Typically, the channel bandwidth value is pre-defined by the standard. Possible values are 5, 10, or 20 MHz for example.
Is there any 802.11 wireless device (compatible with OpenWRT) capable of configuring a custom channel bandwidth?
For example, a 6.25 MHz channel bandwidth value.
Thanks!
Frequently asked, especially by those coming from a world with non-standard, vendor-proprietary hardware.
Thanks Jeff!
Looking at:
https://openwrt.org/docs/guide-user/network/wifi/basic
I found the parameter:
chanbw (integer) Specifies a narrow channel width in MHz, possible values are: 5 , 10 , 20
My case is even more special, because I'd like to be able to set a different value from the pre-defined ones and even non-integer values like 6.25 MHz.
I know it is possible since this OpenWRT-based product has this feature:
https://doodlelabs.com/products/industrial-iot-radio-platform/
It says: "Software defined channel size of 3~40 MHz for efficient re-use of spectrum", and I know it can be continuously (with non-integer values) adjusted.
But I don't know which hardware is used.
Hope someone help me finding this answer.
Regards!
I think you miss read the data sheet. For wifi it only supports 5,10 and 20Mhz channel width.
The 3-40MHz probably refers to other radio modules not wifi.
Honestly, I think the 3-40MHz does refer to Wi-Fi. Furthermore, Doodle claims to be able to adjust the guard interval lengh as well, suitable for bigger coverage areas.
Anyway, I found this hack, which allows changing the BW by reducing the chipset clock speed:
Is the data link used only for miitary UAV or like satellite phone is available to commercial private people ?
Is it expensive ?