Why is carrier frequency high

We need the carrier waves of high frequency for distant communication because high frequency carrier waves travel with the speed of light and do not require a material medium to propagate. So, such types of waves are not obstructed by the earth's atmosphere.

1. Is carrier signal high frequency?
2. Why is the frequency of carrier wave is higher than that of data signal wave?
3. What generates the carrier frequency?
4. Why does the frequency of the carrier change?

Is carrier signal high frequency?

In telecommunications, a carrier wave, carrier signal, or just carrier, is a waveform (usually sinusoidal) that is modulated (modified) with an information-bearing signal for the purpose of conveying information. This carrier wave usually has a much higher frequency than the input signal does.

Why is the frequency of carrier wave is higher than that of data signal wave?

Hence the frequency of the carrier wave is higher as compared to the frequency of the modulating signal. Key Points: A low-frequency wave cannot be transmitted to long distances. So, a low-frequency information signal is superimposed on a high-frequency wave, which acts as a carrier of the information.

What generates the carrier frequency?

The carrier frequencies generated by oscillators at the transmitter and the receiver are usually not identical. The difference between the two carrier frequency is referred to as the carrier frequency offset (CFO).

Why does the frequency of the carrier change?

In frequency modulation, the carrier amplitude remains constant, but its frequency is changed in accordance with the modulating signal. Specifically, the higher the amplitude of the information signal, the greater the frequency change.