The significance of varying the height and bandwidth of the group delay spectrum is hitherto unexplored in the spectral reconstruction of speech signals. In this paper, a family of variable height-bandwidth filters are designed to evaluate their performance in the reconstruction of speech. The design procedure for higher order group delay filters as a cascade of second order filters is first de...

ew approach for channel blind identification based on second order cyclostationary statistics and the group delay een proposed. In this, two methods are proposed. In both the methods, the correction is applied to the basic phase ate for both the poles and zeros, in the group delay domain. The basic phase estimate is derived from the spectral lation density (SCD) of the system output. In the fir...

High speed wireless communication system attracts much attention in recent years. To realize the high speed wireless communication system utilizing ultrawide-frequency bands, a broadband antenna must be required. However, it is difficult to obtain the antenna which has uniform characteristics in broad frequency band. Thus, the communication quality tends to become worse because of distortion of...

bstract-Cardiovascular response to running exercise was studied ith a simple pulsatile cardiovascular model. Published perimental data during graded exercise were used to tune the odel parameters. Study results show that cardiac output is odulated by rhythmic muscle contractions during running. It cillates when step rate and heart rate are not synchronised but abilises when they are synchronise...

Efficient physical models of bar percussion instruments which preserve spatial sampling are not yet available. In this paper, banded waveguides are proposed as an efficient method for simulating the physics of bars including spatial sampling. In addition two other models are investigated. One is a generalization of the waveguide idea replacing unit delays by all-pass filters modeling the phase ...

There is clear difference in each fiber-optic link’s power output, in the large scale optically controlled phased array antenna. In order to realize the optical power balance and control between the various channels, the equilibrium or control power of each optical signal needs to be considered, and it will reduce the optical beam forming network generated side-lobe beam, which results in the p...

We report ultraslow group velocities of light in a solid. Light speeds as slow as 45 m/s were observed, corresponding to a group delay of 66 μs in a 3-mm thick crystal. Reduction of the group velocity is accomplished by using a sharp spectral feature in absorption and dispersion, produced by a Raman excited spin coherence in an optically dense Pr doped Y2SiO5 crystal. PACS numbers: 42.50.-p, 42...

The use of the phase-delay improves substantially the accuracy obtained in VLBI astrometry with respect to the group-delay observable. Recently, Ros et al. (1999) have extended the related phase-connection technique to a triangle of radio sources with relative separations up to 6.8◦ (the S5 sources BL 1803+784/QSO 1928+738/BL 2007+777). This technique has also been extended for separations up t...

The present work proposed an approach to characterize the word-final glottal stops in Mizo and Assam Sora language. Generally, glottal stops have more strong glottal and ventricular constriction at the coda position than at the onset. However, the primary source characteristics of glottal stops are irregular glottal cycles, abrupt glottal closing, and reduced open cycle. These changes will not ...

The apodization function plays an important role in the behavior of the mean dispersion, group delay and significant reduction of sidelobe level in reflection spectrum. On the other hand, the grating length represents as one of the critical parameters in contributing to a high performance fiber Bragg grating compensator. In this paper, we have investigated and compared the performances of vario...