Other uses refimprove date August 2010 A chirp is a signal information theory signal in which the frequency increases up chirp or decreases down chirp with time. In some sources, the term chirp is used ... chirp due to the dispersion optics dispersion of the materials they propagate through. Types of chirp Linear chirp In a linear chirp, the instantaneous phase Instantaneous frequency instantaneous frequency ... at time t 0 , and k is the rate of frequency increase or chirp rate . The corresponding time domain function for a sinusoidal linear chirp is math x t sin left 2 pi int 0 t f t , dt right sin left ... 300px A linear chirp waveform a sinusoidal wave that increases in frequency linearly over time Image LinearChirp.jpg thumb 300px Spectrogram of a Linear Chirp. The Spectrogram plot demonstrates the linear ... frequency and time. Listen filename Linchirp.ogg title Linear chirp description Sound example for linear chirp 5 repetitions . format Ogg In the frequency domain, the instantaneous frequency ... Spectrogram one can readily see that the linear chirp has spectral components at harmonics of the fundamental chirp. clear Exponential chirp In a geometric chirp , also called an exponential chirp , the frequency ... t sub 1 sub will also be constant. In an exponential chirp, the frequency of the signal varies exponential .... Unlike the linear chirp, which has a constant chirp rate, an exponential chirp has an exponentially increasing chirp rate. The corresponding time domain function for a sinusoidal exponential chirp is math ... f 0 frac k t 1 ln k right math File exponentialchirp.png thumb 300px An exponential chirp waveform ... Spectrogram of an exponential chirp. The exponential rate of change of frequency is shown as a function ... employed to generate the waveform. Listen filename Expchirp.ogg title Exponential chirp description Sound example for exponential chirp 5 repetitions . format Ogg As was the case for the Linear Chirp, the instantaneous frequency of the Exponential Chirp consists of the fundamental frequency math f t f ... more details
wiktionary chirp A chirp is a signal in which the frequency increases or decreases with time. Chirp may also refer to Chirp bird call , a common onomatopoeic word that describes certain bird calls Chirp phone , a walkie talkie service on Sprint Nextel s iDEN phones Chirp rubbing sound , a common onomatopoeic word that describes stridulation Chirp scratch , a type of scratch performed by turntablists Chirp, the annual Twitter developer s conference CHIRP Confidential Human Factors Incident Reporting Programme, a programme in the UK for aviators to report safety concerns http www.chirp.co.uk CHIRP Confidential Hazardous Incident Reporting Programme, a programme in the UK for mariners to report safety concerns Chirping, making denigrating comments towards a person in order to bother them Chirp filesystem , a user level file system for collaboration across distributed systems developed at the University of Notre Dame http www.cse.nd.edu ccl software chirp See also Chirping disambig ... more details
Unreferenced date December 2009 Orphan date December 2009 Chirp rate is the instantaneous rate of change of the frequency of a waveform. If a waveform is defined as math x t sin left phi t right math then the instantaneous phase Instantaneous frequency instantaneous frequency is defined to be math f t frac 1 2 pi frac d phi t dt math and the chirp rate is defined to be math c t frac 1 2 pi frac d 2 phi t dt 2 math . See also Chirp . DEFAULTSORT Chirp Rate Category Signal processing ... more details
unreferenced date February 2008 A chirp is Scratching scratch , a term used by Disc Jockey turntablists . It involves the use of record hand movement and the cross fader. Technique The scratch is somewhat difficult to perform because it takes a good amount of coordination. The scratch starts out with the cross fader open. The DJ then moves the Gramophone record record forward while simultaneously closing the previously opened channel ending the first sound . Then, in a reverse fashion, the DJ opens the channel while moving the record backwards creating a more controlled sounding baby scratch . Done in quick cession it sounds as though a chirp sound is being produced. Category DJing Hiphop stub ... more details
Image linear chirp.svg thumb 300px A linear frequency modulated upchirp in the time domain Chirp spread spectrum CSS is a spread spectrum technique that uses wideband linear frequency modulated chirp pulses to encode information. ref IEEE Computer Society, August 31, 2007 . IEEE Standard 802.15.4a 2007. New York, NY IEEE. ref A chirp is a sinusoidal signal whose frequency increases or decreases over a certain amount of time. Below is an example of an upchirp as you can see, the frequency increases linearly over time. Overview As with other spread spectrum methods, Chirp Spread Spectrum uses its entire allocated bandwidth to broadcast a signal, making it robust to channel noise. Further, because the chirps utilize a broad band of the spectrum, Chirp Spread Spectrum is also resistant to Multipath propagation multi path fading even when operating at very low power. However, it is unlike direct sequence spread spectrum DSSS or frequency hopping spread spectrum FHSS in that it does not add any ... on the linear nature of the chirp pulse. Additionally, Chirp Spread Spectrum is resistant to the Doppler ... 1973 . On the utility of chirp modulation for digital signaling, IEEE Transactions on Communications . Volume COM 21, 748 751. ref Uses Chirp Spread Spectrum was originally designed to compete with ultra ... Steel Mill Sensor Test slide 20 ref Chirp Spread Spectrum is ideal for applications requiring ... of up to 2 Mbit s higher than specified in 802.15.4a. ref Nanotron Technologies, 2007 . nanoNET chirp ... Keying Modulation DPSK to achieve better data rates. Modulation techniques Multiplex techniques Chirp ... groups the revenge of chirp spread spectrum.php The Revenge of Chirp Spread Spectrum , Military ... page http www.nanotron.com EN CO techn css.php Nanotron Chirp Spread Spectrum page http www.nanotron.com EN docs WP WP CSS.pdf Nanotron nanoNET Chirp Based Wireless Networks http www.ieee802.org 19 arc ... cdma Category Multiplexing Category Radio modulation modes Category Wireless locating de Chirp Spread ... more details
Infobox Television episode Title Chirp Series Modern Family Season 2 Episode 7 Airdate November 3, 2010 ref name ep07 cite web url http www.abcmedianet.com assets pr html 101810 08.html title Monday, October 18, 2010 ABC Television Network PRESS RELEASE ENTERTAINMENT MODERN FAMILY Chirp 11 3 author Chang, Yani date October 18, 2010 work ABCmedianet accessdate 2010 10 18 ref Production 2ARG03 Writer Dan O Shannon Director Michael Spiller Episode list List of Modern Family episodes Image Caption Guests Reid Ewing as Dylan Season list Infobox Modern Family season two episode list Prev Halloween Modern Family Halloween Next Manny Get Your Gun Chirp is the seventh episode of the Modern Family season 2 second season of Modern Family and the 31st episode overall. It originally aired on the American Broadcasting Company ABC in the United States on November 3, 2010. The episode was written by Dan O Shannon and directed by season two s main director, Michael Spiller . In the episode, Claire Julie ... s Jesse Tyler Ferguson wishes. Chirp received mostly positive reviews. According to the Nielsen Media Research , Chirp was seen by 12.21 million viewers and a 4.8 rating 7 share among adults between ... broadcast, Chirp was viewed by an estimated 12.21 million households and received a Nielsen ... of TV Squad stated in his review Chirp only generated one really big laugh for me probably because ... web url http www.tvguide.com tvshows modern family 2010 episode 7 season 2 chirp 297616 title Modern Family Episode Recap Chirp Season 2, Episode 7 author Klenc, Kara date November 4, 2010 work TV Guide ... FAMILY Chirp author Bowman, Donna date November 3, 2010 work The A.V. Club accessdate 2010 11 05 ref References reflist 2 External links http www.tv.com modern family chirp episode 1361779 summary.html?tag episode header next Chirp at TV.com http www.imdb.com title tt1627458 Chirp at Internet Movie Database http abc.go.com shows modern family episode detail unplugged 595243 Chirp at ABC.com Modern ... more details
Infobox film name Let Them Chirp Awhile image Let them chirp awhile.jpg caption Promotional film poster director Jonathan Blitstein writer Jonathan Blitstein producer Jonathan Blitstein br Anouk Frosch starring Justin Rice br Brendan Sexton III br Laura Breckenridge br Zach Galligan br Pepper Binkley br Charlotte af Geijerstam br Anthony Rapp music Giulio Carmassi cinematography Andrew Shulkind editor Jonathan Blitstein runtime 91 minutes country FilmUS language English Let Them Chirp Awhile is a 2007 independent drama comedy by Jonathan Blitstein , filmed in just eighteen days in New York City New York during October 2006. The film was produced by Anouk Frosch and Jonathan Blitstein. It was photographed by Andrew Shulkind. The release began December 5, 2008 in select theaters. ref http www.cinemavillage.com chc cv show movie.asp?movieid 1417 ref It received positive reviews in Variety ref http www.variety.com review VE1117939148.html?categoryid 31&cs 1&query let them chirp awhile ref , the Village Voice and TimeOut NY. Opening weekend in NYC had a sold out screening on Saturday December 6, 2008 with the cast in attendance for Q A. The film had its World Premiere at the 2007 Woodstock Film Festival in Woodstock, NY where it received acclaim from both audiences and critics. The director of the festival, Meira Blaustein called the film a a hidden gem and praised Blitstein s unique ... drama at the film s denouement. Let Them Chirp Awhile attempts to capitalize on this style while ... Solondz and Richard Linklater. Let Them Chirp Awhile is a mix of realism and romanticism. Scoring ... are heightened to meet the characters inflated visions of themselves. Let Them Chirp Awhile is as much ...?categoryid 31&cs 1&query let them chirp awhile http www.woodstockfilmfestival.com http 64.233.169.104 ... Chirp Awhile Official Website http movies.nytimes.com movie 418833 Let Them Chirp Awhile overview New ... index.php?type news&id 7520 CHUD.com Article From 08.31.06 imdb title 0857285 Let Them Chirp Awhile ... more details
Non free use rationale Description Theatrical poster for Let Them Chirp Awhile , Copyright 2008 by yelp. All Rights Reserved. Source http www.impawards.com 2008 let them chirp awhile.html Impawards.com Article Let Them Chirp Awhile Portion Small portion of commercial product Low resolution Yes Purpose Serves as cover art to identify the article s topic Replaceability No other information Licensing Non free poster ... more details
Summary Justin Rice and Brendan Sexton III on the set of Let Them Chirp Awhile . Photo by Honey Ballard. Copyright 2006 2008 Let Them Chirp Awhile, LLC THIS IS AN OFFICIAL PRESS STILL. Licensing PD self date December 2008 ... more details
The Chicago Independent Radio Project CHIRP is a non profit organization that operates a community radio station currently accessible via its Web site. The organization s stated goal is to provide Chicago residents with a community radio station focused on the representation of local people, events, and issues alongside a wide array of local and independent music. ref cite web url http chirpradio.org about title About CHIRP publisher chirpradio.org date 2010 06 13 ref CHIRP is also working to convince the Federal Communications Commission to remove existing barriers to the granting of low power FM radio licenses in urban areas. References Reflist colwidth 30em External links http www.chirpradio.org Category Radio organizations in the United States Category Organizations based in Chicago, Illinois ... more details
CZT can stand for Community Z Tools , a set of tools for the Z notation Cadmium zinc telluride , a semiconductor material Bluestein s FFT algorithm Chirp z transform algorithm , a signal processing algorithm disambig fr CZT it CZT ... more details
Other uses Chirp disambiguation Unreferenced date December 2009 In telecommunication , the term chirping has the following meanings 1. The rapid changing, as opposed to long term drifting, of the frequency of an electromagnetic wave . Chirping is most often observed in pulsed operation of a source. 2. A pulse compression technique that uses usually linear frequency modulation during the pulse. 3. A trademarked term in mobile communications used by Nextel and Boost Mobile for sending voice message s to a private number in push to talk or walkie talkie mode. See also Chirp Chirplet transform Category Signal processing Telecomm term stub ... more details
1988 starring Scott Beaudin as Peep br Jamie Watson actor Jamie Watson as Quack br Amanda Soha as Chirp ..., a duck , and Chirp, a American Robin robin . The current show, narrated by Joan Cusack is based on a National ... Peep, Quack, and Chirp as they meet a cat, a ladybug, a turtle and a frog who speaks from both sides ... the show for only season one. Overview Young viewers follow Peep, Chirp, and Quack as they investigate ... is a chick who lives in a can near a trash dump. Chirp Amanda Soha is a young, hydrophobe hydrophobic ... often mentions his high opinion of ducks. Chirp is often depicted as the most out spoken of the trio ... dead. Can Peep, Quack, and Chirp survive until spring? When the birds find a purple flower in the winter ... April 15, 2004 Current Events Peep borrows a toy boat from Nellie s yard and sets off with Chirp for the mysterious ... is gone Sounds Like... When Chirp hears a bird singing a beautiful song, she tries to show it to Peep ... A windy day makes Chirp long to fly, but when she accidentally gets aloft, she discovers it isn t as easy ... Ballmoon Chirp has a perilous adventure when she meets up with a big, red balloon. Bedtime Story Everyone .... Big Bird Chirp meets an adult robin who can sing, build nests, take baths, and fly Bridge the Gap The birds discover pine cones but must build a bridge to reach them. Chirp Builds a Nest Desperate to fly, Chirp wonders if building a nest will help her? Chirp s Flight Program Chirp s flying practice really takes off when she decides to copy what other birds do. Chirp Flies the Coop Chirp tries to decide whether to go south with Robin, or stay and face another dreary winter. Chirp Sorts It Out sort of Chirp s interest in collecting soon becomes a full fledged mania. Count Them Out Okay, so you ... his hat if Chirp finds a way to fly across his pond. The Deep Duck Woods It s not the Deep Dark Woods ... The birds figure out how to reach sunflower seeds. The Disappearing Drink Someone is stealing Chirp ... Newton The birds try leverage to right a flipped Newton. Flower Shower Chirp discovers a pink cherry ... more details
his hat and she is a little older than Chirp and Peep. Her body length is 34 inches and her ... stern to Chirp and she can chase Chirp and try to beat her up. She is always by Quack s side and always ... for a couple times. Quack has a huge crush on Tillie. He lives in a typical pond. Chirp voiced by Amanda ... stern to Chirp when the blue jays are around and all the time with Quack. Then, Tillie would chase Chirp ... . Tillie nicknames her Robin all the time because she thinks Chirp s a mad meanie to Quack and the blue ... McDonald A smart,wise, somewhat cocky robin who often helps out. She is friendly with Peep, Chirp ... tweet is usually very friendly, she can sometimes boast, and she sometimes tries to get Peep, Chirp ..., Quack Goes Nuts, and Chirp Sorts it Out Sort Of . Flying Bird A robin who has two friends just like herself. She told Chirp that she didn t need a nest to fly in Chirp Builds a Nest . She also told Peep ... is friendly with Peep and Chirp, but not with Quack. She appeared in many episodes in season 2. Hoot lives in the deep, dark woods. Hummingbird A hummingbird whom only Chirp understands. Quack 2 voiced ... bothers Peep, Quack, and Chirp about things that he finds in the garbage. He lives in a hollow ..., Chirp, Quack, and Tillie. He appeared in eight episodes A Duck s Tale, Quack s Tracks, Shadow ... more details
Two seismic reflection scans of a fault zone in the Gulf of Mexico . A. Chirp seismic reflection B. Water gun seismic reflection. Chirp seismic reflection show a likely mud volcano adjacent to the fault zone where near surface seismic reflection amplitudes are high and the seafloor is disrupted. Water gun data illustrate that the high amplitude reflections extend downward in two zones, one that projects steeply i.e., the master fault with likely gas fluid and another that projects laterally along apparent stratigraphy i.e., a potential gas fluid charged stratal unit . The fault zone has high backscatter at the sea floor, and is an area of likely upward migrating gases, fluids, and mobilized sediment, with contributions from the two subsurface high amplitude zones. Source PD USGov Interior USGS http geopubs.wr.usgs.gov open file of99 570 USGS Open File Report 99 570 Online Version 1.0 A seismic reflection investigation of gas hydrates and sea floor features of the upper continental slope of the Garden Banks and Green Canyon regions, northern Gulf of Mexico Report for cruise G1 99 GM 99002 By Alan Cooper, David Twichell, and Patrick Hart ... more details
, warble Okapi s cough, bellow Ostrich es chirpchirp Owl s hoot, scream, screech, shriek Oxen bellow ... dog s bark Puffin s moo Quelea s twitter, whistle, chirp, shriek, and squawk Rabbit s squeak, drum Raccoon s chitter Rat s squeak Raven s croak Rhinoceros Rhino s Bellow European robin Robin s chirp ... bleat , baa Snake s hiss Sparrow s chirp, twitter Squirrel s squeak Stag s bellow Swallow s twitter ... more details
Information Description The Great Britain national ice hockey team which won the gold medal at the 1936 Winter Olympics. Back row, left to right Percy Nicklin Coach , Bob Wyman, Archie Stinchcombe, Carl Erhardt Captain , Jack Kilpatrick, Gordon Dailley, Gerry Davey, Jimmy Chappell, Edger Chirp Brenchley, Johnny Coward. Front row, left to right Jimmy Borland, Art Child, Jimmy Foster, Alex Sandy Archer. Source http www.medhatxpats.com 1936 gb team 1936 20index.html Date 1936 Author Not known Permission see below other versions Licence PD UK ... more details
Image Wave chirp wavelet chirplet.png thumb 244px Comparison of wave , wavelet , chirp , and chirplet In signal processing , the chirplet transform is an inner product of an input signal with a family of analysis primitives called chirplets . Similarity to other transforms Much as in the wavelet transform , the chirplets are usually generated from or can be expressed as being from a single mother chirplet analogous to the so called mother wavelet of wavelet theory . What is the chirplet and chirplet transform? The term chirplet transform ref http wearcam.org chirplet vi91 index.htm ref was coined by Steve Mann , as the title of the first published paper on chirplets. The term chirplet itself apart from chirplet transform was also used by Steve Mann, Domingo Mihovilovic, and Ronald Bracewell to describe a windowed portion of a chirp function. In Mann s words ref http wearcam.org chirplet.htm ref quote A wavelet is a piece of a wave, and a chirplet, similarly, is a piece of a chirp. More precisely, a chirplet is a windowed portion of a chirp function, where the window provides some time localization property. In terms of time frequency space, chirplets exist as rotated, sheared, or other structures that move from the traditional parallelism with the time and frequency axes that are typical for waves Fourier and short time Fourier transform s or wavelet s. The chirplet transform thus represents a rotated, sheared, or otherwise transformed tiling of the time frequency plane. Although chirp signals have been known for many years in radar , pulse compression, and the like, the first ... concrete, chirp increase in frequency towards the right. c The chirplet transform is able to represent ... el 20056712 accessdate 2010 07 29 ref Signal processing Image processing SETI home uses chirp functions ... of chirp choice of window In either the fixed or adaptive case, the chirplets may be q chirplets ... chirp rate, as defined by the degree of perspective, or projection . The choice of window ... more details
Infobox Scientist name Sidney Darlington image Sidney Darlington.jpg birth date Birth date 1906 7 18 birth place Exeter, New Hampshire death date death date and age 1997 10 31 1906 7 18 death place Exeter, New Hampshire residence United States nationality United States American field Electrical engineering work institution alma mater doctoral advisor awards IEEE Medal of Honor Sidney Darlington July 18, 1906 &ndash October 31, 1997 was an electrical engineer and inventor of a transistor configuration in 1953, the Darlington transistor Darlington pair . He advanced the state of network theory , developing the insertion loss synthesis approach, and invented pulse compression chirp radar , bombsight s, and gun and rocket guidance . Darlington joined Bell Labs in 1929, where his first supervisor was Hendrik Wade Bode , and he remained there until he retired in 1971. In 1945, he was awarded the Presidential Medal of Freedom , the United States highest civilian honor, for his contributions during World War II. He was an elected member of the National Academy of Engineering , which cited his contributions to electrical network theory, radar, and guidance systems. In 1975, he received IEEE s Edison Medal For basic contributions to network theory and for important inventions in radar systems and electronic circuits and the IEEE Medal of Honor in 1981 For fundamental contributions to filtering and signal processing leading to chirp radar . He died at his home in Exeter, New Hampshire , USA, at the age of 91. Patents US patent 1991195 &mdash Wave Transmission Network US patent 2663806 &mdash Semiconductor signal translating devices. ed., Darlington Transistor US patent 2438112 &mdash Bombsight Computer US patent 2658675 &mdash Fire Control Computer US patent 2678997 &mdash Pulse Transmission chirp US patent 3008668 &mdash Rocket Guidance US patent 3265973 &mdash Two Port Network Synthesis US patent 3618095 &mdash Chirp Pulse Equalizer External links http www.nap.edu readingroo ... more details
Pepper Binkley is an United States American actress. Appearances Film Asylum Seekers film Asylum Seekers 2008 as Maud Eavesdrop film Eavesdrop 2007, to be released as Joceyln Let Them Chirp Awhile 2007, to be released as Michelle also audobook with the last song by nicholas sparks Television Fifteen TV show Fifteen known as Hillside in Canada 1990 , as Pepper . The Bedford Diaries 2006 , as April External links IMDb name 18665 Amg name 535494 http www.rada.org grad04 bin.html Profile at RADA . Persondata Metadata see Wikipedia Persondata . NAME Binkley, Pepper ALTERNATIVE NAMES SHORT DESCRIPTION DATE OF BIRTH PLACE OF BIRTH DATE OF DEATH PLACE OF DEATH DEFAULTSORT Binkley, Pepper Category American film actors Category American television actors Category Year of birth missing living people Category Living people US screen actor stub ... more details
unref date August 2009 Infobox Album See Wikipedia WikiProject Albums Name The Chronicles Type Album Artist E.S.G. Cover Released January 29, 2008 Recorded Genre Southern Rap Length Label SFL Records Producer Reviews Last album Screwed Up Movement br 2006 This album The Chronicles br 2008 Next album Digital Dope br 2009 The Chronicles is an album by southern rapper E.S.G. . Track listing Intro Crooked Streets Swangin & Bangin Flipping featuring Lil Will Ocean of Funk Birdies Don t Chirp I m The Boss Down Here Skit Watch Out Dirty Hustle Ride Wit Us Comin Down Southside Pop Trunk Ride Wit Us Remix Actin Bad Southside Baby DEFAULTSORT Chronicles Category 2008 albums Category E.S.G. albums 2000s hiphop album stub ... more details
The National Anthem of the Komi Republic is the official anthem of the Komi Republic , a republic of Russia . Komi Lyrics . . , , , , Russian Lyrics , , , , . , Translation Far, far away in the North The high taiga stands. There s a falcon s nest in the heart of the taiga, With joyous chirp of nestlings heard from it. Fly away, fearless falcons, Flap with your strong wings, And lead the Komi land to blissful life By the shortest track References http www.nationalanthems.us forum YaBB.pl?num 1182159965 Category Russian songs ... more details
Duplex perception refers to the natural language linguistic phenomenon whereby part of the sound acoustic signal is used for both a Speech communication speech and a nonspeech percept. A listener is presented with two simultaneous, Dichotic listening dichotic stimuli . One ear receives an isolated third formant transition that sounds like a nonspeech chirp. At the same time the other ear receives a base syllable . This base syllable consists of the first two formants , complete with formant transitions, and the third formant without a transition. Normally, there would be peripheral Auditory masking masking in such a binaural listening task but this does not occur. Instead, the listener s percept is duplex, that is, the completed syllable is perceived and the nonspeech chirp is heard at the same time. This is interpreted as being due to the existence of a special speech module. The phenomenon was discovered in 1974 by Timothy C. Rand at the Haskins Laboratories associated with Yale University . ref Rand TC. Dichotic release from masking for speech. J Acoust Soc Am. 55 3 678 80. PMID 4819869 ref Duplex perception was argued as evidence for the existence of distinct systems for general auditory system auditory perception and speech perception . ref Liberman AM, Isenberg D, Rakerd B. 1981 . Duplex perception of cues for stop consonants evidence for a phonetic mode. Percept Psychophys. 30 2 133 43. PMID 7301513 ref However, the same phenomenon can be obtained with slamming doors. ref Fowler CA, Rosenblum LD. 1990 . Duplex perception a comparison of monosyllables and slamming doors. J Exp Psychol Hum Percept Perform. 16 4 742 54. PMID 2148589 ref References reflist See also McGurk effect Category Auditory perception Category Hearing Category Phonetics Category Cognition phonetics stub psych stub ling stub ... more details
Bluestein s FFT algorithm 1968 , commonly called the chirp z transform algorithm 1969 , is a fast Fourier transform FFT algorithm that computes the discrete Fourier transform DFT of arbitrary sizes including prime number prime sizes by re expressing the DFT as a convolution . The other algorithm for FFTs of prime sizes, Rader s FFT algorithm Rader s algorithm , also works by rewriting the DFT as a convolution. In fact, Bluestein s algorithm can be used to compute more general transforms than the DFT, based on the unilateral z transform Rabiner et al. , 1969 . Algorithm Recall that the DFT is defined by the formula math X k sum n 0 N 1 x n e frac 2 pi i N nk qquad k 0, dots,N 1. math If we replace the product nk in the exponent by the identity nk &ndash k &ndash n sup 2 sup n sup 2 sup k sup 2 sup 2, we thus obtain math X k e frac pi i N k 2 sum n 0 N 1 left x n e frac pi i N n 2 right e frac pi i N k n 2 qquad k 0, dots,N 1. math This summation is precisely a convolution of the two sequences a sub n sub and b sub n sub of length N n 0,..., N &ndash 1 defined by math a n x n e frac pi i N n 2 math math b n e frac pi i N n 2 , math with the output of the convolution multiplied by N phase factors b sub k sub sup sup . That is math X k b k sum n 0 N 1 a n b k n qquad k 0, dots,N 1. math This convolution, in turn, can be performed with a pair of FFTs plus the pre computed FFT of b sub ... was dubbed the chirp z transform algorithm because, for the Fourier transform case z 1 , the sequence ... a linear chirp in radar systems. References Leo I. Bluestein, A linear filtering approach to the computation ... Record 10 , 218 219 1968 . Lawrence R. Rabiner, Ronald W. Schafer, and Charles M. Rader, The chirp z ..., Shafer, and Rader, The chirp z transform algorithm, IEEE Trans. Audio Electroacoustics 17 .... Lawrence Rabiner, The chirp z transform algorithm&mdash a lesson in serendipity, IEEE Signal ... FFT Algorithmus zh Chirp Z ... more details
Taxobox name Buff breasted Buttonquail image status EN status system IUCN3.1 regnum Animal ia phylum Chordate Chordata classis Bird Aves ordo Turniciformes familia Turnicidae genus Turnix species T. olivei binomial Turnix olivei binomial authority James Robinson Robinson , 1900 The Buff breasted Buttonquail is the largest and possibly the rarest of the buttonquail . This species is endemic to extreme northeastern Australia , in northern Queensland from near Coen to Mareeba west of Cairns . Description The Buff breasted Buttonquail measures from 18 23 inches 7 9 inches and usually weighs over 110 grams 4 oz . Both the tail and wings are short. The back is chestnut. The sides of the head are marked with chestnut on an otherwise plain gray head while the breast is warm buff colored. The Painted Buttonquail and the Brown Quail both coexist with this species. The Buff breasted is larger and longer legged than either and is quite different different from the all dark quail. The Painted species is almost totally mottled, with bold white spotting on the breast and no warm buff coloration. The most similar species to the Buff breasted is the Chestnut backed Buttonquail , which does not overlap in the wild. The advertising or booming call made by the female is ooom oom oom , repeated up to 20 times. The notes are almost inaudible initially, then become gradually louder, higher pitched and shorter until they are far carrying. The males will respond with a deep, rapid chu chu chu whistle. Other calls, perhaps in reaction to danger, include gug gug gug , a soft chirp chirp chirp and a loud kwaare kwaare . Distribution and habitat These birds favor lowland, subcoastal grasslands or woodlands. They may be found at any elevation to 400 m 1320 ft . Reports describe this species as dependent on grassy woods made up of Melaleuca , Acacia , Alphitonia and Tristania . They have been seen in area of heavy scrub ground cover, up to 1 m 3.3 ft high in some cases, but ca ... more details
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