| Gönderen: |
"Robert Lalla" <os2-wireless_users@2rosenthals.com> |
Tam Ba?l?klar
Çözülmemi? ?leti |
| Gönderen: |
os2-wireless_users-owner <os2-wireless_users-owner@2rosenthals.com> |
| Konu: |
[OS2Wireless] signal strength |
| Tarih: |
Mon, 09 Jan 2006 20:04:23 +0100 (MEZ) |
| Alacak: |
"os2-wireless_users@2rosenthals.com" <os2-wireless_users@2rosenthals.com> |
|
|---|
On Fri, 06 Jan 2006 23:48:25 +0100, Christian Langanke wrote:
>the driver should report the signal strength within a certain value
>range, according to the NDIS interface specs, from -200 to -10.
Yes, in the Microsoft NDIS specification is written that signal strength
should be typically between -10 and -200 dBm.
Today I did some theoretical calculations, basically combining
Shannon's theorem and the Boltzmann formula for thermal noise:
The theoretical receive signal limit using ideal hardware and ideal
modulation methods for transmitting 1Mbit/s over a 22MHz channel is
-109.4dBm, for transmitting 54Mbit/s over a 22MHz channel is -88dBm.
Actual 802.11g hardware is reaching -92..-95dBm for 1Mbit/s and
-70..-75dBm for 54Mbit/s.
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