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
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
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
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
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
Watermark (redirect from Spread Spectrum Watermarking)
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
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
Phase-locked loop (section Spread spectrum)
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
Audio watermark (section Spread spectrum)
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
Radio-controlled helicopter (section Spread spectrum)
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
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
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
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
Video sender (section Spread-spectrum)
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
Channel allocation schemes (section Spread spectrum)
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
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
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
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
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
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