Direct-sequence spread spectrum: Revision history

30 July 2023

• curprev 14:4814:48, 30 July 2023‎ MüllerMarcus talk contribs‎ 6,110 bytes −6‎ →‎Transmission method: The despreading does only reduce power for non-perfectly correlated sequences. Especially, if the interferer's symbol rate == chip rate, the power reduction is low. undo
• curprev 14:4614:46, 30 July 2023‎ MüllerMarcus talk contribs‎ 6,116 bytes −224‎ →‎Transmission method: The positive comparison with FHSS w.r.t. pulse shaping doesn't work at all; the same power loss applies in both cases, and most channels that you use FHSS on are frequency-selective anyways, so that the system needs to be robust against that to begin with (not rely on amplitude or keep normalization per hop frequency, i.e. single-tap FD equalization) undo
• curprev 14:4414:44, 30 July 2023‎ MüllerMarcus talk contribs‎ 6,340 bytes −167‎ →‎Transmission method: fun fact: WORDS MATTER. DSSS is on symbols, not bits, what is perceived as audio static is not white at all (so, bad, but analogy, but irrelevant here->strike), the spectrum is only white if the sequence is chosen accordingly. Not all DSSS is with a bipodal sequence. Kill all the useless and mostly incorrect filler words, while we're at it. Not all filters are "bell shaped" (the fewest are) undo
• curprev 14:3414:34, 30 July 2023‎ MüllerMarcus talk contribs‎ 6,507 bytes +11‎ DSSS helps only against **narrowband** interferers. Interferers that are already wideband are not suppressed at all. undo
• curprev 14:3314:33, 30 July 2023‎ MüllerMarcus talk contribs‎ 6,496 bytes −60‎ Intro: incorrect wording. Corrected somewhat. Still not good. undo
• curprev 14:2914:29, 30 July 2023‎ MüllerMarcus talk contribs‎ 6,556 bytes −274‎ →‎Features: Numbered list titled "Features" now contains only a single point, which is already made elsewhere -> Strike. undo
• curprev 14:2914:29, 30 July 2023‎ MüllerMarcus talk contribs‎ 6,830 bytes −309‎ →‎Features: DSSS says nothing about knowledge at the receiver -> strike undo
• curprev 14:2814:28, 30 July 2023‎ MüllerMarcus talk contribs‎ 7,139 bytes −79‎ →‎Features: DSSS could be a phase modulation, but that's not generally the case -> strike. DSSS doesn't modulate a sine wave, which would hold no information -> strike. DSSS is at symbol, not at bit level. Spreading factors of 2 are commonly used, not "much shorter durations" -> strike. Symbol rate == baud rate != bit rate. undo
• curprev 14:2514:25, 30 July 2023‎ MüllerMarcus talk contribs‎ 7,218 bytes −71‎ →‎Features: There's nothing pseudorandom about e.g. Hadamard sequences. -> strike. Nothing continuous about a string, and it's not a string, but a sequence -> strike, replace. undo

26 July 2023

• curprev 18:5318:53, 26 July 2023‎ 117.217.150.177 talk‎ 7,289 bytes −24‎ Minor fix undo Tags: Mobile edit Mobile web edit
• curprev 18:4918:49, 26 July 2023‎ 117.217.150.177 talk‎ 7,313 bytes −744‎ First examples of spread spectrum predates the 1941 patent on FHSS. The page is about DSSS undo Tags: references removed Mobile edit Mobile web edit

14 May 2023

• curprev 20:0320:03, 14 May 2023‎ Egeymi talk contribs‎ 8,057 bytes −12‎ Filled in 1 bare reference(s) with reFill 2 undo

7 May 2023

• curprev 01:5901:59, 7 May 2023‎ Mako001 talk contribs‎ m 8,069 bytes +34‎ Tagging pages with bare URLs for citation, prior to follow up with tools (via WP:JWB) undo

16 April 2023

• curprev 23:1123:11, 16 April 2023‎ Citation bot talk contribs‎ 8,035 bytes +56‎ Add: title. Changed bare reference to CS1/2. | Use this bot. Report bugs. | Suggested by Mako001 | Linked from User:Mako001/Accesdatewithouturl3 | #UCB_webform_linked 1683/2079 undo

11 April 2023

• curprev 21:1221:12, 11 April 2023‎ WikiCleanerBot talk contribs‎ m 7,979 bytes −1‎ v2.05b - Bot T20 CW#61 - Fix errors for CW project (Reference before punctuation) undo Tag: WPCleaner

10 April 2023

• curprev 19:1519:15, 10 April 2023‎ 73.180.57.230 talk‎ 7,980 bytes +558‎ Added Credit for Hedy Lamarr and George Antheil regarding their 1941 patent. full info already available on Lamarr's page undo

20 January 2023

• curprev 00:1300:13, 20 January 2023‎ Kvng talk contribs‎ m 7,422 bytes 0‎ avoid unnec redirect undo

11 March 2022

• curprev 14:2314:23, 11 March 2022‎ 109.70.40.55 talk‎ 7,422 bytes +30‎ →‎Transmission method undo

21 November 2021

• curprev 19:4019:40, 21 November 2021‎ Comp.arch talk contribs‎ m 7,392 bytes −2‎ No edit summary undo Tag: 2017 wikitext editor

10 July 2021

• curprev 15:5215:52, 10 July 2021‎ Comp.arch talk contribs‎ m 7,394 bytes 0‎ No edit summary undo Tag: 2017 wikitext editor

14 June 2021

• curprev 17:4117:41, 14 June 2021‎ 108.28.57.112 talk‎ 7,394 bytes +25‎ Added radio-controlled Aeronautical and Marine vehicles under uses. undo Tag: Visual edit

22 April 2021

• curprev 15:4515:45, 22 April 2021‎ 163.158.132.63 talk‎ 7,369 bytes +33‎ pseudorandom binary sequence linked undo Tag: Visual edit

19 January 2021

• curprev 06:3506:35, 19 January 2021‎ Trishmapow talk contribs‎ m 7,336 bytes +17‎ No edit summary undo Tag: Visual edit

2 December 2020

• curprev 19:1719:17, 2 December 2020‎ MatUIsac talk contribs‎ 7,319 bytes +363‎ Added inventor undo Tag: Visual edit

1 May 2020

• curprev 08:5008:50, 1 May 2020‎ Myxomatosis57 talk contribs‎ m 6,956 bytes 0‎ No edit summary undo

21 April 2020

• curprev 13:5813:58, 21 April 2020‎ AndrewKay talk contribs‎ m 6,956 bytes 0‎ →‎Transmission method: fix typo: dispread -> despread undo

10 December 2019

• curprev 20:1120:11, 10 December 2019‎ 108.45.167.5 talk‎ 6,956 bytes 0‎ Corrected incorrect date. undo

30 November 2019

• curprev 15:1315:13, 30 November 2019‎ Arjayay talk contribs‎ m 6,956 bytes −4‎ Duplicate word removed undo

28 November 2019

• curprev 20:5020:50, 28 November 2019‎ 108.45.167.5 talk‎ 6,960 bytes −787‎ No edit summary undo Tag: references removed

2 November 2019

• curprev 22:4422:44, 2 November 2019‎ GliderMaven talk contribs‎ 7,747 bytes −18‎ →‎top: pointless tag undo

24 June 2019

• curprev 19:1119:11, 24 June 2019‎ ThecentreCZ talk contribs‎ 7,765 bytes +18‎ No edit summary undo

24 April 2019

• curprev 09:4709:47, 24 April 2019‎ LycoMacumba talk contribs‎ m 7,747 bytes −31‎ Link to a document was broken undo Tag: Visual edit

9 March 2019

• curprev 23:1023:10, 9 March 2019‎ Daviddwd talk contribs‎ 7,778 bytes +151‎ short desc undo Tag: Visual edit

15 November 2018

• curprev 07:5507:55, 15 November 2018‎ 94.65.216.254 talk‎ 7,627 bytes −1‎ →‎History undo

5 June 2018

• curprev 10:5910:59, 5 June 2018‎ 14.139.160.229 talk‎ 7,628 bytes −1‎ →‎Transmission method undo
• curprev 10:5810:58, 5 June 2018‎ 14.139.160.229 talk‎ 7,629 bytes +1‎ →‎Transmission method undo
• curprev 10:5710:57, 5 June 2018‎ 14.139.160.229 talk‎ 7,628 bytes +1‎ No edit summary undo
• curprev 10:5610:56, 5 June 2018‎ 14.139.160.229 talk‎ 7,627 bytes −1‎ →‎Transmission method undo

1 March 2018

• curprev 13:2613:26, 1 March 2018‎ 195.215.56.171 talk‎ 7,628 bytes −6‎ →‎Features undo

9 January 2018

• curprev 11:5011:50, 9 January 2018‎ ClueBot NG talk contribs‎ m 7,634 bytes −7‎ Reverting possible vandalism by 193.105.35.209 to version by Me, Myself, and I are Here. Report False Positive? Thanks, ClueBot NG. (3241404) (Bot) undo Tag: Rollback
• curprev 11:5011:50, 9 January 2018‎ 193.105.35.209 talk‎ 7,641 bytes +7‎ →‎Uses undo

1 September 2017

• curprev 05:3805:38, 1 September 2017‎ Me, Myself, and I are Here talk contribs‎ m 7,634 bytes 0‎ →‎See also: alpha undo

27 August 2017

• curprev 00:5000:50, 27 August 2017‎ MindlessXD talk contribs‎ 7,634 bytes −5‎ →‎Transmission method undo

6 August 2017

• curprev 10:1410:14, 6 August 2017‎ ClueBot NG talk contribs‎ m 7,639 bytes −32‎ Reverting possible vandalism by 2A02:810C:C140:2A95:14EB:1D41:F9AD:533B to version by Widefox. Report False Positive? Thanks, ClueBot NG. (3097985) (Bot) undo
• curprev 10:1410:14, 6 August 2017‎ 2a02:810c:c140:2a95:14eb:1d41:f9ad:533b talk‎ 7,671 bytes +32‎ Features undo Tag: Visual edit

5 February 2017

• curprev 12:1412:14, 5 February 2017‎ Widefox talk contribs‎ m 7,639 bytes +6‎ →‎top: bold alt article name per MOS undo

11 November 2016

• curprev 09:5509:55, 11 November 2016‎ Gouzmalix talk contribs‎ m 7,633 bytes +32‎ No edit summary undo Tag: Visual edit
• curprev 09:5009:50, 11 November 2016‎ Gouzmalix talk contribs‎ m 7,601 bytes −5‎ No edit summary undo
• curprev 09:4509:45, 11 November 2016‎ Gouzmalix talk contribs‎ m 7,606 bytes +51‎ revert undo
• curprev 09:4209:42, 11 November 2016‎ Gouzmalix talk contribs‎ 7,555 bytes −60‎ much needed refinements to summary undo Tag: Visual edit