A method to be performed at a wireless communication station supporting directional multi-gigabit (DMG) transmissions according to Single Carrier (SC) physical layer (PHY) and an orthogonal frequency division multiplexing (OFDM) PHY, the method comprising: generating a frame to be transmitted by the wireless communication station, wherein in response to the frame being a OFDM frame, the frame to comprise a data portion to be modulated according to an OFDM PHY scheme and a plurality of fields, the plurality of fields comprising a Short Training Field , STF, a Channel Estimation Field , CEF, a first header , a second header ; wherein the first header comprises a first indication to indicate a presence of the second header , a first MCS value in a first MCS field , and a length value in a length field , and wherein the second header comprises an OFDM header for an OFDM packet including a second MCS value in a second MCS field ; setting the first indication to indicate a presence of the second header ; setting the first MCS value in accordance with an SC PHY scheme; setting the length value according to a length of the second header and the data portion; setting the second MCS value to indicate that the data portion is modulated according to the OFDM scheme; modulating the plurality of fields of the frame according to a Single Carrier, SC, scheme, the plurality of fields comprising the Short Training Field , STF, the Channel Estimation Field , CEF, the first header , and the second header ; modulating the data portion of the frame according to the OFDM scheme, in accordance with the second MCS value; and transmitting the frame via one or more directional links to communicate at a rate of multiple gigabits per second in a frequency band above 45 Gigahertz, GHz. generating a frame to be transmitted by the wireless communication station, wherein in response to the frame being a OFDM frame, the frame to comprise a data portion to be modulated according to an OFDM PHY scheme and a plurality of fields, the plurality of fields comprising a Short Training Field , STF, a Channel Estimation Field , CEF, a first header , a second header ; wherein the first header comprises a first indication to indicate a presence of the second header , a first MCS value in a first MCS field , and a length value in a length field , and wherein the second header comprises an OFDM header for an OFDM packet including a second MCS value in a second MCS field ; setting the first indication to indicate a presence of the second header ; setting the first MCS value in accordance with an SC PHY scheme; setting the length value according to a length of the second header and the data portion; setting the second MCS value to indicate that the data portion is modulated according to the OFDM scheme; modulating the plurality of fields of the frame according to a Single Carrier, SC, scheme, the plurality of fields comprising the Short Training Field , STF, the Channel Estimation Field , CEF, the first header , and the second header ; modulating the data portion of the frame according to the OFDM scheme, in accordance with the second MCS value; and transmitting the frame via one or more directional links to communicate at a rate of multiple gigabits per second in a frequency band above 45 Gigahertz, GHz. <EOS>