Record Details

Generalized Analytic Signal Construction and Modulation Analysis

Electronic Theses of Indian Institute of Science

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Field Value
 
Title Generalized Analytic Signal Construction and Modulation Analysis
 
Creator Venkitaraman, Arun
 
Subject Signal Processing
Signal Modulation
Analytic Signal Construction
Fractional Hilbert Transform
Transient Audio Signals
Analytic Signal Modulation
Wavelets
Auditory-Motivated Wavelets
Grammatone Auditory Model
Amplitude Modulation (AM)-Frequency Modulation (FM) Demodulation
Generalized-Phase Hilbert Transform (GPHT)
Gammatone Wavelet Transform
AM-FM Demodulation
Communication Engineering
 
Description This thesis deals with generalizations of the analytic signal (AS) construction proposed by Gabor. Functional extensions of the fractional Hilbert Transform (FrHT) are proposed using which families of analytic signals are obtained. The construction is further applied in the design of a secure communication scheme. A demodulation scheme is developed based on the generalized AS, motivated by perceptual experiments in binaural hearing. Demodulation is achieved using a signal and its arbitrary phase-shifted version which, in turn translated to demodulation using a pair of flat-top bandpass filters that form an FrHT parir.
A new family of wavelets based on the popular Gammatone auditory model is proposed and is shown to lead to a good characterization of singularities/transients in a signal. Allied problems of computing smooth amplitude, phase, and frequency modulations from the AS. Construction of FrHT pair of wavelets, and temporal envelope fit of transient audio signals are also addressed.
 
Contributor Seelamantula, Chandra Sekhar
 
Date 2018-04-02T17:00:28Z
2018-04-02T17:00:28Z
2018-04-02
2013
 
Type Thesis
 
Identifier http://etd.iisc.ernet.in/2005/3316
http://etd.iisc.ernet.in/abstracts/4180/G25682-Abs.pdf
 
Language en_US
 
Relation G25682