Siemens IEEE802.11 - Manual (Page 23)

, © Siemens, 2002
IEEE802.11a 5GHz PHY Layer
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Specifications
– Modulation type OFDM
– Data rates: 6, 12, 18, 24, 36, 48, 54Mbps
– 48 sub-carriers
– Sub-carrier modulation: BPSK, QPSK, 16QAM, 64QAM
– Bit interleaved convolutional coding, K=7, R=1/2, 2/3, 3/4
– OFDM frame duration: 4µs guard interval: 0.8ms
– 18MHz channel spacing, 9-10 channels in 200MHz bandwidth
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Key milestones
– First letter ballot by working group from November 1998 meeting
– January 1999 joint meeting with ETSI-BRAN