Results 11 to 20 of about 281,646 (345)

Doppler estimation and compensation method for underwater target active detection based on communication signal

open access: yesXibei 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

open access: yesGeodesy 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

Simplified Doppler Frequency Shift Measurement Enabled by Serrodyne Optical Frequency Translation [PDF]

open access: yesIEEE Microwave and Wireless Components Letters, 2022
9 pages, 6 figures, 1 ...
Yang Chen, Taixia Shi
openaire   +2 more sources

Main-lobe jamming cancellation for multi-static radar by joint range-Doppler processing

open access: yesThe 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]

open access: yes, 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
core   +1 more source

Modelling, Analysis, and Simulation of the Micro-Doppler Effect in Wideband Indoor Channels with Confirmation Through Pendulum Experiments

open access: yesSensors, 2020
This paper is about designing a 3D no n-stationary wideband indoor channel model for radio-frequency sensing. The proposed channel model allows for simulating the time-variant (TV) characteristics of the received signal of indoor channel in the presence ...
Ahmed Abdelgawwad   +2 more
doaj   +1 more source

Spectral and temporal gating mechanisms enhance the clutter rejection in the echolocating bat, Rhinolophus rouxi [PDF]

open access: yes, 1991
Doppler shift compensation behaviour in horseshoe bats, Rhinolophus rouxi, was used to test the interference of pure tones and narrow band noise with compensation performance.
Neumann, Ingrid, Schuller, Gerd
core   +1 more source

Moving Target Simulation of Multi-Band Radar Based on Doppler Frequency Signal Generation Technology [PDF]

open access: yesRadioengineering, 2023
This paper proposes a corner reflector and Luneburg ball reflector group. The omnidirectional radar cross-sectional (RCS) distribution characteristics of a fighter are simulated using the sharp and smooth RCS distribution features of the corner and the ...
J. Hao, X. Wang, X. Sun, H.n Gao, L. Zou
doaj  

Analysis of phase noise influence on micro-Doppler feature extraction of vibrating target

open access: yesThe Journal of Engineering, 2019
It is generally considered that increasing the carrier frequency of radar is an important way to improve the precision of micro-motion measurement. However, the increase of the radar frequency may raise the phase noise intensity of the radar transmitting
Zihao Liu, Bo Peng, Xiang Li
doaj   +1 more source

A new method for Synthetic Impulse and Aperture Radar transmitting waveform design based on non‐sequential positive, negative and random carrier frequency coding with dot product approach

open access: yesIET Radar, Sonar & Navigation, 2022
Synthetic Impulse and Aperture Radar (SIAR) is a kind of Multiple Input Multiple Output (MIMO) radar. It is a four‐dimensional radar that has advantages against stealth targets, multi targets, anti‐radiated missile, reconnaissance and interference, as ...
Pourya Yaghoubi Aliabad   +2 more
doaj   +1 more source

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