Re: Fwd: Cannot achieve throughput higher than 460Mbps using CT firmware and 3x3 ath10k

[richard mayers <richard.mayers92@gmail.com>]

If you mean orthogonal between receiver and transmitter I already
tried and same results.

I also tried to lower the transmission power from 30dbm to 18, 6, 12..
but nothing changed.

Thanks,
Richard

2015-05-07 16:19 GMT+02:00 Ben Greear <greearb@candelatech.com>:
> You tried your antenna at different orientations?  Seems they work better
> when they are somewhat orthogonal to each other.
>
> Thanks,
> Ben
>
>
>
> On 05/07/2015 12:52 AM, richard mayers wrote:
>>
>> ---------- Forwarded message ----------
>> From: richard mayers <richard.mayers92@gmail.com>
>> Date: 2015-05-07 9:51 GMT+02:00
>> Subject: Re: Cannot achieve throughput higher than 460Mbps using CT
>> firmware and 3x3 ath10k
>> To: Michal Kazior <michal.kazior@tieto.com>
>>
>>
>> Hi,
>>
>> Yes, with only one spatial stream I can use MCS9 and I get 290Mbps
>> more or less, then with 2 spatial streams I can also use MCS 8, but as
>> I said with 3 streams  I only get a "good throughput" with  MC6.
>>
>> Richard
>>
>> 2015-05-07 7:47 GMT+02:00 Michal Kazior <michal.kazior@tieto.com>:
>>>
>>> On 6 May 2015 at 17:01, richard mayers <richard.mayers92@gmail.com>
>>> wrote:
>>>>
>>>> Hi all,
>>>>
>>>> The maximum throughput I get with the following set up is around
>>>> 460-470Mbits/s when using MCS 6, 80MHz channel and 3 spatial streams.
>>>> However, when I try MCS 7, the throughput drops to 200Mbits/s, and
>>>> when I use 8 or 9 it goes to 0. The signal level is -11dBm which I
>>>> guess is quite good.
>>>
>>>
>>> Hmm.. From my experience too strong signal can degrade performance
>>> with qca988x. You could try reducing it via `iw`. You could also try
>>> checking if using only 2 spatial streams also yields problems with
>>> MCS8 and MCS9.
>>>
>>> Antenna themselves might be the problem as well. Strong signal doesn't
>>> mean good signal quality. If your antenna connector is damaged or
>>> antenna is of poor quality you might end up not being able to use
>>> highest MCS rates.
>>>
>>>
>>> Michał
>>
>>
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>
> --
> Ben Greear <greearb@candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com

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