Spread Spectrum
In telecommunication and radio communication, spread-spectrum techniques are methods by which a signal (e.g. an electrical, electromagnetic, or acoustic signal) generated with a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth. These techniques are used for a variety of reasons, including the establishment of secure communications, increasing resistance to natural interference, noise and jamming, to prevent detection, and to limit power flux density (e.g. in satellite downlinks).
Read more about Spread Spectrum: Spread-spectrum Telecommunications, Spread-spectrum Clock Signal Generation
Other articles related to "spread spectrum, spread, spectrum":
... In digital communications, chirp spread spectrum (CSS) is a spread spectrum technique that uses wideband linear frequency modulated chirp pulses to encode information ...
... used for each aircraft (except for 2.4 GHz systems which use spread spectrum modulation, described below) ... Newer Transmitters use spread spectrum technology in the 2.4 GHz frequency for communication ... Spread spectrum technology allows many pilots to transmit in the same band (2.4 GHz) in close proximity to each other with little fear of conflicts ...
... Soundcast employs Spread Spectrum technology ... principle ways this can be done Frequency Hopping Spread Spectrum (FHSS)—such as used by Bluetooth, and Direct Sequencing Spread Spectrum (DSSS)—such as used by 802.11b ...
... However, spread spectrum techniques use a transmission bandwidth that is several orders of magnitude greater than the minimum required signal bandwidth ... These systems were designed using spread spectrum because of its security and resistance to jamming ... Asynchronous CDMA has some level of privacy built in because the signal is spread using a pseudo-random code this code makes the spread spectrum signals appear random or have noise-like properties ...
... Spread-spectrum clock generation (SSCG) is used in some synchronous digital systems, especially those containing microprocessors, to reduce the spectral density of the ... by a clock signal and, because of its periodic nature, has an unavoidably narrow frequency spectrum ... digital systems radiate electromagnetic energy on a number of narrow bands spread on the clock frequency and its harmonics, resulting in a frequency spectrum that ...
Famous quotes containing the word spread:
“Isolate city spread alongside water,
Posted with white towers, she keeps her face
Half-turned to Europe, lonely northern daughter,
Holding through centuries her separate place.”
—Philip Larkin (1922–1986)