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In telecommunications, a carrier signal, carrier wave, or just carrier, is a waveform (usually sinusoidal) that is modulated (modified) with an input signal for the purpose of conveying information.This carrier wave is usually a much higher frequency than the input signal.n the case of single-sideband modulation (SSB), the carrier is suppressed (and in some forms of SSB, eliminated). The carrier must be reintroduced at the receiver by a beat frequency oscillator (BFO).
Frequencies. The frequencies or spectrum for cellular phones function much like radio stations on your dial. When you tune a radio to 91.7, for example; youâre actually tuning to a station broadcasting at 91.7-MHz. When you call someone on a mobile phone, youâre using the frequency assigned to that carrier. The difference between broadcast frequencies and cellular phone frequencies is that radio station signals will fade as you get farther away from the transmitter.