Results 61 to 70 of about 245,084 (285)
MIMO Radar Ambiguity Properties and Optimization Using Frequency-Hopping Waveforms [PDF]
, 2008 The concept of multiple-input multiple-output (MIMO) radars has drawn considerable attention recently. Unlike the traditional single-input multiple-output (SIMO) radar which emits coherent waveforms to form a focused beam, the MIMO radar can transmit ...
Chen, Chun-Yang, Vaidyanathan, P. P.
core +2 more sources
Advanced Functional Materials, EarlyView.High‐energy electron impact in plasma catalysis often causes excessive dissociation of active intermediates, limiting C2+ product selectivity. To address this challenge, a bio‐inspired stoma‐shell nanoarchitecture is designed to decouple electron impact from catalytic reaction zones.
Nan Zou +5 more
wiley +1 more source
IEEE Access, 2018 The integration of radar and communications systems can provide great advantages, such as enhanced efficiency, structure simplification, less occupied hardware resources, and interference mitigation, compared with traditional individual radar and ...
Chenguang Shi +3 more
doaj +1 more source
Closed-Form Waveform Design for MIMO Radar Transmit Beampattern Synthesis via Integral Equality
IEEE Access, 2020 Recently, due to the adequate use of waveform diversity, MIMO technology has been widely adopted, resulting in the waveform design for MIMO radar beampattern synthesis becoming a hot issue. However, most previous works regarding this problem optimize the
Yezi Ma, Ping Wei, Huaguo Zhang, Yan Pan
doaj +1 more source
SSK-Based PSK-LoRa Modulation for IoT Communications
IEEE Open Journal of the Communications Society, 2023 LoRa has been considered as a key enabler for the next generation Internet of Things (IoT) networks. However, the low spectral efficiency (SE) of chirp spread spectrum (CSS) modulation used in LoRa is a fatal drawback for its extensive applications in ...
Quantao Yu +3 more
doaj +1 more source
IA-OPD : an optimized orthogonal pulse design scheme for waveform division multiple access UWB systems [PDF]
, 2019 A new design scheme of orthogonal pulses is proposed for waveform division multiple access ultra-wideband (WDMA-UWB) systems. In order to achieve WDMA and to improve user capacity, the proposed method, termed as interference alignment based orthogonal ...
Chen, Yunfei +4 more
core +1 more source
Advanced Functional Materials, EarlyView.Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah +11 more
wiley +1 more source
IEEE Access, 2015 In this paper, we investigate a friendly spectrally shaped radar waveform design that can be used in a spectral band being utilized by one or more communication systems.
Ric A. Romero, Kevin D. Shepherd
doaj +1 more source
Phase retrieval for radar waveform design
Information and Inference: A Journal of the IMAAbstract The ability of a radar to discriminate in both range and Doppler velocity is completely characterized by the ambiguity function (AF) of its transmit waveform. Mathematically, it is obtained by correlating the waveform with its Doppler-shifted and delayed replicas.
Pinilla, Samuel +3 more
openaire +3 more sources
Broadband, Flexible, Skin‐Compatible Carbon Dots/Graphene Photodetectors for Wearable Applications
Advanced Functional Materials, EarlyView.Broadband, flexible photodetectors integrating nitrogen‐rich carbon dots with single‐layer graphene on plastic substrates are demonstrated. A biocompatible chitosan–glycerol electrolyte enables efficient low‐voltage gating and on‐skin operation. The devices exhibit ultraviolet‐to‐near‐infrared response, mechanical robustness under bending, and verified
Nouha Loudhaief +20 more
wiley +1 more source