quadrature modulation


Also found in: Acronyms.

quadrature modulation

[′kwä·drə·chər ‚mäj·ə′lā·shən]
(communications)
Modulation of two carrier components 90° apart in phase by separate modulating functions.
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References in periodicals archive ?
Direct quadrature modulation, as shown in Figure 4, is a common form of direct conversion used in the transmit path.
The previously shown example of a generic direct quadrature modulation transmit architecture can be used for any type of modulation.
REDUCED FILTER REQUIREMENTS USING AN ULTRA LOW NOISE MODULATOR
The model RF9958 IC offers quadrature modulation, transmit AGC amplification and upconversion in a single QSOP-28 plastic package, The models RF9957 and RF2667 ICs feature receive AGC amplification and quadrature demodulation in a single QSOP-24 plastic package.
Highly integrated IF ASICs for CDMA cellular/PCS telephones
This contributes to superior signal-to-noise ratio when transmitting a digitally encoded signal using quadrature modulation techniques such as IBOC DAB.
NAUTEL and Lucent Digital Radio Announce Joint Testing of Lucent's IBOC AM Broadcasting System
5 utilizes the existing I/Q modem from the PRISM II chip set, the HFA3783, which features all the necessary blocks for quadrature modulations and demodulation of "I" and "Q" baseband signals.
Intersil's PRISM 2.5 Chip Set Enables Smaller Form Factor WLAN Solutions

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