Frequency and instantaneous phase
Leak detection using instantaneous frequency analysis
... Figure 6-11: Instantaneous phase (top) and instantaneous frequency (bottom) analysis using HT of simulated networks without leak (dash line) and with a leak (solid line) located 27m f[r] ...
24
Tikhonov regularization of instantaneous frequency attribute computations
... of instantaneous frequency, obtained by differen- tiating the instantaneous phase, computed using the Hilbert ...equivalent frequency measure obtained via the normalized first moment of ...
14
Tree Image Growth Analysis Using Instantaneous Phase Modulation
... To compare results from the two filterbanks we per- formed a visual comparison between the generated FM images and the manually segmented rings. From the com- parison, we found that the variable frequency ...
22
II. ANALYTICAL SIGNAL AND INSTANTANEOUS FREQUENCY
... the instantaneous frequencies corresponding to the speech signal formant using the wavelet ...derivative phase of the continuous Morlet wavelet transform ...the instantaneous formantic frequencies ...
5
Sensitivity Enhancement in Digital Instantaneous Frequency Measurement
... the frequency measurement ...in phase ambiguity (in turn frequency ...fine frequency accuracy and shorter delay lines are used to resolve the ambiguities to get wide bandwidth of ...also ...
8
Instantaneous Frequency Estimation Using Stochastic Calculus and Bootstrapping
... Moreover, approximate statistical properties of the pseudo-maximum likelihood estimates of the coefficients of the phase were obtained in a straightforward fashion. Ap- proximate expressions for the Cram´er-Rao ...
16
An Instantaneous Frequency Estimation Approach in a High Noise Environment
... time frequency plane, the peak detection of the TFRs is used as another useful IF estimator, but the IF estimation is highly dependent on SNR and lag window length [1, 5, 6, ...time frequency distributions, ...
5
Adaptive Window Zero Crossing Based Instantaneous Frequency Estimation
... off frequency arbitrarily chosen as ...amplitude, frequency modulated ...polynomial phase fitting, the IF was estimated at the center of the observation window for di ff erent window ...
16
2 to 4 GHz Frequency Discriminator for RF Front-End Instantaneous Frequency Measurement Receivers
... measured phase θ of this stage and that of the first stage are shown in Figure ...the frequency for this stage could be solved by the measured frequency in the first ...The frequency measurement ...
10
A New Approach for Estimation of Instantaneous Mean Frequency of a Time-Varying Signal
... the frequency changes of the signal over time ...the instantaneous frequency (IF) ...the phase of the signal with respect to ...the phase of the signal may take negative values thus ...
8
Instantaneous frequency measurement for IR-UWB signal in CMOS 130 nm
... the Instantaneous Frequency with a local oscillator The measurement of the instantaneous frequency of an oscillating signal shows a great interest for a long time and a lot of techniques ...
Performance Analysis Of Mono-bit Digital Instantaneous Frequency Measurement (Difm) Device
... the phase is only unambiguous within 2 p ...unambiguous frequency range of IFM is equal to ...accurate frequency measurement over a dynamic range of 70 dB or more is practical ...
10
Instantaneous frequency and amplitude of orthocomplex modulated signals based on quaternion Fourier transform
... on frequency content as in the real-valued case, ampli- tude modulation in the time domain corresponds to a frequency shift in the Fourier ...complex instantaneous ampli- tude. Further, the ...
14
An Efficient Algorithm for Instantaneous Frequency Estimation of Nonstationary Multicomponent Signals in Low SNR
... and phase spectrum is given in Figure 6(b). The magnitude and phase spectra give information of the signal frequency content, but not the times when certain frequencies are present in the ...
16
Instantaneous Real-time Cycle-slip Correction of Dual-frequency GPS Data
... Figure 15. Recovery of the simulated cycle slips (Test 3). CONCLUSION Over the past decade, a number of methods have been developed to handle errors in the carrier-phase measurements. There are, in large, two main ...
10
Efficacy of Hilbert Huang Transform (HHT) in the Analysis of Instantaneous Low Frequency Waves of Magnetosheath
... Between 0 and 80 seconds on Figure 1 and Figure 2 corresponding to 0 and 20 sample points on Figure 11, there is an anti-phase superposition pattern which actually leads to the destructive interference. This is an ...
9
An instantaneous frequency based computation of transparent motion
... gradients (instantaneous frequency) from independent bandpass channels, which we apply towards the problem of multiple optic flow analysis. Our approach is similar to th[r] ...
19
Leak detection using instantaneous frequency analysis
... The characteristics of deteriorating water distribution systems include the increased frequency of leaks and main breaks due to internal or external pipe corrosion. Continuous water movement on the inside can ...
199
Instantaneous frequency based newborn EEG seizure characterisation
... In the attempt to characterize newborn EEG seizures, we focused the study on modelling the fundamental IF and extracting mean frequency and frequency span val- ues for the estimated fundamental IFs, all ...
11
Instantaneous Frequency Estimation Methods of Micro-Doppler Signal
... proposed a peak detection method and the first-order time conditional moment method to extract the micro Doppler frequency distribution curve, but only the case of single target with a single micro- scatter was ...
10