In telecommunications, a carrier refers to a company that provides telecommunications services. This commonly involves providing the infrastructure (e.g., cables, wireless networks, data centers) that allows people and devices to communicate. Carrier may also refer to a high-frequency signal that is modulated to carry information. A carrier signal's properties (amplitude, frequency, phase, or polarization) are modified to transmit the data. This is fundamental to radio communications, where a carrier wave is used to transmit audio or video signals over the air.
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