Results 31 to 40 of about 5,323,059 (392)
Clutter Rejection for FM Ranging Airborne Radar [PDF]
Journal of Electromagnetic Engineering and Science, 2023 In airborne radar, it is important to reject clutter signals to detect targets of interest. High pulse repetition frequency (HPRF) waveform provides robust detection performance in a clutter environment by separating clutter signals from the target echo ...
Ji Hwan Yoon, Yongmin Kim
doaj +1 more source
Simple photonics-based system for Doppler frequency shift and angle of arrival measurement.
Optics Express, 2020 A novel photonic approach for simultaneously measuring both the Doppler frequency shift (DFS) and the angle of arrival (AOA) of a microwave signal in a radar system is presented.
Chongjia Huang, Hao Chen, E. Chan
semanticscholar +1 more source
Measurement-based analysis of Doppler characteristics for ultra-wideband radio channels in an office environment [PDF]
, 2014 In this work, an analysis of the Doppler characteristics for Ultra-Wideband indoor communication is presented. Channel sounding measurements ranging from 3.1 to 10.6 GHz were performed over the course of several days in an occupied office environment ...
Hanssens, Brecht +4 more
core +1 more source
IEEE Transactions on Vehicular Technology, 2020 Mobile-to-mobile channels often exhibit time-variant Doppler frequency shifts due to the movement of transmitter and receiver. An accurate description of the Doppler frequency turns out to be very difficult in Cartesian coordinates and any subsequent ...
M. Walter +4 more
semanticscholar +1 more source
A function of time, frequency, lag, and Doppler [PDF]
IEEE Transactions on Signal Processing, 1999 In signal processing, four functions of one variable are commonly used. They are the signal in time, the spectrum, the auto-correlation function of the signal, and the auto-correlation function of the spectrum. The variables of these functions are denoted, respectively, as time, frequency, lag, and Doppler.
J.C. O'Neill, W.J. Williams
openaire +1 more source
Joint 2D DOA and Doppler frequency estimation for L-shaped array using compressive sensing
Journal of Systems Engineering and Electronics, 2020 : A joint two-dimensional (2D) direction-of-arrival (DOA) and radial Doppler frequency estimation method for the L-shaped array is proposed in this paper based on the compressive sensing (CS) framework.
Shixin Wang +5 more
semanticscholar +1 more source
High-sensitive acquisition method of GPS signal based on iridium assistance
The Journal of Engineering, 2019 Global positioning system (GPS) signal is severely attenuated in indoor, urban, and forest environments. To capture weak GPS signal, long-time coherent integration and non-coherent integration are used to increase signal to noise ratio (SNR).
Hao Zihuan, Zhang Lei
doaj +1 more source
Photonic superdiffusive motion in resonance line radiation trapping - partial frequency redistribution effects [PDF]
, 2007 The relation between the jump length probability distribution function and the spectral line profile in resonance atomic radiation trapping is considered for Partial Frequency Redistribution (PFR) between absorbed and reemitted radiation. The single line
A. R. Alves-Pereira +18 more
core +2 more sources
Normal Doppler Frequency Shift in Negative Refractive‐Index Systems [PDF]
Laser & Photonics reviews, 2019 Besides the well‐known negative refraction, a negative refractive‐index material can exhibit another two hallmark features, which are the inverse Doppler effect and backward Cherenkov radiation.
Xiao Lin, Baile Zhang
semanticscholar +1 more source
Storage of Doppler-Shift Information in the Echolocation System of the "CF-FM"-Bat, Rhinolophus ferrumequinum [PDF]
, 1976 The greater horseshoe bat (Rhinolophus ferrumequinum) emits echolocation sounds consisting of a long constant-frequency (CF) component preceeded and followed by a short frequency-modulated (FM) component. When an echo returns with an upward Doppler-shift,
Schuller, Gerd, Suga, Nobuo
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