[PATCH] Per chain RSSI reporting

Ben Greear greearb at candelatech.com
Sat May 27 14:49:56 PDT 2017

On 05/27/2017 02:41 PM, Norik Dzhandzhapanyan wrote:
> Yes ~6dB

If a packet is sent on 1 chain with ath10k firmware (9880 hardware, specifically, but probably
others as well), it will be around 6db higher on that particular chain
than if the rate-control sends it on all three chains.

Are you measuring on a single chain, or on all of the chains at once and adding
the power?

I think we would need more detailed reporting using a good third-party device before
smoothing and RSSI.


> From: Ben Greear
> Sent: Saturday, May 27, 2:38 PM
> Subject: Re: [PATCH] Per chain RSSI reporting
> To: Norik Dzhandzhapanyan, Adrian Chadd
> Cc: ath10k at lists.infradead.org, linux-wireless at vger.kernel.org
> On 05/27/2017 12:25 PM, Norik Dzhandzhapanyan wrote: > We see this inconsistent/incorrect reporting in our RF chamber. How different are the values, and did you sniff with a third-party device to see if it sees the same spikes in RSSI? Thanks, Ben > > Norik > > On 05/27/2017 09:39 AM, Adrian Chadd wrote: >> On 27 May 2017 at 09:07, Ben Greear wrote: >>> At low encoding rates, especially if it switches to a single-chain encoding, >>> maybe the on-air signal really is stronger? >>> >>> Have you verified in some other manner than the signals reported by ath10k >>> are >>> wrong? >> Hiya, >> >> So yeah, multipath, higher TX rates == weaker TX signal, TPC, etc are >> all interesting to know about at the receiver. it's hard to separate >> that out from the noise sometimes, but in some controlled deployments >> its really obvious. >> >> >> >> -adrian >> >> > > > The contents of this transmission are Ethertronics Inc. Confidential and may contain proprietary or legally privileged
> information which may not be disclosed, copied or distributed without the express written consent of Ethertronics Inc. The information is intended to be for the use of the individual or entity named on this transmission. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited. If you have received this transmission in error, please notify us by telephone immediately so that we can arrange for the retrieval of the original documents at no cost to you. Alternatively, notify the sender by replying to this transmission and delete the message without disclosing it. Thank you > -- Ben Greear Candela Technologies Inc http://www.candelatech.com

Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

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