Howtosignalprocessing
- What is a carrier signal in modulation?
- What is carrier transmission?
- Why carrier frequency is higher than modulating frequency?
What is a carrier signal in modulation?
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.
What is carrier transmission?
In carrier transmission, the band of frequencies that is lower than the carrier frequency. From: Modern Dictionary of Electronics (Seventh Edition), 1999.
Why carrier frequency is higher than modulating frequency?
To increase the energy of the signal we need to increase the frequency. This is achieved by multiplying the message signal with the carrier signal (with high frequency). this is when the carrier frequency is higher , and we noticed that bandwidth is just twice of the highest frequency of modulating signal.
