Doppler Shift in a Radiating Cable System in Tunnel Environments: A Theoretical Analysis

2019 ◽  
Vol 110 (4) ◽  
pp. 2131-2147
Author(s):  
Alejandro Aragón-Zavala ◽  
Jorge Alberto Seseña-Osorio ◽  
Gerardo Castañón
Keyword(s):  
Theoretical Analysis ◽  
Doppler Shift ◽  
Cable System ◽  
Radiating Cable

scholarly journals An Improved PMF-FFT Algorithm Based on Hamming Window

2021 ◽  
Vol 2093 (1) ◽  
pp. 012037
Author(s):  
Lingfeng Cheng ◽  
Shuyan Ni ◽  
Shimiao Chen
Keyword(s):  
Theoretical Analysis ◽  
Relative Motion ◽  
Doppler Shift ◽  
Spread Spectrum ◽  
Matched Filtering ◽  
Improved Method ◽  
Dynamic Conditions ◽  
High Dynamic ◽  
And Control ◽  
Measurement And Control

Abstract When the rocket uses low-orbit satellite space-based measurement and control, due to the relatively large Doppler shift in relative motion, a spread spectrum system is needed to improve anti-interference; the spread spectrum signal under high dynamic conditions often uses partial matched filtering based on FFT (PMF-FFT) algorithm, but due to the introduction of FFT, this algorithm has serious scallop loss, which affects the system’s capture performance. Through the improved method of adding a Hamming window to the system, theoretical analysis and simulation show that it effectively suppresses scallops. Loss has a certain meaning for the acquisition of spread spectrum signals.

Indoor positioning based on a radiating cable system: a theoretical and experimental evaluation

2018 ◽  
Vol 73 (11-12) ◽  
pp. 777-786
Author(s):  
Jorge A. Seseña-Osorio ◽  
Alejandro Aragón-Zavala ◽  
Gerardo A. Castañon-Ávila
Keyword(s):  
Experimental Evaluation ◽  
Indoor Positioning ◽  
Cable System ◽  
System A ◽  
Radiating Cable

Experimental Study of the Delay Spread in an Indoor Radiating Cable System

2017 ◽  
Vol 98 (1) ◽  
pp. 897-927 ◽  
Author(s):  
Jorge A. Seseña-Osorio ◽  
Alejandro Aragón-Zavala ◽  
Gerardo A. Castañon-Ávila
Keyword(s):  
Experimental Study ◽  
Delay Spread ◽  
Cable System ◽  
Radiating Cable

The measurement of velocity by applying schlieren-interferometry to Doppler-shifted laser light

1969 ◽  
Vol 311 (1506) ◽  
pp. 469-476 ◽  
Keyword(s):  
Theoretical Analysis ◽  
Speed Of Sound ◽  
Doppler Shift ◽  
Laser Light ◽  
Beat Frequency ◽  
Pressure Waves ◽  
Phase Object ◽  
Moving Grids ◽  
Interference Fringes

A method is developed in which light from a laser, after being reflected, refracted, or diffracted in one selected direction by any moving solid or phase object (including particles, flames or pressure waves) is isolated by a ‘schlieren aperture’ and then allowed to interfere with an unperturbed beam. The Doppler shift in wavelength manifests itself as a beat frequency which is related theoretically to the passage of interference fringes past a small photodetector. The theoretical analysis examines various practical limitations and suggests experimental refinements. The method has been applied to moving grids, ultrasonics, flames and particles at velocities ranging from a few centimetres per second to the speed of sound.

Microdiffraction Patterns of Small Metallic Particles II; Theoretical Analysis

1982 ◽  
Vol 40 ◽  
pp. 668-669
Author(s):  
A. Gómez ◽  
P. Schabes-Retchkiman ◽  
M. José-Yacamán ◽  
T. Ocaña
Keyword(s):  
Experimental Data ◽  
Electron Diffraction ◽  
Theoretical Analysis ◽  
Size Range ◽  
Dynamical Theory ◽  
Metallic Particles ◽  
Splitting Effect

The splitting effect that is observed in microdiffraction pat-terns of small metallic particles in the size range 50-500 Å can be understood using the dynamical theory of electron diffraction for the case of a crystal containing a finite wedge. For the experimental data we refer to part I of this work in these proceedings.

Theoretical analysis of a monopole antenna with conducting flat disk above the earth

2001 ◽  
Vol 84 (7) ◽  
pp. 27-36
Author(s):  
Aki Yuasa ◽  
Daisuke Itatsu ◽  
Naoki Inagaki ◽  
Nobuyoshi Kikuma
Keyword(s):  
Theoretical Analysis ◽  
Monopole Antenna ◽  
The Earth ◽  
Flat Disk

Context Aversion, Pavlovian Conditioning, and the Psychological Side Effects of Chemotherapy

1997 ◽  
Vol 2 (2) ◽  
pp. 118-124
Author(s):  
Geoffrey Hall
Keyword(s):  
Animal Model ◽  
Side Effects ◽  
Theoretical Analysis ◽  
Conditioned Response ◽  
Behavioral Strategies ◽  
Contextual Cues ◽  
Anticipatory Nausea ◽  
Laboratory Rats ◽  
Anticipatory Nausea And Vomiting ◽  
Parallel Case

Patients who have undergone several sessions of chemotherapy for cancer will sometimes develop anticipatory nausea and vomiting (ANV), these unpleasant side effects occurring as the patients return to the clinic for a further session of treatment. Pavlov's analysis of learning allows that previously neutral cues, such as those that characterize a given place or context, can become associated with events that occur in that context. ANV could thus constitute an example of a conditioned response elicited by the contextual cues of the clinic. In order to investigate this proposal we have begun an experimental analysis of a parallel case in which laboratory rats are given a nausea-inducing treatment in a novel context. We have developed a robust procedure for assessing the acquisition of context aversion in rats given such training, a procedure that shows promise as a possible animal model of ANV. Theoretical analysis of the conditioning processes involved in the formation of context aversions in animals suggests possible behavioral strategies that might be used in the alleviation of ANV, and we report a preliminary experimental test of one of these.

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