• 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 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) - 18:31, 10 February 2025
  • 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) - 04:34, 26 May 2025
  • 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 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) - 22:05, 25 May 2025
  • innovations such as trunked radio systems, spread spectrum, ultra-wideband, frequency reuse, dynamic spectrum management, frequency pooling, and cognitive...
    44 KB (2,942 words) - 14:16, 25 May 2025
  • The first successful embedding and extraction of a steganographic spread spectrum watermark was demonstrated in 1993 by Andrew Tirkel, Gerard Rankin...
    18 KB (2,264 words) - 15:53, 30 May 2025
  • 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...
    78 KB (7,705 words) - 21:28, 30 May 2025
  • 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
  • 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 (7,681 words) - 16:09, 24 May 2025
  • 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) - 22:42, 4 March 2025
  • 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...
    21 KB (2,213 words) - 15:47, 23 May 2025
  • also known as Trellis modulation Spread spectrum techniques Direct-sequence spread spectrum (DSSS) Chirp spread spectrum (CSS) according to IEEE 802.15...
    24 KB (3,051 words) - 11:37, 29 May 2025
  • 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
  • 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) - 11:34, 25 January 2025
  • 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
  • inexpensive, and should be given scheduling priority. In the uplink of a spread spectrum cellular system, the carrier-to-interference ratio (CIR) is held constant...
    5 KB (642 words) - 12:17, 7 August 2022
  • 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 Time-domain reflectometer
    complex signals and detect reflections with correlation techniques. See spread-spectrum time-domain reflectometry. The equivalent device for optical fiber...
    27 KB (3,589 words) - 22:30, 28 October 2024
  • Thumbnail for Chirp
    systems, and to other applications, such as in spread-spectrum communications (see chirp spread spectrum). This signal type is biologically inspired and...
    16 KB (2,295 words) - 18:24, 21 May 2025
  • 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 (2,325 words) - 21:57, 7 April 2025
  • Thumbnail for Frequency modulation
    spread spectrum, which uses extremely wide frequency deviations to achieve processing gains comparable to traditional, better-known spread-spectrum modes)...
    31 KB (4,003 words) - 13:29, 24 May 2025
  • interface. S-FSK (spread frequency-shift keying) is a modulation scheme that combines some of the advantages of classical spread-spectrum modulation (immunity...
    7 KB (1,127 words) - 23:44, 9 March 2025
  • Thumbnail for Multiplexing
    multiplexing techniques such as frequency-hopping spread spectrum (FHSS) and direct-sequence spread spectrum (DSSS). In wireless communications, multiplexing...
    22 KB (2,716 words) - 18:13, 24 May 2025
  • Jourdan, "Orthogonal multicarrier techniques applied to direct sequence spread spectrum CDMA systems," in Proceedings of Global Telecommunications Conference...
    8 KB (1,123 words) - 18:37, 22 February 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 Wireless network
    antenna device to relay calls from one area to the next area. Radio and spread spectrum technologies – Wireless local area networks use a high-frequency radio...
    32 KB (3,598 words) - 14:53, 25 May 2025
  • 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
  • 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 (4,725 words) - 06:11, 9 May 2025
  • 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 (3,340 words) - 03:28, 30 May 2025