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IEEE [1] 802.11b [2] (WiFi) uses DSSS [3], using 22MHz of bandwidth
(passband) to transmit data with speeds of up to 11Mb/sec. A WiFi [4]
system can use any of 13 22MHz-wide sub-channels across the allocated
83.5MHz of the 2.4GHz frequency band, however most equipment commonly
available in Australia is designed for the 11 channel American market.
22MHz wide Direct Sequence Spread Spectrum, 5MHz channel spacing.
CHANNEL
MHZ
1
2412
2
2417
3
2422
4
2427
5
2432
6
2437
7
2442
8
2447
9
2452
10
2457
11
2462
12
2467
13
2472
As such, there are only three non-overlapping channels: 1, 7 & 11.
(Source: Queensland Digital Group)
Links:
------
[1] http://melbournewireless.org.au/?IEEE
[2] http://melbournewireless.org.au/?802.11b
[3] http://melbournewireless.org.au/?DSSS
[4] http://melbournewireless.org.au/?WiFi
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