digital modulation


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digital modulation

[′dij·əd·əl ‚mäj·ə′lā·shən]
(communications)
A method of placing digital traffic on a microwave system without use of modems, by transmitting the information in the form of discrete phase or frequency states determined by the digital signal.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

digital modulation

The altering of a carrier by a digital signal. See modulation and carrier.
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References in periodicals archive ?
Hierarchical digital modulation classification using cummulants IEEE Trans.
Digital modulation is an important factor in communication system.
Suppose that the signal serial is independent identically distributed, and that E is the signal energy, the fourth order cumulants' theoretical values of the common digital modulation signals are shown in Table 1 [17-19].
Covering first modulation and detection, then information theory and coding schemes, they discuss such topics as wireless channels, digital modulation techniques, data-aided algorithms for channel estimation, elements of information theory, classical and modern coding schemes, and combined equalization and decoding.
This move towards a faster, higher volume service has been facilitated by an upgrade of the digital modulation scheme of the KA-SAT infrastructure, from 8PSK[2] to 16APSK, generating a significant increase in the system's total throughput.
Many of modern communication systems are based on wireless technologies which use different digital modulation techniques.
Data conversion and signal processing technology company Analog Devices Inc (ADI) introduced on Monday the AD9128, a 16-bit, 1.25-GSPS transmit D/A converter (DAC) with integrated complex digital modulation functionality and featuring a JESD204A-compatible serial input.
And QAM, or quadrature amplitude modulation, is an analog and digital modulation scheme that conveys data by changing some aspect of a carrier signal, or wave, (usually a sinusoid) in response to a data signal.
RF directional modulation technique is proposed for the physical layer secure communication in the paper [1-5], which synthesizes a digital modulation signal fully or partially in the RF portion of the transmitter.

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