Source: Strategy Analytics Inc. (chart by RF Cafe)
WLAN Spectral Masks (802.11a/b/g)
Wireless Spectrum Chart, by QRC Technologies
| Access Method |
CSMA/CA, SSMA |
CSMA/CA |
TDMA/EY-NPMA |
TDMA/TDD |
| Modulation |
CCK (8 complex chip spreading) |
64 QAM-OFDM 16 QAM-OFDM QPSK-OFDM BPSK-OFDM |
GMSK/FSK |
64 QAM-OFDM 16 QAM-OFDM QPSK-OFDM BPSK-OFDM |
| Data Rate (Mbits/s) |
1, 2, 5.5 and 11 |
6, 9, 12, 18, 24, 36, 48 and 54 |
23 (HBR) 1.4 (LBR) |
6, 9, 12, 18, 27, 36, 48 and 54 |
| Frequency Band (MHz) |
2,400 to 2,483.5 |
5,150 to 5,250 5,250 to 5,350 5,725 to 5,825 |
5,150 to 5,300 limited in some countries to 5,150 to 5,250 |
5 GHz bands currently under study |
| Channelization |
25/30 MHz spacing 3 channels |
20 MHz channel spacing |
23.5294 MHz (HBR) 3 channels in 100 MHz and 5 channels in 150 MHz 1.4 MHz (LBR) |
20 MHz channel spacing 4 channels in 100 MHz |
| Transmit Power |
1,000 mW EIRP 100 mW EIRP 10 mW/MHz EIRP |
5,150 to 5,250 10 mW/MHz 200 mW EIRP in 20 MHz channel
5,250 to 5,350 1 W EIRP
5,725 to 5,8254 W EIRP |
Three different classes of power levels depending on country administration
1 W EIRP 100 mW EIRP 10 mW EIRP |
Power limits currently under study |
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