Howtosignalprocessing
- What is a pilot tone in FM?
- What is the function of pilot tone?
- What is pilot sequence?
- What is a LTE pilot signal?
What is a pilot tone in FM?
Pilot Frequency
In FM stereo broadcasting, a pilot tone of 19 kHz indicates that there is stereophonic information at 38 kHz (19×2, the second harmonic of the pilot). The receiver doubles the frequency of the pilot tone and uses it as a phase reference to demodulate the stereo information.
What is the function of pilot tone?
The pilot tone is the “secret code” that is embedded into the wireless signal. The wireless receiver must confirm the presence of the pilot tone in the transmitter signal before it will open the audio circuitry through the squelch controls.
What is pilot sequence?
Sequence control by means of a pilot cable is effected by means of a low-voltage supply from one contactor panel to the next, or by means of a line voltage pilot cable. Each contactor has an auxiliary contact that controls the supply to the next contactor.
What is a LTE pilot signal?
To facilitate the estimation of the channel characteristics, LTE uses cell-specific reference signals (pilot symbols) inserted in both time and frequency. These pilot symbols provide an estimate of the channel at given locations within a subframe.
