Results 31 to 40 of about 35,695 (318)
Optical vector analysis with attometer resolution, 90-dB dynamic range and THz bandwidth
Nature Communications, 2019 Typical methods for optical vector analysis have tradeoffs among resolution, dynamic range, and bandwidth. The authors use an asymmetric optical probe signal generator and receiver to perform attometer resolution measurement over a THz of bandwidth while
Ting Qing +4 more
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Photonics-Based High-Resolution 3D Inverse Synthetic Aperture Radar Imaging
IEEE Access, 2019 A photonics-based radar for high-resolution 3D microwave imaging is proposed and demonstrated, in which high range resolution is achieved by employing a wideband linearly frequency modulated signal, and high cross-range resolution in both azimuth and ...
Xingwei Ye +4 more
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IET Signal Processing, 2022 A low probability of intercept (LPI)‐based cooperative node selection and transmit resource allocation (CNS‐TRA) strategy is proposed for multi‐target tracking in multiple radars architecture (MRA).
Lintao Ding +3 more
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Sequence Set Design for a New LFM-PC Hybrid Modulated Radar Signal
Sensors, 2021 In this paper we study the code design problem of a new form of linear frequency modulation phase-coded (LFM-PC) hybrid signal with wide Doppler tolerance based on a range-Doppler discrete ambiguity function (DAF) to get better detection performance and ...
Shiyi Li +3 more
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Measurements and analysis of multistatic and multimodal micro-Doppler signatures for automatic target classification [PDF]
, 2014 The purpose of this paper is to present an experimental trial carried out at the Defence Academy of the United Kingdom to measure simultaneous multistatic and multimodal micro-Doppler signatures of various targets, including humans and flying UAVs ...
Marcio Perassoli +5 more
core +1 more source
Joint Transmit Resources and Trajectory Planning for Target Tracking in Airborne Radar Networks
Leida xuebao, 2022 This paper investigates the joint optimization problem of transmit resources and trajectory planning for target tracking in airborne radar networks. First, the analytical expression for the Bayesian Cramér-Rao Lower Bound (BCRLB) with the variables of ...
Chenguang SHI +3 more
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Leida xuebao, 2014 A novel optimal power allocation algorithm for radar network systems is proposed for Low Probability of Intercept (LPI) technology in modern electronic warfare. The algorithm is based on the LPI optimization.
Shi Chen-guang +3 more
doaj +1 more source
Leida xuebao, 2023 The joint optimization problem of transmit power and dwell time of radar for asynchronous multi-target tracking in heterogeneous multiple radar networks with imperfect detection is investigated.
Chenguang SHI +3 more
doaj +1 more source
Ultralow Phase Noise Optoelectronic Oscillator and Its Application to a Frequency Synthesizer
Leida xuebao, 2019 We propose a novel injection-locked OptoElectronic Oscillator (OEO) with ultralow phase noise based on two cascaded phase modulators, which is further applied to construct a frequency synthesizer.
LIU Shifeng +6 more
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Sector imaging radar for enhanced vision [PDF]
Aerospace Science and Technology, 2003 Summary: SIREV (sector imaging radar for enhanced vision) is an innovative airborne radar system which can supply high-quality images in any desired direction under almost every weather condition. In contrast to synthetic aperture radar systems, no relative motion between sensor and targets is required in SIREV.
Krieger, Gerhard +6 more
openaire +1 more source