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Re: [Discuss-gnuradio] Maximal signal bandwith for the usrp
From: |
Eng. Firas |
Subject: |
Re: [Discuss-gnuradio] Maximal signal bandwith for the usrp |
Date: |
Wed, 17 Oct 2007 23:46:38 -0700 (PDT) |
Hi,
USRP can transfer data at maximum of 32MB/s using its USB2. When the data
are 16 bit wide (16bit I and 16 bit Q) then maximum complex transfered data
will be 8 Msps which gives idealy maximum 8 MHz bandwidth. However, if we
use 8 bit data wide ( 8bit I, and 8bit Q), then maximum transfer will be 16
Msps complex data. This means, the USRP can process signals up to 16 MHz.
Firas
JALLON Pierre 201932 wrote:
>
> Dear all,
>
>
>
> According the USRP v4 description:
>
> http://www.ettus.com/downloads/usrp_v4.pdf
> <http://www.ettus.com/downloads/usrp_v4.pdf>
>
> the usrp is able to process signals up to 16MHz.
>
>
>
> As the USB port is limited to 60MB/s, and if the samples are coded on 32
> bits (16 for Q and 16 for I), the maximal bandwidth equals 15MHz.
>
>
>
> Which version is correct?
>
>
>
> Furthermore, considering that the first ADC works at 64Ms/s, the
> available rate for the USB equals:
>
> 32/2 (is it available ?)
>
> 32/3
>
> 32/4
>
> 32/5
>
> ...
>
> 32/256
>
>
>
> Am I right ?
>
>
>
> Thank you for your answers,
>
>
>
> Pierre Jallon
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
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