Results 21 to 30 of about 5,337,605 (357)
On the Communication Performance of Airborne Distributed Coherent Radar
Applied Sciences, 2022 Compared with a monostatic radar, airborne distributed coherent radar (ADCR) has been widely applied thanks to its flexibility, greater degree of freedom, stronger detection, and anti-jamming ability.
Qinhao Wu +3 more
doaj +1 more source
Detecting and estimating coherence based on coherence witnesses [PDF]
Physical Review A, 2021 Quantum coherence has wide-ranging applications from quantum thermodynamics to quantum metrology, quantum channel discrimination and even quantum biology. Thus, detecting and quantifying coherence are two fundamental problems in quantum resource theory.
Zhao Ma +4 more
openaire +2 more sources
Ambient OFDM Pilot-Aided Backscatter Communications: Concept and Design
IEEE Access, 2021 This paper investigates a backscatter communications system that exploits ambient pilot symbols used in existing standards based on orthogonal frequency-division multiplexing (OFDM), such as IEEE802.11, in order to realize ultra-low power communications ...
Takanori Hara +2 more
doaj +1 more source
Towards quantum-limited coherent detection of terahertz waves in charge-neutral graphene [PDF]
Nature Astronomy, 2019 Spectacular advances in heterodyne astronomy1,2 have been largely due to breakthroughs in detector technology3. To exploit the full capacity of future terahertz (∼300 GHz–5 THz) telescope space missions4, new concepts of terahertz coherent receivers are ...
S. Lara‐Avila +10 more
semanticscholar +1 more source
CPFSK Signal Detection in White and Bursty Impulsive Noises
IEEE Access, 2019 Designing communication techniques for non-Gaussian impulsive noise has been attracting considerable attention from the research community. In this paper, we focus on the continuous phase frequency shift keying (CPFSK) signal detection for both white and
Guosheng Yang +4 more
doaj +1 more source
WRFRFT-based coherent detection and parameter estimation of radar moving target with unknown entry/departure time [PDF]
Signal Processing, 2019 A moving target may enter a radar coverage area unannounced and leave after an unspecified period, which implies that the target's entry time and departure time are unknown.
Xiaolong Li +5 more
semanticscholar +1 more source
Homodyne coherent detection of ASK and PSK signals performed by a subcarrier optical phase-locked loop [PDF]
, 2005 Optical transmission systems based on homodyne coherent detection of 2-ASK and pilot carrier 2-PSK signals have been implemented. ASK data has been transmitted at 2.5 Gbps, while 2.5 Gbps and 10 Gbps PSK systems have been tested.
S. Camatel +4 more
core +1 more source
Journal of Marine Science and Engineering, 2023 Detection of underwater coherent interference is necessary as its presence affects the estimation of the desired target. In this work, a method based on high-order particle velocity gradient polarization characteristics is proposed to distinguish the ...
Di Wu, Lanyue Zhang, Jia Wang, Xueru Hu
doaj +1 more source
Detection of coherence-disrupting and coherence-conferring alterations in text [PDF]
Memory & Cognition, 1985 In a study phase, subjects were presented with sentence pairs which were either coherent or anomalous. In a subsequent recognition test, each sentence pair was presented either in its original form or with one word changed. The changed word either disrupted the coherence of a previously coherent sentence pair or conferred coherence on a previously ...
J J, Bharucha, K L, Olney, P P, Schnurr
openaire +2 more sources
Silicon–plasmonic integrated circuits for terahertz signal generation and coherent detection [PDF]
Nature Photonics, 2018 Optoelectronic signal processing offers great potential for generation and detection of ultra-broadband waveforms in the terahertz range (so-called T-waves). However, fabrication of the underlying devices still relies on complex processes using dedicated
T. Harter +6 more
semanticscholar +1 more source