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quadrature
QAM
QAM Abbrev. for quadrature amplitude modulation
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15 to 510 MHz quadrature IF mixer and QPSK modulator. (intermediate frequency; quadrature phase shift keying) (Cover Story)
Magazine article from: Microwave Journal; 12/1/1990; 700+ words
; 15 to 510 MHz Quadrature IF Mixer and QPSK Modulator Introduction Conventional quadrature mixers and modulators have 10 percent to octave...systems. The wideband components available are quadrature phase shift keying (QPSK) modulators and...
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A MMIC quadrature IF mixer in L-band for use in portable, wireless networking applications.
Magazine article from: Microwave Journal; 8/1/1994; ; 700+ words
; A MMIC quadrature IF mixer (QIFM) circuit is implemented...V.sub.ds] = 0 V) devices. This quadrature mixer achieves 300 MHz RF input range in L-band and provides a pair of quadrature phase, DC coupled outputs. The measured...
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A digital quadrature IF mixer.
Magazine article from: Microwave Journal; 9/1/1998; 700+ words
; A digital quadrature IF mixer (DQIFM) combines two proven...conversion, providing an inphase and quadrature digital signal representation of the...two equal-amplitude in-phase/quadrature IF outputs. The DQIFM's functional...
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California Inventor Develops Quadrature Correction Method
News Wire article from: US Fed News Service, Including US State News; 10/6/2008; 480 words
; ...Capistrano, Calif., has developed a quadrature correction system. According to the...includes a mixer generating I and Q quadrature components. A phase detection circuit...phase error measurement between the I quadrature component and the Q quadrature component...
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Dutch Inventors Develop Quadrature Modulator
News Wire article from: US Fed News Service, Including US State News; 8/4/2006; 538 words
; ...of Den Haag, Netherlands, have developed a quadrature modulator and demodulator. According to the U.S. Patent & Trademark Office: "Quadrature demodulator and quadrature modulator which comprise a first oscillator...
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Option Pricing Via Quadrature Is a Pioneering Report That Will Enable You to Go Beyond BlackScholes Models to the Application of the Latest Quadrature Schemes.
M2 Presswire; 3/13/2008; 700+ words
; ...Research and Markets: Option Pricing Via Quadrature Is a Pioneering Report That Will Enable...Models to the Application of the Latest Quadrature Schemes(C)1994-2008 M2 COMMUNICATIONS...announced the addition of Option Pricing via Quadrature to their offering Aimed at advanced...
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Orthogonal Laurent polynomials and quadratures on the unit circle and the real half-line.
Magazine article from: Electronic Transactions on Numerical Analysis; 1/1/2005; ; 700+ words
; ...of this paper is the computation of quadrature formulas based on Laurent polynomials...required. Here the classical Gaussian quadrature is an extremely slow procedure. Key...orthogonal Laurent polynomials, L-Gaussian quadrature, Szego quadrature, three-term recurrence...
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Monolithic dual-quadrature mixer using GaAs FETs. (gallium arsenide field-effect transistors) (microwave mixer)
Magazine article from: Microwave Journal; 9/1/1990; ; 700+ words
; Monolithic Dual-Quadrature Mixer Using GaAs FETs Introduction...less than 10. The monolithic dual quadrature mixer (DQM) discussed in this article...signal to IF. The DQM uses Lange 3 dB quadrature couplers to transfer the LO and RF...
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New quadrature rules for Bernstein measures on the interval [-1,1].(Report)
Magazine article from: Electronic Transactions on Numerical Analysis; 1/1/2008; ; 700+ words
; ...Introduction. In this paper, we present quadrature rules for Bernstein measures on...rules have a fixed number of nodes and quadrature weights for each Bernstein measure...of the unit circle the existence of a quadrature rule for Bernstein-Szego measures...
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'Option Pricing Via Quadrature' Is a Pioneering Report That Will Enable You to Go Beyond Black-Scholes Models to the Application of the Latest Quadrature Schemes.
Business Wire; 3/13/2008; 700+ words
; ...announced the addition of Option Pricing via Quadrature to their offering. Aimed at advanced...moving beyond this established model to quadrature mathematics: numerical calculation...comparison of the various cutting-edge quadrature schemes - covering both stability and...
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quadrature
Book article from: The Columbia Encyclopedia, Sixth Edition
quadrature in astronomy, arrangement of two celestial...is one of the bodies, a planet is in quadrature when its elongation is 90°...from the earth, the half-moon is in quadrature to the sun. The inferior planets...
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quadrature amplitude modulation
Book article from: A Dictionary of Computing
quadrature amplitude modulation A system of modulation used in modems and communication channels that employs two carriers of identical frequency...
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Gaussian quadrature
Book article from: A Dictionary of Computing
Gaussian quadrature See numerical integration .
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adaptive quadrature
Book article from: A Dictionary of Computing
adaptive quadrature See numerical integration .
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Craig, John
Dictionary entry from: Complete Dictionary of Scientific Biography
...x201C; Method of Determining the Quadratures of Figures Bounded by Curves and Straight...x201C; Mathematical Treatise on the Quadratures of Curvilinear Figures ”...he offered me of his own accord the quadratures of two figures; these were the curves...
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