We present methods, based on the short time Fourier transform, which may be used to analyze the structure of multicomponent FM modulated signals instantaneously in time and frequency. The methods build on previously presented cross-spectral methods. In this paper, we introduce the concept of higher order short time Fourier transform phase derivatives, which may be used to estimate signal trajec...

BACKGROUND There is evidence for augmented processing of pain and impaired endogenous pain inhibition in Fibromyalgia syndrome (FM). In order to fully understand the mechanisms involved in FM pathology, there is a need for closer investigation of endogenous pain modulation. In the present study, we compared the functional connectivity of the descending pain inhibitory network in age-matched FM ...

A gamut's size and shape may depend on many factors other than the physical properties of its primary colorants. The color gamut created by certain types of frequency modulated (FM) screening technologies appears to be larger than those created by conventional halftone (AM) screens while using the same colorants. Most device gamuts are determined by the physical properties of the substrate and ...

1 2 Michael Trujillo, Kevin Measor, Maria Magdalena Carrasco and Khaleel Razak 3 4 2 corresponding author 5 Department of Psychology 6 900 University Avenue 7 University of California, 8 Riverside, CA92521, USA. 9 Phone: 951-827-5060 10 Email: [email protected] 11 12 1 Graduate Neuroscience Program 13 University of California, Riverside 14 15 Number of Text Pages: 37 16 Number of Figures: 9 17 Nu...

Error di usion halftoning is a popular method of producing frequency modulated (FM) halftones. In FM halftoning the dot size and shape is xed (equal to one pixel) and the dot frequency is varied in accordance to the graylevel values of the underlying grayscale image. We generalize error di usion to produce FM halftones with user controlled dot size and shape using block quantization and a block...

Closed form solutions for a simultaneously AM and high-harmonic FM mode locked laser system is presented. Analytical expressions for the pulsewidth and pulsewidth-bandwidth products are derived in terms of the system parameters. The analysis predicts production of 17 ps duration pulses in a Nd:YAG laser mode locked with AM and FM modulators driven at 80 MHz and 1.76 GHz for 1 W modulator input ...

This correspondence deals with parameter estimation of product signals consisting of hyperbolic FM and chirp factors. A computationally simple algorithm that decouples estimation of the chirp parameters from those of the hyperbolic FM part is presented. It relies on a simple data transformation that removes the hyperbolic FM component, leaving one with the simpler problem of estimating chirp pa...

Historically, physical models have led to prohibitively expensive synthesis algorithms, and commercially available synthesizers do not yet appear to make use of them. These days, most synthesizers use either processed digital recordings (\sampling synthesis") or an abstract algorithm such as Frequency Modulation (FM). However, as computers become faster and cheaper, and as algorithms based on p...

In this work, multi-scale amplitude modulation–frequency modulation (AM–FM) features are extracted from surface electromyographic (SEMG) signals and they are used for the classification of neuromuscular disorders. The method is validated on SEMG signals recorded from a total of 40 subjects: 20 normal and 20 abnormal cases (11 myopathy, and 9 neuropathy cases), at 10%, 30%, 50%, 70% and 100% of ...