Results 11 to 20 of about 5,323,059 (392)
Improved Sensitivity RF Photonics Doppler Frequency Measurement System
IEEE Photonics Journal, 2016 An improved sensitivity Doppler frequency measurement system based on microwave photonics technology was demonstrated practically. The system employs a four-wave mixing effect to achieve broad radio-frequency (RF) frequency measurement.
H. Emami, M. Hajihashemi, S. E. Alavi
semanticscholar +2 more sources
New delay Doppler communication paradigm in 6G era: A survey of orthogonal time frequency space (OTFS) [PDF]
China Communications, 2022 In the 6G era, Space-Air-Ground Integrated Network (SAGIN) are anticipated to deliver global coverage, necessitating support for a diverse array of emerging applications in high-mobility, hostile environments.
W. Yuan +6 more
semanticscholar +1 more source
Joint Doppler Frequency and Direction of Arrival Estimation for TDM MIMO Automotive Radars
IEEE Journal on Selected Topics in Signal Processing, 2021 This paper considers a novel approach to joint estimation of the velocity (or Doppler frequency) and Direction of Arrival (DOA) of targets by time division multiplexing (TDM) multiple-input multiple-output (MIMO) radars in automotive applications.
Ashwin Bhobani Baral, M. Torlak
semanticscholar +1 more source
A Radar Detection Method of Plasma-Sheath-Covered Target Based on the Improved Keystone Algorithm
Remote Sensing, 2022 The aerodynamic thermal ionization affects the re-entry target, and the surface will form a ‘plasma sheath (PSh).’ The PSh with fluid characteristics will produce relative motion with the re-entry target.
Bowen Bai +3 more
doaj +1 more source
, 2021 The necessity of estimating the decrease in the accuracy of measuring the informative parameters of a radar signal in real conditions of its propagation and reflection has been substantiated.
S. Yevseiev +9 more
semanticscholar +1 more source
Xibei Gongye Daxue Xuebao, 2021 The integration of underwater detection and communication uses communication signals to detect a target actively, but the Doppler effect deteriorates the parameter estimation performance of the integrated system. To eliminate the influence of the Doppler
LU Jun +3 more
doaj +1 more source
The Doppler effect induced by earthquakes: A case study of the Wenchuan MS8.0 earthquake
Geodesy and Geodynamics, 2022 Seismologists have found that the first arrival frequencies of P waves at different seismic stations have different widths, that is, different periods or frequencies, and they think that this phenomenon can be used to identify whether a Doppler effect is
Qicheng Li +3 more
doaj +1 more source
High frequency ultrasound with color Doppler in dermatology [PDF]
Anais Brasileiros de Dermatologia, 2016 Ultrasonography is a method of imaging that classically is used in dermatology to study changes in the hypoderma, as nodules and infectious and inflammatory processes. The introduction of high frequency and resolution equipments enabled the observation of superficial structures, allowing differentiation between skin layers and providing details for the
Barcaui, Elisa de Oliveira +4 more
openaire +6 more sources
Main-lobe jamming cancellation for multi-static radar by joint range-Doppler processing
The Journal of Engineering, 2019 It is well-known that the noise jamming impedes the mission effectiveness of radar systems. It raises the level of the background and swamps out target returns.
Meng Jinli, Wang Ning
doaj +1 more source
Hearing Characteristics and Doppler Shift Compensation in South Indian CF-FM Bats [PDF]
, 1980 1. Echolocation pulses, Doppler shift compensation behaviour under laboratory conditions and frequency response characteristics of hearing were recorded inRhinolophus rouxi, Hipposideros speoris andHipposideros bicolor. 2.
A. Brosset +13 more
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