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Topic: Chirp

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Chirplet

Fourier transform

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	Chirp n Squawk Bird Supplies Return Policy
		You can trust that any item you receive from Chirp n Squawk Bird Supplies has not been exposed to birds and will be safe and sanitary.
		You can trust that when you buy a harness, cloth or fiber toy, cage apron or other fiber items from Chirp n Squawk Bird Supplies that your bird will not become infected with a contagious disease.
		You will be charged at the time the second order is sent and reimbursed once the return or incorrect item is received at our location.
	www.birdsupplies.com /Chirp-n-Squawk-Bird-Supplies-Return-Policy-s/73.htm (725 words)

	Chirp - Wikipedia, the free encyclopedia
		A chirp is a signal in which the frequency increases ('up-chirp') or decreases ('down-chirp') with time.
		Chirps have been heavily used in radar applications and as a result advanced sources for transmission and matched filters for reception of linear chirps are available[1].
		The projective chirp is ideally suited to image processing, and forms the basis for the projective chirplet transform.
	en.wikipedia.org /wiki/Chirp (683 words)

	What is CHIRP
		CHIRP complements the CAA Mandatory Occurrence Reporting system and other formal reporting systems operated by many UK organisations, by providing a means by which individuals are able to raise issues of concern without being identified to their peer group, management, or the Regulatory Authority.
		CHIRP was formed in 1982 as a result of a joint initiative between the Chief Scientific Officer Civil Aviation Authority (CAA), the Chief Medical Officer CAA and the Commandant Royal Air Force Institute of Aviation Medicine (IAM).
		CHIRP was established in its present form, as a registered charitable company, limited by guarantee, on 1 November 1996.
	www.chirp.co.uk /new/Aviation/Whatis/what_is_chirp.htm (1144 words)

	USGS Open-file Report 01-123: Data - navigation and chirp profiles
		The numerical data files of ship navigation and bottom-towed chirp profiles of the two cruises of the Cape Hatteras in this area are in two directories, navdata, and segydata, respectively.
		The Datasonics Inc. SIS 7000 deep-towed sidescan sonar and chirp profiling unit was developed in 1990 in conjunction with the USGS.
		On cruise 92023, 58 km of deep-towed chirp data were recorded on 4 lines and broken into a total of 8 files.
	pubs.usgs.gov /of/of01-123/report/4maindata.html (711 words)

	Project Proposal for EE359 - Wireless Communications
		Chirps have been heavily used in radar applications and as a result advanced sources for transmission and matched filters for reception of linear chirps are available.
		Generally, the chirp rates are chosen such that the transmitted signal occupies a bandwidth well in excess of the minimum bandwidth necessary, which is approximately the inverse of the bit period.
		In fact, the chirp signals may be somewhat loosely considered as the continuous-time equivalent of the discrete-time spreading codes used in conventional spread spectrum techniques like direct sequence spread spectrum (DSSS).
	www.stanford.edu /~hengstle/Project_Proposal.htm (649 words)

	Facilities
		Pulse compression using the chirp technique has proven to be a powerful method for measuring the channel response since it avoids transmitter peak power limitations and offers excellent interference rejection capabilities.
		A more detailed description of the chirp sounder theory and implementation is presented in a number of papers available in the publications tab.
		In the transmitter, the locally generated RF chirp signal is simply amplified and transmitted across the desired channel as shown in figure 2.
	www.dur.ac.uk /comms.systems/radiogd.htm (650 words)

	Chirp User's Manual
		Chirp is Copyright (C) 2003-2004 Douglas Thain and Copyright (C) 2005- The University of Notre Dame.
		Chirp is like a distributed filesystem (such as NFS) except that it can be run over wide area networks and requires no special privileges on either the client or the server end.
		Chirp allows the end user to set up fine-grained access control so that data can be shared (or not shared) with the right people.
	www.cse.nd.edu /~ccl/software/manuals/chirp.html (2717 words)

	G3PLX Chirp Project (Site not responding. Last check: 2007-10-09)
		Peter's design uses the special chirped filter previously described, with properties not attainable with a conventional filter, and so is able to detect the transmissions with 0.66 ms time resolution, and with very narrow bandwidth that provides high sensitivity.
		Knowing the chirp rate of the transmission, and what frequency the chirp is being received on, one can work out the nominal "chirp time" at which the received signal started at zero - by simply counting back at 100 kHz/second.
		Chirp times are typically quoted in the form period:chirp time, where the period is in seconds, and the chirp time is the zero frequency extrapolated time of the first chirp transmitted each hour.
	www.qsl.net /zl1bpu/chirp/chirps.html (3091 words)

	Measuring Spatial Chirp and Pulse-Front Tilt in Ultrashort Pulses Using Single-Shot FROG
		Spatial-chirp (in which the average wavelength of the pulse varies spatially across the beam) and pulse-front tilt (in which the pulse intensity fronts are not perpendicular to the propagation vector) are common spatio-temporal distortions in ultrashort pulses.
		Because the single-shot SHG FROG trace and spatio-spectral diagnostics for spatial chirp both involve plots of intensity vs. frequency and position, the FROG-trace tilt is naturally related to the spatial chirp.
		To vary the spatial chirp of a pulse, we placed mirrors between the last two prisms of a pulse compressor, deflecting the pulse to two additional mirrors mounted on a translation stage.
	www.physics.gatech.edu /gcuo/RecentDev/SpatialChirp.html (727 words)

	2.8 Java Applications
		Chirp I/O streams are the easiest way to get started.
		Regardless of which I/O style, the Chirp library must be specified and included with the job.
		The Chirp JAR file must be specified in the submit description file.
	www.cs.wisc.edu /condor/manual/v6.6/2_8Java_Applications.html (998 words)

	Re: Network analysis using chirp signal. (Site not responding. Last check: 2007-10-09)
		The problem is that windowing the excitation chirp signal means reduction the lowest and higest frequency components.
		I have > > also used a chirp signal to estimate the frequency response of a filter I > > implement in lattice, WDF and other structures.
		When I applying the chirp > > signal as an input to the filter and compute the frequency function for a > > simple low pass filter via FFT I got a moderated dc value.
	www.talkaboutelectronicequipment.com /group/comp.dsp/messages/162491.html (625 words)

	Chirp
		Chirp is a storage system designed for cooperative computing.
		Chirp allows ordinary users to discover, share, and access storage, whether within a single machine room or over a wide area network.
		Chirp is designed to be deployed with a minimum of fuss.
	www.cse.nd.edu /~ccl/software/chirp (169 words)

	Translation of chirp
		chirp in Dutch is tjilpen, kwetteren, sjilpen, piepen
		chirp in French is gazouiller, pépier, gazouillis, grésiller
		chirp in Hungarian is csipogás, gõgicsélés, csiripelés, gügyögés
	www.brainytranslation.com /translations/ch/chirp261100.html (37 words)

	RCS-5A Chirp Sounder Receiver
		In the beginning the only way for a hobbyist to receive chirps was by using their ears and a short wave receiver tuned to a fixed frequency or manually tuning the receiver or use a commercial chirp receiver like the RCS-5().
		The average chirp power received from a 100 W chirp transmitter was much greater than the pulse power from a 100 kW pulse transmitter, and chirp is coherent.
		Chirp is not a magic mode and for some paths you can only hear anything at certain times of the day/night.
	www.pacificsites.com /~brooke/RCS-5A.shtml (4277 words)

	Chirp (Site not responding. Last check: 2007-10-09)
		It is commonly used in sonar and radar, but has other applications, such as in spread spectrum.
		In a geometric chirp, the period of the signal varies linearly with time.
		Although harder to generate, this type does not suffer from reduction in correlation gain if Doppler shifted by a moving target.
	www.theezine.net /c/chirp.html (114 words)

	Re: Network analysis using chirp signal.
		I applied window to my chirp signal and now I can estimate the notch in the noch filter up to -200 dB (using good window) Hmm for low pass filter the DC value should pass troight...
		I have > also used a chirp signal to estimate the frequency response of a filter I > implement in lattice, WDF and other structures.
		When I applying the chirp > signal as an input to the filter and compute the frequency function for a > simple low pass filter via FFT I got a moderated dc value.
	www.talkaboutelectronicequipment.com /group/comp.dsp/messages/162471.html (496 words)

	Lightwave - Chirp-managed-laser technology delivers > 250-km reach
		Chirped managed lasers leverage adiabatic chirp to increase dispersion tolerance and enable longer distance transmission.
		The chirp of the DML broadens the signal to > 1 nm at 10 Gbits/sec, causing rapid distortion of the eye after propagation.
		When a semiconductor laser is directly modulated, it generates two main types of chirp: Transient chirp, which occurs at bit transitions and hastens pulse spreading in fibers with positive dispersion, and adiabatic chirp, which makes the 1 bits blue-shifted relative to the 0 bits.
	lw.pennnet.com /Articles/Article_Display.cfm?ARTICLE_ID=234160&p=13 (1304 words)

	Chirp Protocol (Site not responding. Last check: 2007-10-09)
		Chirp is a simple and lightweight remote I/O protocol used by a variety of research projects related to Condor.
		A Chirp module in the library is used to connect high-energy physics applications to Chirp servers.
		A sample implementation of the Chirp protocol in both C and Java is also available here.
	www.cs.wisc.edu /condor/chirp (266 words)

	Chirp's Special Lens
		The second shot shows the fluorescence of the feathers and thus we are given insight into what parrots may be seeing in the ultra violet spectrum.
		Chirp had been eating raspberries and you can see that he looks like a caique staring in the Texas Chainsaw Massacre.
		George: Upon closer examination, I discovered that not only was Ingrid correct about Chirp's eye liner, but there is a whole lot more that wasn't initially obvious to the human eye.
	www.cleos-corner.com /georgefunnies1.html (484 words)

	Phase 2 - CHIRP
		CHIRP is a completely safe, medically monitored program designed to help you reduce stress, improve the quality of your life, build a healthier heart and resume most, if not all of your prior activities.
		CHIRP is a progressive, 12-visit program lasting four weeks.
		Patients who have heart disease and are considered by their physicians to be in need of rehabilitation can be referred to the program.
	www.blountmemorial.org /body.cfm?id=92 (165 words)

	Chirp-managed laser increases 10G reach (August 2005) - News & Analysis - fibers.org
		What we've realized is that hidden in there, there's also adiabatic chirp, which follows the optical power.
		Let's say with a 1-0-1 bit sequence, the ones are going to have higher amplitude; they'll be blue-shifted relative to the zeroes, which have lower amplitudes - they'll be red-shifted.
		And the magnitude of that shift is called the 'adiabatic chirp.' The laser, at least at adiabatic chirp, kind of follows the bit sequence."
	fibers.org /articles/news/7/8/5 (755 words)

	Home made Sonar
		The optimal chirp will depend on the application but for the "in house" stuff I've been playing with- this has been my favorite – it sweeps from 5 to 20 kHz and is about 4.5 Milli-seconds long.
		I use a correlation procedure to find the echoes among to jumble of sounds which are recorded by the mic.
		The is just a linear gain adjustment at the moment – it proably should be a square function but there are also reasons for keeping it linear which I may get into later.
	www.eddiem.com /projects/chirp/chirp.htm (1048 words)

	Chirp
		There are now 2 ways to receive chirps at a fixed frequency, the origional DSP based method and a PC sound card method.
		In operation the PC Chirp program is allowed to run for about 24 hours and the statistics file accumulates those chirps whose periods are defined in the ini file.
		The DSP box outputs a chirp that can be used to modulate an RF carrier fed to the receiver and the USB audio is feed back to the DSP box.
	www.pacificsites.com /~brooke/Chirp/Chirp.shtml (895 words)

	Personal 3 - Black-White
		Since you can create various chirp waveforms by adjusting the rate at which the frequency increases (the slope), we decided to take a closer look in order to see how the slope of our chirp affects its properties.
		The Chirp waveform is very important to certain radar applications and has many benefits.
		However, as we increase the slope of our chirp, it is very apparent that the chirp waveform does a very good job of detecting the range resolution, but not as good a job of detecting frequency resolution.
	www.owlnet.rice.edu /~elec301/Projects01/ambiguity/chirp.html (190 words)

	CHIRP LAB - Staff and Faculty
		He started working for the Chirp Lab in 1997 where he works on the electronic devices and make instrument packages for the lab.
		Ed was born in Milwaukee, WI in 1962.
		Many of the vessels inlcude and are not limited to the Ocean Explorer, Morpheus, Ocean Voyager II, and the Chirp lab's Deep Tow and Boss I-III.
	www.oe.fau.edu /CHIRP/personnel1.html (1002 words)

	ASF SAR Processing Algorithm (Site not responding. Last check: 2007-10-09)
		The transmitted chirp is obtained from the downlinked data's header.
		The chirp is a very distinctive signal; it has sharp impulse response.
		Actually the Doppler parameters already provide a chirp that's in frequency space, but the complex conjugate needs to be performed and then sections of the function will be weighted (as in range).
	www.asf.alaska.edu /reference_documents/datacenters_references/sar_processing.html (5222 words)

	Naked mole-rats share food with a chirp and a wave
		As soon as a mole-rat scout located the biologists' stash of sweet potato bits, it would pick up one piece in its mouth and scurry directly back to the nest chamber, making a distinctive "chirp" call along the way.
		Once in the nest, the biologists observed, the scout would wave the food aloft in its mouth for all to smell.
		However, the Cornell study did earn naked mole-rats one mark of distinction: Their newly identified recruitment chirp, issued by the food-bearing scouts on the way to the nest, brings to 18 the total number of different vocalizations.
	www.news.cornell.edu /Chronicle/96/11.21.96/mole-rats.html (717 words)

	IEEE endorses Chirp modulation: News from Nanotron Technologies
		The IEEE has selected Chirp modulation as one baseline for the new wireless standard 802.15.4a.
		Chirp modulation was developed by Nanotron Technologies and offers long range, high robustness and low power consumption.
		The advantages of Chirp technology are already available: the wireless network Nanonet offers maximum datarates of 2Mbit/s, maximum range of 900m (outdoors) and typically 60m (indoors) at 10mW output power.
	www.electronicstalk.com /news/not/not106.html (342 words)

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