A continuous signal, or waveform, at a certain frequency on a circuit, or within a certain frequency range, and that can be modulated to support an information-bearing signal.
A single communications patch in a transmission medium connecting two or more points in a network, each patch being separated by some means; e.g., spatial or multiplex separation, such as frequency or time division multiplexing.
The range of frequencies over which two frequency components remain a strong amplitude correlation. Physically, it defines the range of frequencies over which the channel can be considered "Flat".
A form of conditioning that reduces the frequency distortion or phase distortion, or both, in an electrical signal on a metallic conductor or in a radio signal traveling through the atmosphere.
The reduction in signal intensity of one or several of the components of a radio signal, typically caused by the reflective or refractive effects of multi-path.
The return of a portion of the output, or processed portion of the output, of a (usually active) device to the input.
A transmission method that uses separate channels for the uplink and downlink (transmit and receive).
The domain for analysis of mathematical functions or signals with respect to frequency, rather than time.
