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Topic: Pulse signal processing

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	Pulse (signal processing) - Wikipedia, the free encyclopedia
		A rapid, transient change in the amplitude of a signal from a baseline value to a higher or lower value, followed by a rapid return to the baseline value.
		A rapid change in some characteristic of a signal, e.g., phase or frequency, from a baseline value to a higher or lower value, followed by a rapid return to the baseline value.
		In telephony pulse dialing is a way of dialing a telephone number using interrupted electrical pulses (see rotary dial).
	en.wikipedia.org /wiki/Pulse_(signal_processing) (133 words)

	Pulse signal processing circuit having a protection circuit against over-current breakdown - Patent 4476427
		A pulse signal processing circuit as claimed in claim 1, wherein said pulse producing means comprises an input terminal receiving an input signal, a pulse-width modulator producing said pulse having a pulse-width corresponding to said input signal, and an output terminal supplying said pulse to said output switching element.
		A pulse signal processing circuit as claimed in claim 3, wherein said fourth means further comprises a bistable multivibrator which is set by the output from said comparator, the output of said bistable multivibrator being applied to said second means for stopping the current flowing through said output switching element.
		However, since the signal level of the detection signal 3b is unstable, it is preferable to apply this detection signal 3b to a circuit for stabilizing the signal level such as a circuit composed of transistors 26, 28 and 29 and resistors 27, 28, 31 and 32 of FIG.
	www.freepatentsonline.com /4476427.html (5078 words)

	Pulse signal processing circuit - Patent 4620312
		A pulse signal processing circuit includes a NAND circuit that accepts periodic input pulses and an upper-limit detection signal from an upper limit detector and, when both an input pulse and the upper-limit detection signal are present, provides a setting signal to a flip-flop.
		Processing circuits are used to provide timing pulses, instead of using the horizontal synchronizing pulses directly, because the width of the synchronizing pulses is often not precise enough for use by the receiver or VTR.
		In short, pulse width processing circuits are used to provide precision-width timing pulses for a receiver or VTR in response to horizontal synchronizing pulses in a composite video signal and to prevent any noise in the video signal from being interpreted by the receiver or VTR as a timing pulse.
	www.freepatentsonline.com /4620312.html (5281 words)

	Time-Frequency/Time-Scale Analysis for Radar Applications
		The objective of radar processing is to estimate the target's reflective density function from received baseband signal samples, the so-called frequency signature.
		The process of estimating the target's range and removing the extraneous phase term is called focusing or gross translational motion compensation.
		The purpose of analysis is to detect and to extract the signal embedded in noise.
	airborne.nrl.navy.mil /~vchen/tftsa.html (1663 words)

	Absolute phase - Wikipedia, the free encyclopedia
		To solve this problem, the phase of the signals relative to absolute time (UTC) is measured using instruments relying on GPS.
		In signal processing a pulse or finite wavetrain can be considered as a signal of a single frequency modulated by an envelope, or as a superposition of an infinite number of infinitesimal waves of different frequencies.
		For examples of physical effects due to the phase of signals with the same power spectrum, see [3] and [4].
	en.wikipedia.org /wiki/Absolute_phase (350 words)

	Theory (Site not responding. Last check: 2007-10-21)
		Pulse oximetry is based on the fractional change in light transmission during an arterial pulse at two different wavelengths.
		In this way the measurement of the ratio of the fractional change in signal intensity of the two LEDs is used along with the empirically determined calibration equation to obtain a beat-by-beat measurement of the arterial oxygen saturation in a perfused tissue - continuously, noninvasively, and to an accuracy of a few percent.
		Pulse oximetry is now routinely used in nearly all operating rooms and critical care areas in the United States and increasingly throughout the world.
	analgesic.anest.ufl.edu /anest4/hans/EEL4930/pulseox.htm (1237 words)

	Signal Processing
		Signals, whether acquired or generated, can also be filtered, smoothed, and analyzed for particular patterns.
		In this case the Signal must be 5 times the normal noise of the filtered signal for a pulse to be generated.
		The logical pulse can be used to light an output or to start acquisition of the signal or both.
	www.tdt.com /Sys3WebHelp/RPvdsUG/Signal_Processing.htm (439 words)

	HTML-txt: APPLICATION OF PULSE COMPRESSION SIGNAL PROCESSING TECHNIQUES TO ELECTROMAGNETIC ACOUSTIC TRANSDUCERS (EMATS) ...
		Pulse compression has the ability to recover noisy signals without the use of high levels of signal averaging, and thus potentially increases the speed of measurements [16-18].
		The EMAT was driven by a Panametrics pulser and the received signal from a 10mm thick aluminium plate is shown in Figure 3(a).
		The resolution of the image obtained using the pulse compression approach was also improved compared to a transient pulse signal from Panametrics pulser/receiver.
	www.ndt.net /article/wcndt2004/html/htmltxt/51_gan.htm (2371 words)

	thesis (Site not responding. Last check: 2007-10-21)
		Numerous 1-D signal processing techniques are applied to the data and their insensitivity to the effect of the material characteristics on the data is noted.
		Signal processing routines which were used to correct the measured spectra for the insertion effects of the transducers and receiver amplifier and to whiten the electrical input waveform spectrum are described, along with routines to calculate the absorption and dispersion spectra.
		The operation of a wide bandwidth ultrasonic spectrometer for the experimental measurement of phase velocity and attenuation, and the subsequent acquisition and signal processing of the data that is needed are outlined.
	www.eee.nott.ac.uk /wwwudsp/thesis.html (3498 words)

	BAA99-29: Three Dimensional Imaging Sensors Section I (Site not responding. Last check: 2007-10-21)
		Proposals will be considered addressing novel detector and signal processing concepts to efficiently couple the active and passive sensing modes, and to process the large amount of information generated by the integrated sensor.
		Unique signal processing concepts involve development of electronic and/or optical techniques to increase efficiency of the three dimensional imaging process, and the quality and utility of the image.
		Unique signal processing techniques should address methods for determination of the target signal characteristics under a wide range of conditions, methods to reduce the effects of noise and extraneous signals, integration with other types of sensors, and novel designs leading toward extremely low power, small size systems.
	www.darpa.mil /mto/solicitations/BAA99-29/S/Section1.html (3129 words)

	Signal Processing for SAIL (Site not responding. Last check: 2007-10-21)
		The Aerospace SAIL experiments used a series of pulses in which the optical frequency was swept quasi-linearly in time over a bandwidth greater than 1000 gigahertz.
		First, for each pulse, a Fourier transform is applied to the real values obtained from both the target and reference channels.
		For each pulse, the scaled phase-error correction from the reference channel is applied to the target channel, using the scale factor determined from the composite sharpness metric.
	www.aero.org /publications/crosslink/summer2004/08_sidebar1.html (520 words)

	Humanistic Intelligence: `WearComp' as a new framework and application for intelligent signal processing
		The wearable signal processing hardware, which began as a cumbersome backpack-based photographic apparatus of the 1970s, and evolved into a clothing-based apparatus in the early 1980s, currently provides the computational power of a UNIX workstation concealed within ordinary-looking eyeglasses and clothing.
		Although the device may implement very sophisticated signal processing algorithms, the cause and effect relationship of this processing to its input (typically from the environment or the user's actions) should be clearly and continuously visible to the user, even when the user is not directly and intentionally interacting with the apparatus.
		However, it may also be used to shield signal processing circuits from outside interference, or as a ground plane for various forms of conformal antennas sewn into the clothing[14].
	wearcam.org /hi/index.html (13174 words)

	Seasat Altimeter Geophysical Data Record (Site not responding. Last check: 2007-10-21)
		Pulse signal processing yields significant wave height estimates in the range from 1 to 20 m to an accuracy of 0.5 m or 10 percent, whichever is greater, for use in forecasting models and related scientific studies.
		The reflected signal, when received at the spacecraft, was amplified, converted from analog to digital form, and processed digitally in the altimeter.
		The Seasat altimeter footprint is formed when the pulse radiated from the satellite altimeter antenna as a spherical shell intersects the ocean surface and produces a transient illuminated area.
	podaac.jpl.nasa.gov:2031 /dataset_docs/seasat_alt_gdr.html (2692 words)

	Vector » Design of Pulse Oximeters (Ed. J G Webster et al) » Signal processing algorithms (Site not responding. Last check: 2007-10-21)
		Pulse oximeters measure and display the oxygen saturation of hemoglobin in arterial blood, volume of individual blood pulsations supplying the tissue, and the heart rate.
		These devices shine light through the tissue that is perfused with blood such as a finger, an ear, the nose or the scalp, and photoelectrically sense the transmittance of the light in the tissue.
		The signal is then processed using several signal processing algorithms to estimate the arterial oxygen saturation reliably in the presence of motion and other artifacts.
	vector.iop.org /abstract/0750304677/b470c9 (204 words)

	Palmo: a novel pulsed based signal processing technique for programmable mixed-signal VLSI (ResearchIndex)
		This Palmo 1 signalling method applied to signal processing is novel, combining the advantages of both digital and analogue techniques.
		Pulsed signals are robust, inherently low-power, easily regenerated, and easily distributed across and between chips.
		1 Low-voltage log-domain signal processing in CMOS and BiCMOS (context) - Enz, Punzenberger - 1997
	citeseer.ist.psu.edu /494139.html (1715 words)

	Digital Signal Processing Hearing Aids
		After the signal processing is complete, the circuits convert the 20 bit wide data stream into a single pulse, direction-coded (+ or -) signal that is presented directly to the output transducer without any digital to analog conversion.
		The fitting process requires the use of a fairly large soundproof room (such as is found at The Hearing and Speech Center) to adjust the circuitry to the user's ear and to the exact hearing aid shape.
		The signals from the two microphones are processed in the dsp chip to enhance the sounds coming from the front.
	www.hearingcenter.com /info_files/digitha.html (1957 words)

	pulstran (Signal Processing Toolbox) (Site not responding. Last check: 2007-10-21)
		generates a pulse train that is the sum of multiple delayed interpolations of the prototype pulse in vector
		This example generates a periodic Gaussian pulse signal at 10 kHz, with 50% bandwidth.
		The pulse repetition frequency is 1 kHz, sample rate is 50 kHz, and pulse train length is 10 msec.
	www.haystack.mit.edu /computing/matlab5.3.1/help/toolbox/signal/pulstran.html (294 words)

	Appendix C JASA Standards Handbook
		The coverage provided by the JASA, in frequency, simultaneous processing channels, and in the mix and type of signals, is intended to be scalable to meet the requirements of the missions and the restrictions of the platforms.
		Signal data will be provided to the data flow network.
		The output will be signals in digital format, which may take several forms, such as digitized IF, digitized audio, or pulse descriptor words.
	www.fas.org /irp/agency/daro/product/jasa/appd.html (1806 words)

	[No title]
		The dendrites of neurons probably play very important signal processing roles in the CNS, allowing large numbers of afferent spike trains to be differentially weighted and delayed, with linear and non-linear summation.
		These pulses are abstractly represented on a communication bus by the address of the neuron that generated it, and the timing of these address-event communicate analog information.
		For image processing or to model brain areas with complex integrate-and-fire neurons, the simulation of networks consisting of several millions of spiking neurons is desirable.
	www.newton.cam.ac.uk /programmes/NNM/nnm_pulsed2.html (2540 words)

	allegiance healthcare (Site not responding. Last check: 2007-10-21)
		Masimo, a privately-held developer of proprietary signal processing and sensor technologies, has created a fundamentally advanced method to measure arterial oxygen saturation and pulse rate.
		Masimo Signal Extraction pulse oximetry is the only technology clinically proven accurate during patient motion and is designed for accuracy during conditions of low perfusion, bright ambient light and electro-surgical interference.
		Masimo currently licenses its Signal Extraction family of pulse oximetry products worldwide to nearly 20 patient monitoring providers with whom they share revenue from the sale of their proprietary disposable sensors.
	www.masimo.com /partners/allegiance.htm (403 words)

	Optimum Subband Filterbank Design for Radar Array Signal Processing with Pulse Compression (Site not responding. Last check: 2007-10-21)
		Processing in the subband domain has been shown to provide significant benefits when compared to conventional wideband processing.
		These benefits include a major computational reduction in the adaptive processing task; an opcount reduction in the equalizer; and easy parallelization of the entire front-end processing chain that enables an implementation with higher system bandwidth and lower power consumption for a given processor technology.
		These include the analysis filter used to decompose the return signals into narrowband components, the synthesis filter used when combining subband components after processing, and the pulse compression generating filter used to generate subband pulse compression filters from a wideband pulse compression filter.
	ite.gmu.edu /sam2002/sam2000/Final%20Abstracts/Optimum%20Subband%20Filterbank%20Design%20for%20Radar%20Array%20Signal%20Processing%20with%20Pulse%20Compression.html (257 words)

	Signal Processing in MIA Pulse Flaw Detectors. (Site not responding. Last check: 2007-10-21)
		Such processing promises to increase the sensitivity and to reduce the noises, mainly the frictional ones.
		The s(t) pulses are typical for single contact probes, the q(t) pulses - for twin contact probes.
		The calculations confirm that the processing by means of MCF can increase the sensitivity and especially reduce the level of frictional noises.
	www.ndt.net /abstract/ecndt98/479.htm (278 words)

	corpuls
		Masimo, a privately-held developer of proprietary signal processing and sensor technologies, has created a novel approach that measures arterial oxygen saturation and pulse rate even in the presence of motion artifact.
		In these applications, the current pulse oximetry technology has proven to be largely ineffective due to problems caused by patient motion, low perfusion and ambient light.
		Masimo designs, develops and licenses advanced medical signal processing and sensor technology for the noninvasive monitoring of vital physiological parameters.
	www.masimo.com /partners/corpuls.htm (285 words)

	U.S. Pregrant 20020114406 - Signal processing circuit and method for measuring pulse width under existence of ... (Site not responding. Last check: 2007-10-21)
		Signal processing circuit and method for measuring pulse width under existence of chattering noise
		A signal processing circuit and method for measuring the width of an input pulse signal that contains chattering noise.
		The signal processing circuit converts the input pulse signal into an output pulse signal having no chattering noise by setting and resetting a flip-flop circuit at a timing that is delayed by a predetermined time after the rise and fall in the input pulse signal.
	cxp.paterra.com /uspregrant20020114406.html (151 words)

	Radar Signal Processing
		It was primarily developed as a product of ECE 6272, Fundamentals of Radar Signal Processing, a semester-length first-year graduate course in which these notes first served as supplemental material and more recently as the text for the course.
		A one-semester course in radar signal processing can cover virtually all of the text; such a course provides a solid foundation for more advanced work in detection theory, adaptive array processing, synthetic aperture imaging, and more advanced radar concepts such as passive and bistatic systems.
		In either case, a firm background in basic continuous and discrete signal processing and at least an introductory exposure to random processes is advisable.
	www.scitechpub.com /Richards.htm (1212 words)

	Furaxa - Signal Processing
		The pulser/sampler makes advanced architectures in signal processing, amplification, equalization and mixing economically practical to develop at much higher frequencies than formerly possible.
		Conventional microwave image-reject mixers used to convert a RF signal into a near baseband signal typically have less than an octave in bandwidth over which they can operate.
		For more information on how the Libove Pulser / Sampler can be used in a Digital Signal Processor based system, see the High Speed Signal Processing section of the Pulser / Sampler Press Release.
	www.furaxa.com /HSSP.htm (268 words)

	Communication & Signal Processing engineering - Pulse detection using 8051 microprocessor
		In the perfect situation the digitized signal is a single sin-wave pulse with polarity depending on the magnet orientation.
		Hi, I'm not sure what you mean by "digitised signal" in this application.If you have allready used analouge to digital conversion then all you need to do is trigger the 8051 from 1 of the higher data bits.
		This can only come from a stronger signal, which means a stronger or closer magnet or a lower noise detector, which means possibly a more sensitive detector with integrated low-noise preamp located director at the detector.
	www.eng-tips.com /viewthread.cfm?qid=27938 (374 words)

	Radar and Signal Processing capabilities by Phase IV Systems
		Phase IV capabilities in radar and signal processing are truly exceptional and represent one of the many things that make the Company stand out from those focused only on Systems Engineering and Technical Assessment (SETA).
		The trust that our customers have vested in Phase IV is testimony to that reputation and continues today in a variety of radar and signal processing projects, a sampling of which is shown here.
		Target, clutter and noise signals, with various modulation characteristics, are injected into the radar receiver IF chain.
	www.phaseiv.com /expertise_radarsig.html (337 words)

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