From 43 GHz VLBA observations of the pair of radio sources QSO 1928+738 and BL 2007+777 we have demonstrated the feasibility of precision phase-delay differential astrometric techniques at millimeter wavelengths. For a pair of sources with 5◦ separation and high antenna elevations, we have shown that present astrometric models and millimeter arrays are advanced enough to model the differential ...

We have measured the phase differences between Xray intensity variations in different energy bands in data taken with Ginga of the Z source GX 5-1 in its normal branch. We apply a χ2 optimal extraction technique to measure the phasedelay spectrum of the normal-branch quasi-periodic oscillations (QPO) and find a jump at 3.5 keV. X-ray intensity variations at the QPO frequency in energy channels ...

We explore a new spectral representation of speech signals through group delay functions. The group delay functions by themselves are noisy and difficult to interpret owing to zeroes that are close to the unit circle in the z-domain and these clutter the spectra. A new modified group delay function [1] that reduces the effects of zeroes close to the unit circle is used. Assuming that this new f...

This paper focuses on low cost production testing of the far-out phase noise of PLL ICs using the delay line discriminator method. It describes two different delay line discriminator (DLD) implementations for phase noise measurements at large frequency offsets from the carrier. The calibration method using an FM calibration signal is described in detail, both mathematically and graphically. The...

A new control paradigm of source signals for high quality speech synthesis is introduced to handle a variety of speech quality, based on timefrequency analyses by the use of an instantaneous frequency and group delay. The proposed signal representation consists of a frequency domain aperiodicity measure and a time domain energy concentration measure to represent source attributes, which supplem...

In the development of a syllable-centric ASR system, segmentation of the acoustic signal into syllabic units is an important stage. This paper presents a minimum phase group delay based approach to segment spontaneous speech into syllablelike units. Here, three different minimum phase signals are derived from the short term energy functions of three sub-bands of speech signals, as if it were a ...

This paper presents a new robust feature set for noisy speech recognition in phase domain along with spectral peaks obtained from group delay and autocorrelation functions. The group delay domain is appropriate for formant tracking and autocorrelation domain is well-known for its pole preserving and noise separation properties. In this paper, we report on appending spectral peaks obtained in ei...

In the development of a syllable-centric ASR system, segmentation of the acoustic signal into syllabic units is an important stage. This paper presents a minimum phase group delay based approach to segment spontaneous speech into syllablelike units. Here, three different minimum phase signals are derived from the short term energy functions of three sub-bands of speech signals, as if it were a ...