Carrier wave
In telecommunications, a carrier wave, carrier signal, 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 usually has a much higher frequency than the input signal does. The purpose of the carrier is usually either to transmit the information through space as an electromagnetic wave (as in radio communication), or to allow several carriers at different frequencies to share a common physical transmission medium by frequency division multiplexing (as, for example, a cable television system). The term is also used for an unmodulated emission in the absence of any modulating signal.
Words
This table shows the example usage of word lists for keywords extraction from the text above.
Word | Word Frequency | Number of Articles | Relevance |
---|---|---|---|
carrier | 7 | 7818 | 0.393 |
signal | 5 | 11524 | 0.264 |
wave | 5 | 12261 | 0.261 |
unmodulated | 2 | 15 | 0.219 |
frequencies | 2 | 2577 | 0.131 |