Chapter 2

802.11 Physical (PHY) Layer Frame Format

In this chapter, you will learn about the following:

  • Physical Layer Operations
    • Carrier Sense/Clear Channel Assessment(CS/CCA)
    • Transmit (Tx)
    • Receive (Rx)
  • Physical Layer
    • PLCP Service Data Unit
    • PLCP Protocol Data Unit
    • Physical Media Dependent
  • PLCP Protocol Data Unit
    • PLCP Preamble
    • Long PPDU Preamble
    • Short PPDU Preamble
    • OFDM PLCP Preamble
    • PLCP Header
    • 802.11n PPDUs
    • Non-HT Legacy PPDU
    • HT Mixed PPDU
    • HT Greenfield PPDU
    • Data Field
  • 2.4 GHz Communications
    • 2.4 GHz Channels
  • 5 GHz Communications
    • UNII-1 (Lower Band)
    • UNII-2 (Middle Band)
    • UNII-2 Extended
    • UNII-3 (Upper Band)
    • 5 GHz Channels
  • Adjacent, Nonadjacent, and Overlapping Channels
  • Clause 14 FHSS PHY
    • Hopping Sequence
    • Dwell Time
    • Hop Time

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