carrier frequency


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carrier frequency

[′kar·ē·ər ‚frē·kwən·sē]
(communications)
The frequency generated by an unmodulated radio, radar, carrier communication, or other transmitter, or the average frequency of the emitted wave when modulated by a symmetrical signal. Also known as center frequency; resting frequency.

Carrier Frequency

 

the frequency of harmonic waves that are modulated by signals in order to transmit information. A wave at the carrier frequency is sometimes called a carrier wave, or a carrier. Waves at the carrier frequency do not, in themselves, contain any information; they only “carry” the information. In addition to the carrier frequency, the spectrum of modulated waves also includes the side frequencies, which contain the information being transmitted.

carrier frequency

The frequency of the alternating current carrier, which produces the electromagnetic waves that radiate from radio-transmitting antennae. The audio-frequency signals from the microphone modulate the carrier. It is the steady frequency of a modulated wave and is the same as that before modulation is applied.

carrier frequency

The transmission of a fixed frequency that has been altered (modulated) to "carry" data. The frequency is measured in Hertz (cycles per second). See carrier, Hz, FDM and TDM.
References in periodicals archive ?
we can also conclude that the energy leakage depends on the difference between the number of the carrier spacing, and the normal carrier frequency offset factor.
Example FFT measurements were able to verify that a linear FM chirp signal was shifting the carrier frequency as it should.
Figure 3(b) shows that carrier frequency was one of the main factors that influenced RF propagation in the soil medium.
Hong, "Effect of carrier frequency offset on performance of MCCDMA systems", IEEE Electronics Letters, Vol.
ETSI-EN301021 SEM (type G and F) and DVB-T GE06 SEM are applied and linear equations are derived to obtain the desired received power level of SEM at each point of spectral frequency offset from the desired center carrier frequency.
This suggests, in great contrast to the radiators of resonant systems, an absence of selection for any single carrier frequency.
All realisations of H were normalised by means of the Frobenius norm, eliminating the effect of the path loss at each carrier frequency.
Against the more advanced radars that use carrier frequency agility, the frequency measurement and signal generator frequency set-on must be accomplished with minimum delay (less than a pulse width).
In this paper, we propose a joint method for fast initial synchronization--transmission frame detection and integer carrier frequency offset estimation--and spectrum inversion detection in DRM Plus systems.
The VSOP98260 can receive any carrier frequency from 20 kHz to 60 kHz, and it operates on a supply voltage from 2.
The observed carrier frequency in those for whom ethnicity or country of origin was not provided was 1 in 37, which was not significantly different from the overall observed carrier frequency of 1 in 38 (P = 0.
The newly developed pulses become maximal when phase-matching with the original pulses is established, and their carrier frequency is close to that of the harmonics of the colliding pulses.