Results 1 to 10 of about 362,427 (261)

Motion Parameter Identification and Motion Compensation for Shipborne HFSWR by Using the Reference RF Signal Generated at the Shore [PDF]

open access: yesRemote Sensing, 2020
The shipborne high-frequency surface wave radar (HFSWR) platform produces six degrees of freedom (DOF) motion at sea, which affects the performance of radar target detection and remote sensing of ocean surface dynamics parameters. Motion compensation can
Di Zhu   +5 more
doaj   +2 more sources

A Motion Compensation Method for Shipborne HFSWR by Using Dual Reference RF Signals Generated Onshore [PDF]

open access: yesRemote Sensing, 2022
The echo of shipborne high-frequency surface wave radar (HFSWR) is modulated by six-degrees-of-freedom (6-DOF) motion, affecting the detection of the target and the remote sensing of ocean surface dynamics parameters.
Maorong Chen   +6 more
doaj   +2 more sources

A Photonic Dechirp-on-Receive Pulse Synthetic Aperture Radar Using a Phase Correlated Optical Reference Signal in a DSP-Based Optical Coherent Receiver

open access: yesIEEE Access, 2021
A pulse radar based on photonics-assisted signal generation and stretch processing is proposed and experimentally demonstrated. A radio frequency (RF) linear frequency modulated (LFM) pulse signal is generated by photonic frequency doubling from an ...
Zhenwei Mo   +4 more
doaj   +1 more source

Ultrastable Long-Haul Fiber-Optic Radio Frequency Transfer Based on Dual-PLL

open access: yesIEEE Photonics Journal, 2021
In this paper, we demonstrate ultrastable radio-frequency (RF) transfer over long-haul optical fiber link. Our stabilized RF transfer technique is based on high-performance dual phase locked loops (dual-PLL) configuration which improves signal to noise ...
Chenxia Liu   +8 more
doaj   +1 more source

Reproducing system-level bulk current injection test in direct power injection setup for multiple-port DUTs [PDF]

open access: yesAdvances in Radio Science, 2013
Many investigations have been published on the transferability of RF immunity test results between system and IC-levels. The RF signal level at DUT (Device under Test) inputs, i.e.
S. Miropolsky, S. Frei
doaj   +1 more source

Stable Radio Frequency Transmission of Single Optical Source Over Fiber Based on Passive Phase Compensation

open access: yesIEEE Photonics Journal, 2021
In this paper, we propose a stable radio frequency(RF) transmission scheme for optical link based on Dual drive Mach-Zehnder modulator(DDMZM).
Chen Hu   +5 more
doaj   +1 more source

Developing RF Power Sensor Calibration Station in Direct Comparison Transfer System using Vector Network Analyzer

open access: yesJournal of Telecommunications and Information Technology, 2021
Calibration of RF power sensors is crucial issue in RF power measurements. Many calibration laboratories use the direct comparison transfer system with a signal generator and a power splitter.
Jarosław Szatkowski
doaj   +1 more source

Real-time high-bandwidth mm-wave 5G NR signal transmission with analog radio-over-fiber fronthaul over multi-core fiber

open access: yesEURASIP Journal on Wireless Communications and Networking, 2021
This article presents an experimental demonstration of a high-capacity millimeter-wave 5G NR signal transmission with analog radio-over-fiber (ARoF) fronthaul over multi-core fiber and full real-time processing.
Simon Rommel   +15 more
doaj   +1 more source

Non-Steady State NMR Effect and Application on Time-Varying Magnetic Field Measurement

open access: yesSensors, 2022
The measurement of a time-varying magnetic field is different from a constant magnetic field, due to its field intensity variation with time. Usually, the time-varying magnetic field measurement converts the solution of the magnetic induction intensity ...
Xiaohu Zeng   +4 more
doaj   +1 more source

Radio Frequency Database Construction and Modulation Recognition in Wireless Sensor Networks

open access: yesSensors, 2022
Current modulation recognition methods in wireless sensor networks rely too much on simulation datasets. Its practical application effect cannot reach the expected results.
Kun Liu, Xin Xiang, Liyan Yin
doaj   +1 more source

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