802.11 uses the typical packet structure we have seen before with headers, payload data, frame identifiers, and so on. Starting with the PHY frame organization, we have three fields: a preamble, which assists in the synchronization phase, a PLCP header, which describes the packet configuration and characteristics such as data rates, and the MPDC MAC data.
Each IEEE 802.11 specification has a unique preamble and is structured by the number of symbols (described later) and not by the number of bits for each field. Examples of the preamble structures are as follows:
- 802.11 a/g: Preamble includes a short training field (two symbols) and a long training field (two symbols). These are used by the subcarriers for ...
