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20 MHz channels extend +/- 10 MHz. This mean the partially or completely overlap with two channels above and below. |
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20 MHz channels extend +/- 10 MHz. This mean the partially or completely overlap with two channels above and below. |
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https://www.arednmesh.org/sites/default/files/Device%20Selection%20Chart%20v1.0.xlsx |
Revision as of 07:50, 21 September 2022
List of WiFi channels.
Unlicensed Spectrum (USA only)
- 5.160 to 5.850 GHz - WiFi, often used by WISPs for end-user connections
- 5.925 to 7.125 GHz - WiFi 6E
San Francisco / Oakland / Berkeley
| Channel
|
Width (MHz)
|
Purpose
|
Notes
|
| 171
|
10
|
Cross Bay
|
|
| 173
|
20
|
Richmond / Berkeley / Oakland / Hayward
|
We should probably be using 174 to avoid overlap with 171 (see here)
|
| 175
|
10
|
Mount Diablo
|
|
| 177
|
10
|
Oakland / Berkeley
|
|
| 179
|
10
|
SFWEM
|
|
| 181
|
10
|
NALCO
|
|
| 183
|
10
|
NALCO
|
|
Notes
I confess that I don't understand how a band plan should work in a wifi network when we have a combination of tight point-to-point links with beam widths of 7° (beam diameter is ~1/8 the beam distance) with sectors with beam widths of 120° (beam diameter is ... massive).
San Carlos / San Bruno
| Channel
|
Width (MHz)
|
Purpose
|
Notes
|
| 171
|
10
|
|
|
| 173
|
10
|
|
|
| 175
|
10
|
|
|
| 177
|
10
|
|
|
| 179
|
10
|
|
|
| 181
|
10
|
|
|
| 183
|
10
|
|
|
Redwood City / Belmont
| Channel
|
Width (MHz)
|
Purpose
|
Notes
|
| 171
|
10
|
|
|
| 173
|
10
|
|
|
| 175
|
10
|
|
|
| 177
|
10
|
|
|
| 179
|
10
|
|
|
| 181
|
10
|
|
|
| 183
|
10
|
|
|
Mountain View / Sunnyvale / Palo Alto
| Channel
|
Width (MHz)
|
Purpose
|
Notes
|
| 171
|
10
|
|
|
| 173
|
10
|
|
|
| 175
|
10
|
|
|
| 177
|
10
|
|
|
| 179
|
10
|
|
|
| 181
|
10
|
|
|
| 183
|
10
|
|
|
Channels are defined to be 5 MHz wide, reaching 2.5 MHz above and below their center frequency. Most channels used by BAM are 10 MHz wide, so +/- 5MHz of their center frequency. This means we only use odd channel numbers as 10 MHz channels overlap with even channels.
20 MHz channels extend +/- 10 MHz. This mean the partially or completely overlap with two channels above and below.
https://www.arednmesh.org/sites/default/files/Device%20Selection%20Chart%20v1.0.xlsx