Editing IEEE 802.11 (section)

===802.11ac===
{{Main|IEEE 802.11ac}}
IEEE 802.11ac-2013 is an amendment to IEEE 802.11, published in December 2013, that builds on 802.11n.<ref name="80211ac-approved">{{cite web |url=http://standards.ieee.org/news/2014/ieee_802_11ac_ballot.html |title=New IEEE 802.11ac™ Specification Driven by Evolving Market Need for Higher, Multi-User Throughput in Wireless LANs |last=Kelly |first=Vivian |publisher=IEEE |date=2014-01-07 |access-date=2014-01-11 |url-status=dead |archive-url=https://web.archive.org/web/20140112011626/http://standards.ieee.org/news/2014/ieee_802_11ac_ballot.html |archive-date=2014-01-12 }}</ref> The 802.11ac standard was retroactively labelled as '''Wi-Fi 5''' by the Wi-Fi Alliance.<ref name="Wi-Fi Alliance® introduces Wi-Fi 6"/><ref name="Shankland"/> Changes compared to 802.11n include wider channels (80 or 160&nbsp;MHz versus 40&nbsp;MHz) in the 5&nbsp;GHz band, more spatial streams (up to eight versus four), higher-order modulation (up to 256-[[QAM]] vs. 64-QAM), and the addition of [[Multi-user MIMO]] (MU-MIMO). The Wi-Fi Alliance separated the introduction of ac wireless products into two phases ("waves"), named "Wave 1" and "Wave 2".<ref>{{cite web|url=https://www.xirrus.com/pdf/Wave2_Whitepaper.pdf|title=802.11AC WAVE 2 A XIRRUS WHITE PAPER}}</ref><ref>{{cite web|url=https://www.networkcomputing.com/wireless/80211ac-wi-fi-part-2-wave-1-and-wave-2-products/1614338859|title=802.11ac Wi-Fi Part 2: Wave 1 and Wave 2 Products}}</ref> From mid-2013, the alliance started certifying Wave 1 802.11ac products shipped by manufacturers, based on the IEEE 802.11ac Draft 3.0 (the IEEE standard was not finalized until later that year).<ref>{{cite web|url=https://cdn2.hubspot.net/hubfs/282305/Old/New%20Belden.com%20-%20Master%20Resources/blog-pdfs/white_paper_c11-713103.pdf|title=802.11ac: The Fifth Generation of Wi-Fi Technical White Paper|date=March 2014|website=Cisco|access-date=13 February 2020|archive-date=18 April 2023|archive-url=https://web.archive.org/web/20230418202027/https://cdn2.hubspot.net/hubfs/282305/Old/New%20Belden.com%20-%20Master%20Resources/blog-pdfs/white_paper_c11-713103.pdf|url-status=dead}}</ref> In 2016 Wi-Fi Alliance introduced the Wave 2 certification, to provide higher bandwidth and capacity than Wave 1 products. Wave 2 products include additional features like MU-MIMO, 160&nbsp;MHz channel width support, support for more 5&nbsp;GHz channels, and four spatial streams (with four antennas; compared to three in Wave 1 and 802.11n, and eight in IEEE's 802.11ax specification).<ref>{{cite web|url=https://www.rcrwireless.com/20160629/network-infrastructure/wi-fi/wi-fi-alliance-launches-802-11ac-wave-2-certification-tag6|title=Wi-Fi Alliance launches 802.11ac Wave 2 certification|website=RCR Wireless|date=29 June 2016}}</ref><ref name=techrepublic>{{cite web|url=https://www.techrepublic.com/article/6-things-you-need-to-know-about-802-11ac-wave-2/ |title=6 things you need to know about 802.11ac Wave 2 |website=techrepublic.com |date=2016-07-13 |access-date=2018-07-26}}</ref>