essential for the current and future wireless communication generations. Therefore a novel OFDM with double quadrature signed index shift keying (OFDM-DQSISK) is proposed.
Hany S. Hussein, Mohammed Farrag
doaj +1 more source
IET Optoelectronics, 2009 The performance of a scheme for all-optical regeneration of differential quadrature phase-shift keying (DQPSK) and quadrature phase-shift keying signals using phase-sensitive amplifiers (PSAs) is investigated through numerical simulation. The results show that both phase and amplitude noises of 40 Gb/s RZ-DQPSK signals are significantly suppressed ...
J. Yan, L. An, Z. Zheng, X. Liu
openaire +1 more source
PERFORMANCE ANALYSIS OF MIMO-SPACE TIME BLOCK CODING WITH DIFFERENT MODULATION TECHNIQUES [PDF]
ICTACT Journal on Communication Technology, 2012 MIMO Diversity is the technique which takes the advantage of multipath and mitigates the effect of fading and increases signal strength. Space Time Block code (STBC) is used in Multiple Input Multiple Output (MIMO) system to improve the performance by ...
Shubhangi Chaudhary, A.J. Patil
doaj
Long-haul coherent transmission using a silicon nitride microresonator-based frequency comb as WDM source [PDF]
, 2016 We demonstrated transmission of polarization-multiplexed quadrature phase-shift keying data over 6000 km using a low-noise silicon nitride microresonator frequency comb as light source.
Andrekson, Peter +9 more
core +1 more source
IEEE Photonics Journal, 2016 We propose and experimentally demonstrate an optical modulation format converter from a 25-Gbps quadrature phase-shift keying (QPSK) signal to two 12.5-Gbps binary phase-shift keying (BPSK) signals in a double-pass configuration, which is achieved by ...
Yu-Hsiang Wen, Jia-Wei Ho, Kai-Ming Feng
doaj +1 more source