Telecommunication theory

process of encoding information by varying properties of a periodic carrier waveform

thumb|right|In The Signal by William Powell Frith, a woman sends a signal by waving a white handkerchief.

models and analyzes data representations of physical events

difference between the upper and lower frequencies passed by a filter, communication channel, or signal spectrum

mathematical signal manipulation by computers

terrestrial frequency or virtual number over which a television station or television network is distributed

physical or logical connection used for transmission of information

process of mapping a continuous set to a countable set

theorem in signal processing describing discrete samples of a continuous signal

nonlinear electrical circuit that creates new frequencies from two signals applied to it

time required to receive a response to a query across a communication system

In electronics, crosstalk (XT) is a phenomenon by which a signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel. Crosstalk is usually caused by undesired capacitive, inductive, or conductive coupling from one circuit or channel to another.

tight upper bound on the rate at which information can be reliably transmitted over a communications channel

concept in statistics and wave theory

analyzed the detection of difficult to detect signals and provides a measure of the quality of the detection

signal processing device or process that removes unwanted components or features from a signal, or enhances wanted ones, or both

In reliability engineering, the term availability has the following meanings:

theorem that tells the maximum rate at which information can be transmitted

measure of wave reflectivity

limit on data transfer rate

information rate that can be transmitted over a given bandwidth

modulation scheme in telecommunication

a form of distortion affecting communication reliability

frequency domain representation of rapid, short-term, random fluctuations in the phase of a waveform, caused by time domain instabilities

The channel between upper and lower cutoff frequencies of a band system

form of filter

complex measure of the attenuation (real part) and phase angle (imaginary part) along the path travelled by a plane wave

events occurring regularly, or at equal time intervals

twice the bandwidth of a bandlimited function or channel

spectrally efficient pulse-shaping filter satisfying the Nyquist property, commonly used in communication systems

Parameter characterizing an AC conductor

Rule in telecommunications

ability of computer systems to exchange data with unambiguous, shared meaning

wavelength interval over which the magnitude of all spectral components is equal to or greater than a specified fraction of the magnitude of the component having the maximum value

term in physics

person, organization, or other entity that employs the services provided by a telecommunication system

condition to avoid intersymbol interference

linear filter in the time domain

signal analysis tool