Editing WiMAX (section)

=== Physical layer ===
The original version of the standard on which WiMAX is based ([[IEEE 802.16]]) specified a physical layer operating in the 10 to 66&nbsp;GHz range. 802.16a, updated in 2004 to 802.16-2004, added specifications for the 2 to 11&nbsp;GHz range. 802.16-2004 was updated by 802.16e-2005 in 2005 and uses scalable [[orthogonal frequency-division multiple access]]<ref>Orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies. OFDM has developed into a popular scheme for wideband digital communication, whether wireless or over copper wires, used in applications such as digital television and audio broadcasting.</ref> (SOFDMA), as opposed to the fixed [[orthogonal frequency-division multiplexing]] (OFDM) version with 256 sub-carriers (of which 200 are used) in 802.16d. More advanced versions, including 802.16e, also bring multiple antenna support through [[MIMO]]. (See [[WiMAX MIMO]]) This brings potential benefits in terms of coverage, self installation, power consumption, frequency re-use and bandwidth efficiency. WiMax is the most energy-efficient pre-4G technique among [[3GPP Long Term Evolution|LTE]] and [[HSPA+]].<ref>{{cite book |pages=1–7 |doi=10.1109/CTTE.2010.5557715 |chapter=Comparison of power consumption of mobile WiMAX, HSPA and LTE access networks |year=2010 |last1=Deruyck |first1=Margot |last2=Vereecken |first2=Willem |last3=Tanghe |first3=Emmeric |last4=Joseph |first4=Wout |last5=Pickavet |first5=Mario |last6=Martens |first6=Luc |last7=Demeester |first7=Piet |title=2010 9th Conference of Telecommunication, Media and Internet |isbn=978-1-4244-7988-7 |hdl=1854/LU-1001362 |s2cid=1974359 |url=https://biblio.ugent.be/publication/1001362 }}</ref>