<page_title> IEEE 802.11ac </page_title> <section_title> Data rates and speed </section_title> <table> <cell> 64-QAM <col_header> Modulation type </col_header> <col_header> 40 MHz channels </col_header> <col_header> 800 ns GI </col_header> </cell> <cell> 5/6 <col_header> Coding rate </col_header> <col_header> 40 MHz channels </col_header> <col_header> 400 ns GI </col_header> </cell> <cell> 256-QAM <col_header> Modulation type </col_header> <col_header> 40 MHz channels </col_header> <col_header> 800 ns GI </col_header> </cell> <cell> 3/4 <col_header> Coding rate </col_header> <col_header> 40 MHz channels </col_header> <col_header> 400 ns GI </col_header> </cell> <cell> 256-QAM <col_header> Modulation type </col_header> <col_header> 40 MHz channels </col_header> <col_header> 800 ns GI </col_header> </cell> <cell> 5/6 <col_header> Coding rate </col_header> <col_header> 40 MHz channels </col_header> <col_header> 400 ns GI </col_header> </cell> </table>
Modulation 256-QAM, rate 3/4 and 5/6, were added (vs. 64-QAM, rate 5/6 maximum in 802.11).