In medical imaging, the application of retinal images demands a lot photos to analyze and requires efficient compression techniques for image storage. Retinal must meet stringent quality requirements clinical data be accurate dependable. This paper proposes compressive sampling (CS) framework color (CRI) compression, which relies on spread spectrum Fourier (SSFS) total variant (TV)-based recons...

This paper deals with general nested loops and proposes a novel dynamic scheduling technique. General loops contain complex loop bodies (consisting of arbitrary program statements, such as assignments, conditions and repetitions) that exhibit uniform loop-carried dependencies. Therefore it is now possible to achieve efficient parallelization for a vast class of loops, mostly found in DSP, PDEs,...

Positive feedback loops are common regulatory elements in metabolic and protein signalling pathways. The length of such feedback loops determines stability and sensitivity to network perturbations. Here we provide a mathematical analysis of arbitrary length positive feedback loops with protein production and degradation. These loops serve as an abstraction of typical regulation patterns in prot...

The development of drug resistance by cancer cells is recognized as a major cause for drug failure and disease progression. The PI3K/AKT/mTOR pathway is aberrantly stimulated in many cancer cells and thus it has emerged as a target for therapy. However, mTORC1 and S6K also mediate potent negative feedback loops that attenuate signaling via insulin/insulin growth factor receptor and other tyrosi...

This paper describes a new method for extracting both instantaneous and rms sinusoidal jitter from phase-locked loops (PLL) output signals. The method is based on analytic signal theory and utilizes the Hilbert transform to extract phase information from a PLL signal. Both the theoretical basis and fundamental concepts of the new method are explained. A unified review of conventional methods is...

This paper extends the application of the Cantor metric as a mathematical tool for defining causalities from pure discrete models to mixed-signal and hybrid models. Using the Cantor metric, which maps timed signals, continuous or discrete, into a metric space, we define causality as contractive properties of processes operating on these signals. Thus, the Banach fixed point theorem can be appli...

In this paper, we investigate data converters that exploit the possibilities of advanced digital signal processing. After discussing the necessity and prospects of digital signal processing for data converters to comply with next generation system specifications, we demonstrate three examples of digitally enhanced data converters: time-interleaved analog-to-digital converters, all-digital phase...

Fully integrated frequency-phase generators for a 6-18GHz wide-band phased-array receiver element are presented that generate 5-7GHz and 9-12GHz first LO signals with less than -95dBc/Hz phase noise at 100kHz offset. Second LO signals with digitally controllable fourquadrant phaseand amplitude spread with better than 3 resolution are generated and allow removal of systematic reference clock ske...

PLL Basics A phase-locked loop is a feedback system combining a voltage controlled oscillator and a phase comparator so connected that the oscillator frequency (or phase) accurately tracks that of an applied frequencyor phase-modulated signal. Phase-locked loops can be used, for example, to generate stable output frequency signals from a fixed low-frequency signal. The phase locked loop can be ...

This paper presents a new DSP-oriented code optimization method to enhance performance by exploiting the specific architectural features of digital signal processors. In the proposed method, a source code is translated into the static single assignment form while preserving the highlevel information related to loops and the address computation of array accesses. The information is used in gener...