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 ?
References [22, 31] also analyze the range-angle coupling of the SIAR system and optimize the carrier frequency distribution from the viewpoint of Fisher information matrix, which can also be applied here.
For HFBs, the minimum SNR/SINR targets are higher, which show that the higher the carrier frequency the higher the sensitivity to high mobility.
Using S-band carrier frequency, and 3 channel model path model which has the direct component, and the second delay is 100ns, the longest diameter expansion 180ns delay.
In the simulation design, the OFU technique is used to transport three wireless MIMO signals with the same RF carrier frequency of 2.4 GHz or 5 GHz over fiber.
[n.sub.sync]: Synchronous speed of motor P: Number of poles [[omega].sub.ref] Reference speed [[omega].sub.r]: Rotor speed [[omega].sub.s]: Slip speed [[omega].sub.e]: Inverter command frequency [V.sub.abc]: Inverter output voltage [V.sub.abc*]: Inverter command voltage [f.sup.*]: Command frequency to inverter [V.sub.dc]: DC bus voltage of inverter f: Electrical frequency PI: Proportional integral controller e: Error signal [m.sub.a]: Modulation index [m.sub.f]: Frequency modulation ratio [f.sub.c]: Carrier frequency [f.sub.h]: Frequencies at which harmonics occur [f.sub.1]: Fundamental frequency.
3(a), the received signal strength decreased with the increase of carrier frequency. When the node burial depth of the receiving node was changed in a range of 30 cm-50 cm, the received signal strength remained at the highest level with relatively small changes.
Due to the fact that frequency offset values in intradyne receivers exceed the maximum theoretical limit of 1/(8T) [27] that can be reached by decision directed algorithms at the considered symbol rate (i.e., [+ or -] 5 GHz; see [28]), typical intradyne coherent optical receivers are provided with a coarse carrier frequency recovery (CCFR) stage [2] that minimizes or reduces to zero this frequency gap to values in the theoretical range.
We have introduced a wideband carrier frequency offset (WCFO) of 20 kHz for carrier frequency of 2 GHz.
where [P.sub.t] represents the transmitted power of the interferer in dBm, [G.sub.t] and [G.sub.r] denote the interference transmitter and victim receiver antenna gains in dBi, S is the attenuation due to spectrum emission mask for every carrier frequency offset, [DELTA]f, between the victim and interferer.
Through use of direct synthesis, the unit accurately creates wideband "bandwidth on demand" waveforms up to a 4.8 GHz carrier frequency with the new Option 02.
Through use of direct synthesis, the AWG7000C accurately creates wideband "bandwidth on demand" waveforms up to a 4.8 GHz carrier frequency with the new Option 02.