Results 11 to 20 of about 19,589 (169)

An integrated single-shot spectrometer with large bandwidth-resolution ratio and wide operation temperature range

open access: yesPhotoniX, 2023
There has been a rapidly growing demand for low-cost, integrated single-shot spectrometers to be embedded in portable intelligent devices. Even though significant progress has been made in this area, two major problems are still remaining, namely the ...
Ang Li   +6 more
doaj   +1 more source

Microwave Photonic Array Radars

open access: yesIEEE Journal of Microwaves, 2021
Phased array radars have remarkable advantages over radars with single-element antenna in terms of agility, flexibility, robustness, and reconfigurability.
Shilong Pan   +3 more
doaj   +1 more source

Anti-Error Robust Pattern Synthesis Algorithm in Time-Modulated Array Antenna

open access: yesIEEE Access, 2022
Compared with the traditional antenna array, the time-modulated array can increase the flexibility of the array by adding time switches. However, due to the introduction of time switches, the time-modulated array antenna is more sensitive to random ...
Yuanjin Tian   +5 more
doaj   +1 more source

Flexible Frequency-Hopping Microwave Generation by Dynamic Control of Optically Injected Semiconductor Laser

open access: yesIEEE Photonics Journal, 2016
Under proper optical injection, period-one (P1) dynamics of an optically injected semiconductor laser can be excited by undamping the relaxation resonance of the semiconductor through Hopf bifurcation.
Pei Zhou   +4 more
doaj   +1 more source

Sequence Set Design for a New LFM-PC Hybrid Modulated Radar Signal

open access: yesSensors, 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
doaj   +1 more source

Optical vector analysis with attometer resolution, 90-dB dynamic range and THz bandwidth

open access: yesNature 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
doaj   +1 more source

Photonics-Based High-Resolution 3D Inverse Synthetic Aperture Radar Imaging

open access: yesIEEE 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
doaj   +1 more source

Collaborative transmit resource scheduling and waveform selection for target tracking in multistatic radar system

open access: yesIET Radar, Sonar & Navigation, 2021
This paper proposes a collaborative transmit resource scheduling and waveform selection (CTRSWS) strategy for target tracking in multistatic radar system which consists of one transmitter and an arbitrary number of receivers.
Yijie Wang   +3 more
doaj   +1 more source

Joint Transmit Resources and Trajectory Planning for Target Tracking in Airborne Radar Networks

open access: yesLeida 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
doaj   +1 more source

Low probability of intercept‐based cooperative node selection and transmit resource allocation for multi‐target tracking in multiple radars architecture

open access: yesIET 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
doaj   +1 more source

Home - About - Disclaimer - Privacy