modulate

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modulate

[′mäj·ə‚lāt]
(electronics)
To vary the amplitude, frequency, or phase of a wave, or vary the velocity of the electrons in an electron beam in some characteristic manner.

modulate

To insert a data signal into a carrier wave or direct current. See modulation.
References in periodicals archive ?
In the related research literature, there are two kinds of research trends for communication signal modulation classification.
The question that this essay is concerned with is: if 'modulation' is central to the concept of control societies, then what exactly is modulation, and how does it operate?
In bandwidth-limited system higher order modulations can be used because sufficient amount of power is required for them.
The real dependence resulted by equalizing the bit error probabilities in the case of the two modulations, BPSK and HOM.
The vibroacoustic modulation (VAM) method is based on the fact that a high-frequency ultrasound probing wave propagating in a structure is modulated by a low-frequency vibration.
The considered modulations such as PSK2, PSK4, PSK8, PSK16, PSK32, PSK64, QAM2, QAM4, QAM8, QAM 16, QAM 32, QAM 64, FSK2, FSK4, FSK8, FSK16, FSK32, and FSK64 are classified under the effects of AWGN channel.
It has been demonstrated by [2], that this type of modulation represents a remarkable improvement with respect to bandwidth, costs and codification.
Two-dimensional periodic modulations are utilized by the DRFP discussed in last sub-section, where a phase shifter and a DDS are needed.
When using modulations, we change our usable signal so that it will adapt to the transmission media.
If in multi-channel communication system for optical signal modulations different modulation formats are used, then obtained BER values for each channel will depend not only on the individual modulation format capability to resist from interchannel distortion, but also form that, which modulation format is used in the channel, which is the source of this disorders.
This paper presents a micro-nano Si/SiGe/Si double heterojunction electro-optic modulation structure, which can greatly improve the carrier injection concentration and decrease modulation voltage and loss.
Key words and phrases : Balian-Low Theorem, BMO, frames, Gabor systems, modulation spaces, time-frequency analysis, Poincare Inequality, Short-time Fourier transform, VMO, Zak transform