[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] How do you measure the channel impulse response?
From: |
sirjanselot |
Subject: |
Re: [Discuss-gnuradio] How do you measure the channel impulse response? |
Date: |
Wed, 6 Oct 2010 05:46:38 -0700 (PDT) |
Thank you for your response.
I've tried gr sounder but from the looks of it, it is only accurate when you
use the LFRX/TX or the RFX boards.
I have a WBX transciever and when I tried it on my first shot measuring the
channel coefficients by directly connecting the output of my TXA to my RXA,
the length of the channel was 32760 coefficients!!!!
I haven't been able to figure out how to read the output.dat of the
gr-sounder yet but this is what is showing me on debugging mode.
It also keeps giving me this warning message: gr_buffer::allocate_buffer:
warning: tried to allocate
4 items of size 32760. Due to alignment requirements
512 were allocated. If this isn't OK, consider padding
your structure to a power-of-two bytes.
On this platform, our allocation granularity is 4096 bytes.
Any thoughts?
Thank you.
Martin Braun-4 wrote:
>
> On Tue, Oct 05, 2010 at 11:43:53AM -0700, sirjanselot wrote:
>> Hello,
>>
>> I'm trying to figure out how to measure the impulse response of a channel
>> its coefficients.
>
> Hello sirjanselot,
>
> the channel sounder which is part of GNU Radio works, but has no
> synchronisation or anything--so you have no direct means of averaging
> taps. Perhaps you can give it a bash, though.
>
> Cheers,
> MB
>
> --
> Karlsruhe Institute of Technology (KIT)
> Communications Engineering Lab (CEL)
>
> Dipl.-Ing. Martin Braun
> Research Associate
>
> Kaiserstraße 12
> Building 05.01
> 76131 Karlsruhe
>
> Phone: +49 721 608-3790
> Fax: +49 721 608-6071
> www.cel.kit.edu
>
> KIT -- University of the State of Baden-Württemberg and
> National Laboratory of the Helmholtz Association
>
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
--
View this message in context:
http://old.nabble.com/How-do-you-measure-the-channel-impulse-response--tp29890077p29896331.html
Sent from the GnuRadio mailing list archive at Nabble.com.