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Wireless Medium
802.11g:
•
Direct Sequence Spread Spectrum (DSSS) and Orthogonal Frequency Divisional Multiplexing (OFDM)
802.11a:
•
OFDM
Modulation
DSSS
•
Differential Binary Phase Shift Keying (DBPSK) @ 1 Mbps
•
Differential Quadrature Phase Shift Keying (DQPSK) @ 2 Mbps
•
Complementary Code Keying (CCK) @ 5.5 and 11 Mbps
OFDM
•
BPSK @ 6 and 9 Mbps
•
QPSK @ 12 and 18 Mbps
•
16-Quadrature Amplitude Modulation (QAM) @ 24 and 36 Mbps
•
64-QAM @ 48 and 54 Mbps
Frequency Bands
•
2.40 to 2.4897 GHz
•
5.15 to 5.35 GHz (FCC UNII 1 and UNII 2)
•
5.725 to 5.85 GHz (FCC UNII 3)
•
5.15 to 5.35 GHz (ETSI)
•
5.470 to 5.725 (ETSI)
•
5.15 to 5.25 GHz (Japan)
Delay Spread
•
350 ns @ 1 Mbps
•
300 ns @ 2 Mbps
•
200 ns @ 5.5 Mbps
•
400 ns @ 6 Mbps
•
250 ns @ 9 Mbps
•
130 ns @ 11 Mbps
•
250 ns @ 12 Mbps
•
220 ns @ 18 Mbps
•
160 ns @ 24 Mbps
•
100 ns @ 36 Mbps
•
90 ns @ 48 Mbps
•
70 ns @ 54 Mbps
Receive Sensitivity 802.11g (typical)
•
-94 dBm @ 1 Mbps
•
-93 dBm @ 2 Mbps
•
-92 dBm @ 5.5 Mbps
•
-86 dBm @ 6 Mbps
•
-86 dBm @ 9 Mbps
•
-90 dBm @ 11 Mbps
•
-86 dBm @ 12 Mbps
•
-86 dBm @ 18 Mbps
•
-84 dBm @ 24 Mbps
•
-80 dBm @ 36 Mbps
•
-75 dBm @ 48 Mbps
•
-71 dBm @ 54 Mbps
Receive Sensitivity 802.11a (typical)
5150 to 5250 MHz
•
-87 dBm @ 6 Mbps
•
-87 dBm @ 9 Mbps
•
-87 dBm @ 12 Mbps
•
-87 dBm @ 18 Mbps
•
-82 dBm @ 24 Mbps
5250 to 5350 MHz
•
-89 dBm @ 6 Mbps
•
-89 dBm @ 9 Mbps
•
-89 dBm @ 12 Mbps
•
-85 dBm @ 18 Mbps
•
-82 dBm @ 24 Mbps
5725 to 5805 MHz
•
-84 dBm @ 6 Mbps
•
-84 dBm @ 9 Mbps
•
-84 dBm @ 12 Mbps
•
-83 dBm @ 18 Mbps
•
-82 dBm @ 24 Mbps
5.470 -5.725 GHz
•
-87 dBm @ 6 Mbps
•
-87 dBm @ 9 Mbps
•
-87 dBm @ 12 Mbps
•
-87 dBm @ 18 Mbps
•
-82 dBm @ 24 Mbps
