Methods and apparatus for generation of physical layer protocol data units for vehicular environments

A method for wireless communication in a vehicular communication network, the method comprising:

• selecting, at a communication device, a frequency bandwidth via which a physical layer (PHY) protocol data unit (PPDU) will be transmitted in the vehicular communication network, wherein the frequency bandwidth is selected from a set of permissible frequency bandwidths that includes a 10 MHz bandwidth and a 20 MHz bandwidth;
• selecting, at a communication device, a same compression mode for long training fields (LTFs) included in a PHY preamble and one or more PHY midambles of the PPDU;
• generating, at a communication device, the PPDU i) according to a downclocking ratio of 1/2, and ii) based on an orthogonal frequency division multiplexing (OFDM) numerology defined by an IEEE 802.11ac Standard, wherein the PPDU is generated to span the selected frequency bandwidth and to include a PHY preamble having a legacy preamble portion and a non-legacy preamble portion, and wherein:
• in response to the selected frequency bandwidth being 10 MHz, the PPDU is generated according to the downclocking ratio of 1/2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 20 MHz PPDUs, and
• in response to the selected frequency bandwidth being 20 MHz, the PPDU is generated according to the downclocking ratio of 1/2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 40 MHz PPDUs;
• and
• transmitting, by the communication device, the PPDU in the vehicular communication network;
• wherein generating the PPDU includes generating the PPDU to include i) the PHY preamble having one or more first LTFs generated according to the selected same compression mode, and ii) the one or more PHY midambles each having one or more respective second LTFs generated according to the same selected compression mode.