Results 21 to 30 of about 4,109,115 (314)
IEEE Access, 2021 In this paper we address hybrid probabilistic-geometric constellation shaping (HCS) of amplitude phase shift keying (APSK) constellation based on the reversed model of optimal companding quantization for circularly symmetric sources with the goal to ...
Aleksandra Z. Jovanovic +3 more
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Mutual Interference of Automotive OFDM Radars—Analysis and Countermeasures
IEEE Journal of Microwaves, 2021 Due to its noise-like signal property, digital orthogonal frequency-division multiplexing (OFDM) radars are often assumed to be robust against interference.
Benedikt Schweizer +4 more
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Large-signal dynamics of an ultrafast semiconductor laser at digital modulation rates approaching 10 Gbit/s [PDF]
, 1985 High-fidelity pseudorandom digital modulation at 8.2 Gbit/s of an ultrahigh speed semiconductor laser is demonstrated. Studies using simple but representative pulse patterns at 10 Gbit/s give insights into the maximum digital modulation rate attainable ...
Lau, K. Y., Yariv, A.
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Sensors, 2023 An air gap is a technique that increases the security of information systems. The use of unconventional communication channels allows for obtaining communication that is of interest to the attacker as well as to cybersecurity engineers.
Przemyslaw Mazurek, Dawid Bak
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Automotive Radar — From First Efforts to Future Systems
IEEE Journal of Microwaves, 2021 Although the beginning of research on automotive radar sensors goes back to the 1960s, automotive radar has remained one of the main drivers of innovation in millimeter wave technology over the past two decades.
Christian Waldschmidt +2 more
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Low power all-digital radio-over-fiber transmission for 28-GHz band using parallel electro-absorption modulators [PDF]
, 2020 We present a low-power all-digital radio-over-fiber transmitter for beyond 28-GHz using sigma-delta modulation, a 140mW NRZ driver and parallel electro-absorption modulators. 5.25Gb/s (2.625Gb/s) 64-QAM is transported over 10-km SSMF at 1560nm with 7.6% (
Bauwelinck, Johan +12 more
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Particle Swarm Optimization-Based Deep Neural Network for Digital Modulation Recognition
IEEE Access, 2019 Modulation recognition is a major task in many wireless communication systems including cognitive radio and signal reconnaissance. The diversification of modulation schemes and the increased complexity of the channel environment put higher requirements ...
Wenzhe Shi +4 more
semanticscholar +1 more source
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
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Enhancing the Dynamic Range of OFDM Radars Using Non-Linear Operation and Symbol-Based Equalization
IEEE Journal of Microwaves, 2023 Due to the increased flexibility in terms of waveform generation, digitally-modulated radar systems are gaining increasing popularity among research and academia.
Rossen Michev +3 more
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A study of discrete wavelet transform based denoising to reduce the effect of artificial light interferences for indoor optical wireless communication [PDF]
, 2010 The optical power penalty (OPP) due to the artificial light interferences (ALIs) can be significantly high in an indoor optical wireless communication (OWC) channel making such link practically infeasible.
Angelova, Maia +2 more
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