From: Till Wollenberg <till.wollenberg@uni-rostock.de>
To: ath9k-devel@lists.ath9k.org
Subject: [ath9k-devel] Raditotap overall RSSI vs per chain RSSI
Date: Fri, 26 Jun 2015 15:13:00 +0200 [thread overview]
Message-ID: <558D4FDC.20503@uni-rostock.de> (raw)
In-Reply-To: <CAP-AUyiZJSAHE+mU+z=huGTcJxDymxUcMrX3W6kNDS7Op0edsQ@mail.gmail.com>
Hi Brandon!
* On 22.06.2015 at 18:39 Brandon Enochs wrote:
> Can anyone explain how the overall RSSI is calculated versus the per chain
> RSSI? Sometimes, it seems to be the maximum of the per chain RSSI and other
> times it's none of them.
I'm not an expert in these things, but to me it looks like the "overall RSSI" is
just the (logarithmised) sum of the per-chain RSSIs. Here is an example taken
from a frame received by a two chain system:
Total SSI: -63 dBm
"Antenna 0": -67 dBm
"Antenna 1": -66 dBm
10 * log10( 10^(-6,7) + 10^(-6,6) ) = -63.46
Best regards
Till
prev parent reply other threads:[~2015-06-26 13:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-22 16:39 [ath9k-devel] Raditotap overall RSSI vs per chain RSSI Brandon Enochs
2015-06-26 13:13 ` Till Wollenberg [this message]
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