Results 31 to 40 of about 504,913 (304)
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
PLoS ONE, 2020 This research aims to analyze the effects of different parameter estimation on the recognition performance of satellite modulation signals based on deep learning (DL) under low signal to noise ratio (SNR) or channel non-ideal conditions.
Hui Li, Ming Li
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Spectrum to distance mapping via nonlinear Airy pulses [PDF]
, 2013 We theoretically and experimentally study the phenomena related to self-phase modulation of Airy pulses in fibers. During nonlinear evolution, most spectral components of the Airy pulses concentrate into one or two peaks for normal and anomalous ...
Azana, Jose +7 more
core +2 more sources
Modulation Instability and Phase-Shifted Fermi-Pasta-Ulam Recurrence [PDF]
Scientific Reports, 2016 AbstractInstabilities are common phenomena frequently observed in nature, sometimes leading to unexpected catastrophes and disasters in seemingly normal conditions. One prominent form of instability in a distributed system is its response to a harmonic modulation.
Kimmoun, O. +11 more
openaire +10 more sources
Solving Doppler-Angle Ambiguity of BPSK-MIMO FMCW Radar System
IEEE Access, 2021 In a multiple-input multiple-output (MIMO) radar system, binary phase-shift keying (BPSK) modulation is widely used to separate signals transmitted from multiple transmit (Tx) antennas.
Jaehoon Jung +3 more
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Ultrasonic Modulation of Coherent Light in Raman–Nath Diffraction
IEEE Photonics Journal, 2018 This paper analyzes the ultrasonic modulation of coherent light in Raman–Nath acousto-optic diffraction. We find that the frequency shifts of the diffracted light cause the periodic variation of the ultrasound-modulated light intensity with time ...
Weng Cuncheng, He Youwu
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An Energy-Synchronous Direct Antenna Modulation Method for Phase Shift Keying
IEEE Open Journal of Antennas and Propagation, 2020 A novel scheme for transmitting broadband phase shift keyed signals from electrically small antennas using energy-synchronous direct antenna modulation is described. We outline fundamental operating principles of the method and experimentally compare its
Kurt Schab +2 more
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A Survey on Robust Modulation Requirements for the Next Generation Personal Satellite Communications
Frontiers in Communications and Networks, 2022 The unrelenting technological advancement in the generation of wireless networks in recent years has awakened the motion concerning the inclusion of satellites in personal communications.
Julius Ssimbwa +3 more
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A Low-Complexity Detector for Memoryless Polarization-Multiplexed Fiber-Optical Channels [PDF]
, 2013 A low-complexity detector is introduced for polarization-multiplexed M-ary phase shift keying modulation in a fiber-optical channel impaired by nonlinear phase noise, generalizing a previous result by Lau and Kahn for single-polarization signals.
Agrell, Erik +5 more
core +2 more sources
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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