This work presents and estimates the break-lock in phase locked loop (PLL) synthesizers for monopulse radar applications through experimental measurements and computer simulation. Sinusoidal continuous wave (CW) and linear frequency modulated (LFM) signals are used as repeater jamming signals. The CW jamming signal power as a function of radar echo signal power at break-lock is estimated for di...

Overweight and obesity is one of the risk factors for developing CVD. At present, very little is known about the acute effects of dietary fibre on lipids, glucose and insulin, resting energy expenditure and diet-induced thermogenesis in overweight and obese individuals. This study examined the postprandial metabolic effects of dietary fibre in overweight and obese men. Ten overweight and obese ...

Abstract We propose a single channel blind source separation algorithm for convolutively mixed linear frequency modulation (LFM) signals based on smoothed Wigner-Ville distribution (SWVD) time-frequency analysis, Canny edge detection, and Hough transform detection. First, the SWVD analysis diagram is obtained as an image LFM characteristics. Second, detection performed image. Then, used to dete...

To complete the sparse sampling of linear frequency modulation (LFM) signals and estimate parameters, authors proposed an improved finite rate innovation (FRI) system to achieve goal. First build a mathematical model based on Z-transform, then they input LFM signal into modified FRI process output this model, which enables estimation parameters using only four points. The error final experiment...

A typical geoacoustic inversion procedure involves powerful source transmissions received on a large-aperture receiver array. A more practical approach is to use a single moving source and/or receiver in a low signal to noise ratio (SNR) setting. This paper uses single-receiver, broadband, frequency coherent matched-field inversion and exploits coherently repeated transmissions to improve estim...

An interference excision algorithm in direct-sequence spread spectrum (DS-SS) communication systems is introduced. The proposed excision algorithm is developed for linear frequency modulated (LFM) signals that have broadband frequency characteristics. It is based on the time-frequency analysis of received signals employing short-time Fourier transformation (STFT). To analyze the interference, S...

In this paper, parameter estimation of linear frequency modulation (LFM) signals containing additive white Gaussian noise is studied. Because the center an LFM signal affected by error propagation effect, resulting in a higher to ratio (SNR) threshold, method for based on time reversal proposed. The proposed avoids SNR loss process estimating frequency, thus reducing threshold. simulation resul...

The measurement of brachial artery vasodilation in response to a hyperaemic stimulus has been used extensively to assess changes in endothelial function. However, whether or not similar changes occur in response to an active hyperaemic stimulus is unknown. The purpose of the present study was to compare brachial artery vasodilation in response to an active compared with a reactive hyperaemic st...