Results 61 to 70 of about 4,161,881 (190)

Estimation of Rice Factor Ratio for Doubly Selective Fading Channels

open access: yesIEEE Access, 2020
In wireless communication systems, Rice factor ratio (RFR) defined as K/(1 + K) is a key parameter not only to evaluate the quality of communication channel since it can reveal the severity of the small-scale fading, but also to be employed as a priori ...
Junfeng Wang   +6 more
doaj   +1 more source

Innovative Multi-Target Estimating with Clutter-Suppression Technique for Pulsed Radar Systems

open access: yesSensors, 2020
Linear frequency modulation (LFM) waveforms have high Doppler-shift endurance because of the relative wide modulation bandwidth to the Doppler variation. The Doppler shift of the moving objects, nevertheless, constantly introduces obscure detection range
Jo-Yen Nieh, Yuan-Pin Cheng
doaj   +1 more source

A Method for Evaluating the Electro-Mechanical Characteristics of Piezoelectric Actuators during Motion

open access: yesSensors, 2012
The electro-mechanical characteristics of piezoelectric actuators which have being driven are evaluated in this paper. The force generated by actuators is measured as an inertial force of a corner cub prism which is attached to the actuators. The Doppler
Hongzhi Jia   +5 more
doaj   +1 more source

Doppler Frequency-Shift Information Processing in WOx -Based Memristive Synapse for Auditory Motion Perception. [PDF]

open access: yesAdv Sci (Weinh), 2023
Zeng T   +8 more
europepmc   +1 more source

The design of multiple orthogonal signals based on auto-encoder optimization network

open access: yesFrontiers in Marine Science
As an important part of active sonar, transmitted signals have a great influence on the performance of ocean exploration, however, in the actual environment, due to the existence of the Doppler frequency shift, the traditional transmitted signals may ...
Binkai Liang, Mingzhi Wang, Sen Zhang
doaj   +1 more source

Surface Current Retrieval From TerraSAR-X Data Using Doppler Measurements [PDF]

open access: yes, 2010
The purpose of this paper is to investigate the estimation of surface currents directly on stripmap TerraSAR-X data, as an alternative to Along Track Interferometry.
Thomas Fritz   +7 more
core   +1 more source

The Space-Based Altimeter Echo-Signal when Doppler Scattering is taken Into Account

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2017
In the analytical approximation of time dependent average power of a satellite altimeter echo-signal (power profile) the Doppler scattering of individual specular point responses is usually neglected.
D. S. Borovitsky   +3 more
doaj  

Analysis of Doppler frequency shift response mechanism based on OFDM system

open access: yesMATEC Web of Conferences, 2018
OFDM system is widely used in mobile communication because of its high spectral efficiency and strong anti-multipath capability. However, in high dynamic scenarios, the Doppler shift between the transmitter and the receiver destroys the orthogonality ...
Li Ke   +3 more
doaj   +1 more source

Doppler shift of the TAE mode frequency in DIII-D [PDF]

open access: yes, 1994
The Doppler shift caused by toroidal plasma rotation in DIII-D complicates a comparison of the frequency of toroidicity-induced Alfven eigenmodes (TAE) to theoretical predictions, but also separates toroidal modes in frequency space and provides ...
Heidbrink, WW, Strait, EJ, Turnbull, AD
core   +1 more source

Extended Kalman Filtering of Satellite Doppler Tracking Data and IT¡¯S Application to Orbit Determination Problems [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1995
Using a directional antenna, the Doppler effect of satellites can be detected and the orbital elements can be obtained by the Extended Kalman Filter with the observed frequency shift data. We obtained the orbital elements of NOAA-11 by the application of
Dong-Kyu Kim, Kyu-Hong Choi
doaj  

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