Re: [Discuss-gnuradio] How do you measure the channel impulse response?

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
>
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