Learn More
—We propose a nonuniform sampling digital tanlock loop (DTL) that utilizes a constant time-delay unit instead of the constant 90 phase shifter. The new structure reduces the complexity of implementation and avoids many of the practical problems associated with the digital Hilbert transformer like the approximations and frequency limitations. The time-delay(More)
In the recent years, a lot of research has been done in the field of covert chaotic communication involving many known chaotic maps and the results have been very promising. In this paper the generation of binary sequence using modified chaotic sine map is discussed. The auto correlation and the cross correlation properties of the generated sequence is(More)
Transient receptor potential (TRP) polycystin 2 and 3 (TRPP2 and 3) are homologous members of the TRP superfamily of cation channels but have different physiological functions. TRPP2 is part of a flow sensor, and is defective in autosomal dominant polycystic kidney disease and implicated in left-right asymmetry development. TRPP3 is reported to implicate in(More)
a r t i c l e i n f o a b s t r a c t Automatic facial expression recognition (FER) is a sub-area of face analysis research that is based heavily on methods of computer vision, machine learning, and image processing. This study proposes a rotation and noise invariant FER system using an orthogonal invariant moment, namely, Zernike moments (ZM) as a feature(More)
— It is shown that the use of chaos shift keying (CSK) with a transmit diversity technique such as beamforming and space-time coding can provide a secure communication link with improvement in the system error performance. Spreading sequences that are used to scramble data in spread spectrum (SS) systems can be generated using a single mathematical(More)