What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) in IEEE 802.11 WLANs?

Question

Options

• A802.11a and 11n use six (6) "pilot" subcarriers as a reference for the receiver to detect frequency and
• B802.11a/g/n OFDM includes several combinations of modulation and coding to achieve data rates from
• CWith 802.11a OFDM, 16-QAM provides either 48 or 54 Mbps data rates, depending upon coding rates.
• D802.11n HT-OFDM utilizes 256-QAM, which increases the data rate from 54 Mbps (with 64- QAM) up
• EIn 802.11a OFDM, forty-eight (48) subcarriers are used as parallel symbol transmission paths to carry data.

• A
  7% (3)
• B
  2% (1)
• C
  14% (6)
• D
  2% (1)
• E
  75% (33)

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