Channel Structure and LayoutChannel StructureRegulatory Rules and Operating ChannelsTransmission: Modulation and Guard IntervalModulation and Coding Set (MCS)Forward Error Correcting Codes in 802.11nGuard IntervalPLCP FramingHT Mixed Mode PLCP FormatHT Signal FieldData FieldTransmission and Reception Process802.11n SpeedComparison 1: 802.11a/g versus 1x1 11nComparison 2: 20 MHz versus 40 MHz channelsMandatory PHY Features