This study was undertaken in an attempt to characterize the acoustic properties of snoring sounds in the time and frequency domains, and to correlate between these properties and the mechanical events underlying their production. Three experimental set-ups were used: 1) Dog model--six mongrel dogs, in which partial upper airway obstruction was created by an implanted supraglottic balloon. Flow,...

A study of quasi-continuous waveform (QCW) and its performance in detection is presented taking into consideration eclipsing loss and free space decay. Genetic algorithm is then used to optimise the waveform and lower the dynamic range of the matched filtering output. The resulting waveform with high duty cycle and minimal loss at maximal range maintains good detection performance along the who...

AC-waveform synthesis with quantum-mechanical accuracy has been attracting many researchers, especially metrologists in national metrology institutes, not only for its scientific interest but its potential benefit to industries. We describe the current status at National Metrology Institute of Japan of development of a Josephson arbitrary waveform synthesizer based on programmable and pulse-dri...

This paper describes the waveform reconstruction method of the electric field emitted by UWB (ultra wideband) device by using the complex antenna factor and observed waveform with an oscilloscope. The waveform radiated by a doubleridged guide horn antenna and an impulse generator was measured by an oscilloscope and was reconstructed by the method. The peak power measurement using a resolution b...

This paper presents a high quality Enhanced Waveform Interpolative (EWI) speech coder at 2.8 kbps. The system incorporates novel features such as: dual-predictive analysis-bysynthesis (AbS) quantization of the slowly-evolving waveform (SEW), efficient parametrization of the rapidly-evolving waveform (REW) magnitude, and AbS vector quantization (VQ) of the REW parameter. Subjective tests indicat...

This application note describes how to enable a Digital to Analog Converter (DAC) to generate a quick and controlled waveform (rise time and wave shapes) from a predefined set of digital data. The rise time of a waveform generated using Automatic mode can be much quicker, but generation of all waveform shapes is not possible through Automatic mode. Automatic mode can generate square, triangle, ...

1053-5888/09/$25.00©2009IEEE IEEE SIGNAL PROCESSING MAGAZINE [53] JANUARY 2009 W aveform-agile sensing is motivated by the improvements in performance that can result when the transmitted waveform is dynamically tailored to match the sensing objective and the environment. Waveform agility in active radar systems can provide performance improvements such as reduced target-tracking error, improve...

The effects of gender and other contributory factors on pulse waveform are still under arguments. In view of different results caused by few considerations of possible influential factors and general agreement of gender relating to pulse waveform, this study aims to address the confounding factors interfering with the association between gender and pulse waveform characteristics. A novel method...

Most commercial LIDAR systems temporarily record the entire laser pulse echo signal, called full-waveform, as a function of time to extract the return pulses at data acquisition level in real-time; typically up to 4-5 returns. The new generation of airborne laser scanners, the full-waveform LiDAR systems, are not only able to digitize but can record the entire backscattered signal of each emitt...

The effect of forest disturbance on the lidar waveform and the forest biomass estimation was demonstrated by model simulation. The results show that the correlation between stand biomass and the lidar waveform indices changes when the stand spatial structure changes due to disturbances rather than the natural succession. This has to be considered in developing algorithms for regional or global ...