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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).
Resonance is a condition in which a vibrating system responds with maximum amplitude to a periodic driving force.Mechanical systems will have a number of possible frequencies at which this occurs. These are the system's natural frequencies of vibration.t breaks. So, the resonance frequency is the frequency with which some external source must exert a force (swinging legs, sound wave, wind pushing a bridge, etc.) so that each application of the force adds constructively.