time-frequency
Time Frequency Analysis methods: A Comparative study
... in frequency contents of the non-stationary signal with good ...the frequency changes of the non-stationary ...the time at which the changes in frequency may ...the ...
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Filtering in Time Frequency Domain using STFrFT
... particular time instant, calculate its Fourier Transform and repeat it for the entire length of the ...a time, to represent the instant spectrum of the signal at that ...powerful ...
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2-D DOA Estimation of LFM Signals for UCA Based on Time-Frequency Multiple Invariance ESPRIT
... and time frequency MI-ESPRIT ...the time-frequency analysis tool in this ...spatial time-frequency matrix can be obtained through the average of multiple ...
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Time-Frequency Analysis and Harmonic Gaussian Functions
... The time-frequency analysis is an important field of study and has many important ...in time and ...the time-frequency distribution of the energy of a signal at any scale of resolution ...
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A Time Frequency Approach for Discrimination of Heart Murmurs
... In this paper, a novel framework based on a time-frequency (TF) approach is proposed for detection of murmurs from heart sound signal. First, a high-resolution TF algorithm, matching pursuit, was used to ...
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Multi-Band Frequency Window for Time-Frequency Fault Diagnosis of Induction Machines
... Nevertheless, frequency domain analysis requires stable working conditions, which is not the case for wind generators, motors driving varying loads, ...the time-frequency domain -such as a ...
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Time-Scale and Time-Frequency Analyses of Irregularly Sampled Astronomical Time Series
... (in time) elements in the time- frequency plane (horizontal ...the time series does not correlate well with any long lifetime dictio- nary element, its information is diluted and then ...
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Time-Frequency Effects in Wireless Communication Systems
... by Time-Multiplexed Spectrum is a signal-processing lin- earization technique with the unique property of improving linearity in the desired sig- nal without requiring knowledge of the nonlinear circuit or ...
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Approximating the Time-Frequency Representation of Biosignals with Chirplets
... the time-frequency plane is approximated by a number of localized straight line ...low frequency oscillations that overlap with the signal in ambiguity ...a frequency- modulated signal and its ...
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Frequency Estimation Using Time-Frequency Based Methods
... The first part of testing is done in MATLAB, by simulating the algorithm performance in Personal Computer using Intel Pentium 4 processor running at 2.0 Gigahertz (GHz) with 1 Gigabyte (GB) of memory. Testing is done on ...
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Time-Frequency Training OFDM: A Novel Technique
... the Time Domain Synchronous Orthogonal Frequency Division Multiplexing (TDS-OFDM) is a novel ...Orthogonal Frequency Division Multiplexing (CP-OFDM), TDS-OFDM has high spectral efficiency but suffers ...
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Time frequency analysis in terahertz pulsed imaging
... terahertz frequency band of the electromagnetic spec- trum accessible for practical ...a time series at each pixel, is ...the frequency composition of the pulses, but also how these dif- fer for ...
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Time-Frequency and Time-Scale-Based Fragile Watermarking Methods for Image Authentication
... the time-frequency signature harder to perceive or to ...its time-frequency representation is used to certify the original ownership of the image and verify whether it has been modified or ...
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Research and Comparison of Time-frequency Techniques for Nonstationary Signals
... five time-frequency analysis methods, ...high time- frequency ...the time-frequency aggregation and cross ...instantaneous frequency components, it is more suitable and ...
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High-Resolution Time-Frequency Methods' Performance Analysis
... Half way in this decade, there is an enormous amount of work towards achieving high concentration along the individual components and to enhance the ease of iden- tifying the closely spaced components in the TFDs. The ...
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A general theory on frequency and time–frequency analysis of irregularly sampled time series based on projection methods – Part 2: Extension to time–frequency analysis
... the time–frequency plane, plus a polynomial trend, plus a stationary Gaussian continuous autoregressive-moving-average (CARMA) ...a time-dependent Gaussian function with a variance depending on the ...
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Sweep frequency response analysis using time frequency distribution
... “SWEEP FREQUENCY RESPONSE ANALYSIS (SFRA) USING TIME FREQUENCY DISTRIBUTION (TFD)” and found that it has comply the partial fulfillment for awarding the degree of Bachelor of Electrical Engineering ...
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Time-frequency analysis based on wavelets for Hamiltonian systems
... using time-frequency analysis based on ...assigning time-varying frequencies to the time-series representing the solutions, we are able to detect quasiperiodic motion where chaos was believed ...
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Carrier Frequency Offset Estimation for OFDM Systems Using Time/Frequency-Domain Techniques
... Orthogonal frequency division multiplexing (OFDM) is becoming the chosen multi-carrier modulation technique for wireless and multimedia communication ...and frequency-offset control must be used to ensure ...
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Categorisation of panic disorder by time-frequency methods
... CONCLUSIONS We have presented a W P and Gabor transforms analysis comparison for parameterising ERP with the aim of differentiating between presented neutral and anxiety words to a patie[r] ...
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