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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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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.
REDUCED FILTER REQUIREMENTS USING AN ULTRA LOW NOISE MODULATOR
FM signal generation is an all-analog process; wideband FM signals may be produced by quadrature modulation followed by frequency multiplication
A flexible upconverter/signal generator to support communication and radar systems
Telephone designers chose to remove quadrature modulation and demodulation functions from the baseband ASICs and place them in the analog BF/IF chips to alleviate mixed-signal isolation issues and allow for lower power CMOS designs.
Highly integrated IF ASICs for CDMA cellular/PCS telephones

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