This paper presents search methods to optimize word-length for digital systems. Finding the word-length is tedious work when the variables for optimization are numerous. We have proposed sequential and preplanned searches to find out optimum wordlength, and compared them in terms of the trials. A comparison for a given optimized point is evaluated. We apply them to word-length optimization for ...

We propose a coherent mathematical model for human fingerprint images. Fingerprint structure is represented simply as a hologram - namely a phase modulated fringe pattern. The holographic form unifies analysis, classification, matching, compression, and synthesis of fingerprints in a self-consistent formalism. Hologram phase is at the heart of the method; a phase that uniquely decomposes into t...

Silicon microring resonators are proposed to achieve ultrasmall differential quadrature phase-shift keying modulators and demodulators operated at 20 Gb/s, which may require a dramatically reduced chip size. The modulators are characterized in terms of the carrier transit time and misalignment of the driving signals, while the demodulation performance is analyzed in terms of the bandwidth and f...

The contribution deals with the utilization of Matlab for simulation and analysis of digital QPSK and M-QAM modulators and demodulators used in DVB (Digital Video Broadcasting) standard. Presented modulators and demodulators are optional modules of simulation system that can evaluate the influence of transmission errors on transmitted digital signal and according visual information. The system ...

Visible light communications achieve wireless using sources such as lighting fixtures and electric signboards. The need to blink at high speed avoid flickering. However, the blinking frequency is much higher than frame rate of general-purpose cameras that are integrated into consumer devices smartphones. This paper proposes a method where principle I/Q demodulator employed in radio used estimat...

In Orthogonal Time Frequency Space (OTFS) modulation, information symbols are embedded in the delay-Doppler (DD) domain instead of time-frequency (TF) domain. order to ensure compatibility with existing OFDM systems, most prior work on OTFS receivers consider a two-step conversion, where received time-domain (TD) signal is firstly converted (using an demodulator) followed by post-processing thi...