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Explain the WLAN physical layer frame as per 802.11a?
WLAN testing FAQ
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Explain the WLAN physical layer frame as per 802.11a?
WLAN has physical layer frame formats different in 11a, 11b, 11g, 11n and 11ac. They all have three generic fields i.e. preamble, header and data payload (PSDU). Preamble carries STF (short training field) and LTF (long training field) used for front end synchronization. Front end synchronization includes time offset estimation and correction; frequency offset estimation and correction and channel estimation and equalization. Header carries two important parameters rate and length. Rate specify modulation-code rate of the data payload part and length field specify length of data payload in units of OFDM symbol. Refer WLAN frame structure to know more about 11a,11b,11n,11ac frames and WLAN MAC layer protocol to know about various frames exchanged between STA and AP.
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