| @ARTICLE |
{P1180931819, |
| AUTHOR = |
{Anandthirtha. B. GUDI and H. C. Nagaraj}, |
| TITLE = |
{Trigonometric Trial Functions for Reproduction of Disabled Children Speech Signal}, |
| JOURNAL = |
{ICGST International Journal on Digital Signal Processing, DSP}, |
| YEAR = |
{2010}, |
| MONTH= |
{December}, |
| VOLUME = |
{10}, |
| ISSUE = |
{I}, |
| PAGES= |
{1--8}, |
| ABSTRACT= |
{Speech reproduction is necessary for applying corrective techniques. In this work, the amplitude profile of sampled speech data were fitted with trigonometric trial functions with a confidence level of more than 90%. Furthermore, poles are plotted in the unit circle for the matched trial function and movement of poles away from the origin acts as an indicator for the severity of the speech pathological subject}, |
| NOTE= |
{Correlation, Curve fitting, Discrete time signal, Linear filter, Speech disability}
}
|
(Status: Accepted Full Paper)
| @ARTICLE |
{P1180937859, |
| AUTHOR = |
{A. Rhattoy and M . Lahmer and A . Zatni}, |
| TITLE = |
{Electromagnetic Radiation from Vertical Dipole Antennas and SAR Distribution in Human Head Model using FDTD Technique }, |
| JOURNAL = |
{ICGST International Journal on Digital Signal Processing, DSP}, |
| YEAR = |
{2010}, |
| MONTH= |
{December}, |
| VOLUME = |
{10}, |
| ISSUE = |
{I}, |
| PAGES= |
{9--18}, |
| ABSTRACT= |
{In this paper, a three dimensional Finite Difference Time Domain (FDTD) method is used to analyze communication mobile handsets at 1800 MHz. In the first part, the antenna input impedance the reflection coefficient (|S11|) and the voltage standing wave ratio (VSWR) are studied. In the second part, we report the calculation of the near and far irradiated electromagnetic fields, the Specific Absorption Rate (SAR) distribution (induced in a simple computational model of the human head) and the effect of changing the distance between the head and the antenna. Finally we study the effect of frequency on the radiation pattern}, |
| NOTE= |
{ GSM, Antenna Dipole, Mobile phone, Electromagnetic Field, SAR, FDTD, Near Field, Far field, radiation patterns }
}
|
(Status: Accepted Full Paper)
| @ARTICLE |
{P1181008001, |
| AUTHOR = |
{Prakash Biswagar and S.Ravishankar}, |
| TITLE = |
{Spherical Modal Analysis of a Lens based Antenna for Mobile Broadband Systems}, |
| JOURNAL = |
{ICGST International Journal on Digital Signal Processing, DSP}, |
| YEAR = |
{2010}, |
| MONTH= |
{December}, |
| VOLUME = |
{10}, |
| ISSUE = |
{I}, |
| PAGES= |
{19--27}, |
| ABSTRACT= |
{To economically meet the high directivity requirements of MBS (Mobile Broadband Systems), a composite antenna comprising a set of primary radiators embedded inside or backing up a dielectric lens is proposed. In this paper a new and accurate analytical formulation based on Spherical Modal Expansion (SME) of the near fields of primary radiators in the presence of a dielectric spherical lens is presented. The analysis treats the lens as a scatterer and characterizes the source fields completely unlike earlier works. The novelty of the analysis is extended by utilizing radial translation and spatial rotation of the Spherical Modal Complex Coefficients (SMCC) to align them to the phase centre of the lens. A new closed form solution is developed to obtain the scattered fields due to the lens by application of boundary conditions. A sample computation along with results of a focused experimental program is presented to demonstrate the validity of the new approach. The analysis is flexible enough to accommodate different types of primary radiators and different shapes for the dielectric lens.}, |
| NOTE= |
{ MBS, Dielectric Lens, SME, SVWF, SMCC }
}
|
(Status: Accepted Full Paper)
| @ARTICLE |
{P1181021074, |
| AUTHOR = |
{B. Karuna kumar and K.Satya Prasad}, |
| TITLE = |
{Reliable Fingerprint Feature Extraction Algorithm}, |
| JOURNAL = |
{ICGST International Journal on Digital Signal Processing, DSP}, |
| YEAR = |
{2010}, |
| MONTH= |
{December}, |
| VOLUME = |
{10}, |
| ISSUE = |
{I}, |
| PAGES= |
{29--42}, |
| ABSTRACT= |
{Reliable extraction of features from poor quality prints is the most challenging problem faced in the area of fingerprint recognition. We adopted an algorithm for fingerprint image enhancement based on Short Time Fourier Transform (STFT). STFT is a well known time – frequency analysis technique to analyze non–stationary signals. The existing fingerprint feature extracting algorithms based on predominantly local landmarks (e.g., minutiae–based) or exclusively global information. Our representing fingerprint texture that relies on extracting one (or more) invariant points of reference of the fingerprint texture based on an analysis of its orientation field. A predetermined region of interest around the reference point is circular tessellated into cells. Each cell is then examined for the information in one or more different, orientation specific, spatial frequency channels. An ordered enumeration of the features thus extracted from each cell is used as the representation of the fingerprint. Thus, the representation elements capture the local information and ordered enumeration of the tessellation captures the invariant global relationship among the local patterns. The local discriminatory information in the sector, decomposed by Gabor filter bank and compute the average absolute deviation from the mean of gray value intensities is called the Finger Code}, |
| NOTE= |
{Contextual filters, Short Time Fourier Transform (STFT), Tessellation, Average Absolute Deviation (AAD)}
}
|
(Status: Accepted Full Paper)
| @ARTICLE |
{P1181005985, |
| AUTHOR = |
{Mehdi Rahnama and Alishir MoradiKordalivand}, |
| TITLE = |
{A Design, Analysis and Optimization of 1.9 GHz CDMA Low Noise Amplifier}, |
| JOURNAL = |
{ICGST International Journal on Digital Signal Processing, DSP}, |
| YEAR = |
{2010}, |
| MONTH= |
{December}, |
| VOLUME = |
{10}, |
| ISSUE = |
{I}, |
| PAGES= |
{43--49}, |
| ABSTRACT= |
{In this paper, a 1.9GHz CDMA low noise amplifier (LNA) has been designed, analyzed and simulated using GaAs technology with high RF performances. A technique to design this LNA is presented along. The proposed low noise amplifier allows a receiver system to become adaptive to an antenna's array, waveguides and a transmission lines, as well as standard antenna signal powers. It is also suitable for applications in cellular and PCS handsets, and other systems requiring super low noise Figure with good intercept in the 0 to 10 GHz frequency range. At 1.9GHz, the amplifier is optimized to provide a max gain of 16.7dB, a noise Figure (NF) of only 0.9 dB. The proposed LNA dissipates a power of 20mW at a supply voltage of 2V. Although this paper is based on LNA design with a specific transistor, this general LNA design technique can be used for other transistors and applications}, |
| NOTE= |
{Design rules of Microwave transistors, GaAs technology, LNA, RF-Measurement}
}
|
(Status: Accepted Full Paper)
|
