• Thumbnail for Spread spectrum
    In telecommunications, especially radio communication, spread spectrum are techniques by which a signal (e.g., an electrical, electromagnetic, or acoustic)...
    16 KB (1,934 words) - 23:57, 15 September 2024
  • Thumbnail for Frequency-hopping spread spectrum
    Frequency-hopping spread spectrum (FHSS) is a method of transmitting radio signals by rapidly changing the carrier frequency among many frequencies occupying...
    15 KB (1,921 words) - 01:41, 3 August 2024
  • Thumbnail for Direct-sequence spread spectrum
    In telecommunications, direct-sequence spread spectrum (DSSS) is a spread-spectrum modulation technique primarily used to reduce overall signal interference...
    6 KB (701 words) - 18:24, 4 September 2024
  • Thumbnail for Chirp spread spectrum
    In digital communications, chirp spread spectrum (CSS) is a spread spectrum technique that uses wideband linear frequency modulated chirp pulses to encode...
    6 KB (709 words) - 14:31, 18 September 2024
  • Thumbnail for Code-division multiple access
    permit this without undue interference between the users, CDMA employs spread spectrum technology and a special coding scheme (where each transmitter is assigned...
    36 KB (4,745 words) - 20:54, 27 October 2024
  • dispersion Seafloor spreading, the process leading to continental drift Spread spectrum, communications signals over a range of frequencies Spread Toolkit - an...
    3 KB (379 words) - 08:12, 17 February 2024
  • A watermark is an identifying image or pattern in paper that appears as various shades of lightness/darkness when viewed by transmitted light (or when...
    10 KB (1,179 words) - 12:45, 6 October 2024
  • innovations such as trunked radio systems, spread spectrum, ultra-wideband, frequency reuse, dynamic spectrum management, frequency pooling, and cognitive...
    44 KB (2,900 words) - 14:47, 19 November 2024
  • Thumbnail for Process gain
    In a spread-spectrum system, the process gain (or "processing gain") is the ratio of the spread (or RF) bandwidth to the unspread (or baseband) bandwidth...
    2 KB (288 words) - 04:58, 12 February 2024
  • designer can use a spread-spectrum PLL to reduce interference with high-Q receivers by spreading the energy over a larger portion of the spectrum. For example...
    52 KB (7,669 words) - 23:43, 15 September 2024
  • and ownership verification. One technique for audio watermarking is spread spectrum audio watermarking (SSW). In SSW, a narrow-band signal is transmitted...
    4 KB (472 words) - 19:27, 13 October 2023
  • Thumbnail for Radio-controlled helicopter
    reliable than the new spread spectrum protocols. Systems such as Spektrum and JR use the DSM2 and later, DSMX direct-sequence spread spectrum (DSSS) method,...
    27 KB (3,334 words) - 19:01, 18 August 2024
  • Thumbnail for Hedy Lamarr
    co-invented a radio guidance system for Allied torpedoes that used spread spectrum and frequency hopping technology to defeat the threat of radio jamming...
    76 KB (7,469 words) - 11:11, 22 November 2024
  • frequency-hopping spread spectrum (FHSS), where the channel frequency is changed rapidly according to a sequence that constitutes the spreading code. As an...
    18 KB (2,314 words) - 16:52, 31 October 2024
  • Spread-spectrum time-domain reflectometry (SSTDR) is a measurement technique to identify faults, usually in electrical wires, by observing reflected spread...
    5 KB (498 words) - 21:08, 6 July 2024
  • Thumbnail for LoRa
    communication technique. It is based on spread spectrum modulation techniques derived from chirp spread spectrum (CSS) technology. It was developed by Cycleo...
    20 KB (2,183 words) - 14:55, 20 November 2024
  • Thumbnail for EXtreme Radio Service
    low power communication 915 MHz band, and employ frequency-hopping spread spectrum FM technology to attempt to address some of the perceived shortcomings...
    3 KB (470 words) - 11:36, 12 July 2022
  • Thumbnail for Video sender
    technologies exist, including analogue wireless (radio), digital wireless (spread-spectrum, Wi-Fi, ultra-wideband) and digital wired (power-line communication)...
    11 KB (1,440 words) - 15:15, 30 October 2024
  • Dynamic: DCA, dynamic channel allocation DFS, dynamic frequency selection Spread spectrum In Fixed Channel Allocation or Fixed Channel Assignment (FCA) each...
    11 KB (1,455 words) - 10:42, 2 July 2023
  • Thumbnail for Electromagnetic compatibility
    design. High peaks at single frequencies can be avoided by using the spread spectrum method, in which different parts of the circuit emit at different frequencies...
    26 KB (3,278 words) - 04:28, 28 July 2024
  • Chip (CDMA) (redirect from Spread factor)
    In digital communications, a chip is a pulse of a direct-sequence spread spectrum (DSSS) code, such as a pseudo-random noise (PN) code sequence used in...
    2 KB (280 words) - 15:13, 23 September 2024
  • Thumbnail for Spectrum analyzer
    A spectrum analyzer measures the magnitude of an input signal versus frequency within the full frequency range of the instrument. The primary use is to...
    31 KB (3,808 words) - 11:26, 14 October 2024
  • Thumbnail for George Antheil
    frequency hopping, between the transmitter and receiver. It is one of the spread spectrum techniques that became widely used in modern telecommunications. This...
    41 KB (4,671 words) - 17:51, 19 November 2024
  • method of spread-spectrum communication. When used only for the spread-spectrum property, this technique is called direct-sequence spread spectrum; when used...
    38 KB (4,747 words) - 09:40, 16 October 2024
  • machines. In spread-spectrum systems, the receiver correlates a locally generated signal with the received signal. Such spread-spectrum systems require...
    5 KB (609 words) - 17:23, 13 September 2024
  • Thumbnail for SATA Express
    support for the so-called separate reference clock with independent spread spectrum clocking (SRIS) with some of its pre-production SATA Express hardware...
    32 KB (3,251 words) - 04:46, 18 November 2024
  • spectrum (also known as free spectrum) is a movement to get the Federal Communications Commission to provide more unlicensed radio-frequency spectrum...
    4 KB (467 words) - 20:20, 23 August 2023
  • also allocated to ISM. [1] In the U.S., the FCC first made unlicensed spread spectrum available in the ISM bands in rules adopted on May 9, 1985. The FCC...
    24 KB (2,356 words) - 21:30, 14 November 2024
  • 2. Gold-Folgen" [Gold sequences]. Handbuch der Spread-Spectrum Technik [Handbook of the spread-spectrum technique] (in German) (1 ed.). Vienna, Austria:...
    6 KB (551 words) - 00:19, 16 September 2024
  • Thumbnail for Wi-Fi
    versions of Wi-Fi use different techniques, 802.11b uses direct-sequence spread spectrum on a single carrier, whereas 802.11a, Wi-Fi 4, 5 and 6 use orthogonal...
    123 KB (13,037 words) - 14:00, 18 November 2024