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Re: [Discuss-gnuradio] USRP B200 host BW with USB 3.0/2.0
From: |
Martin Braun |
Subject: |
Re: [Discuss-gnuradio] USRP B200 host BW with USB 3.0/2.0 |
Date: |
Thu, 29 Jan 2015 14:07:38 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 |
On 01/29/2015 01:48 PM, Jorge Gallo wrote:
> I understand the given values of host bandwidth for each protocol:
>
> USB 2.0 8 (MS/s @ 16-bit I/Q)
If you go down to 8-bit I&Q, you will get twice that amount, if that's
any help.
> USB 3.0 61.44 (MS/s @ 16-bit I/Q)
>
>
>
> However I would like to process 40MHz of analogue BW in GNURadio over
> USB 2.0
>
>
> I fully understand a continuous reception is not possible to manage
> since it would require 40 IQ MS/s and I am limited to 8MS/s.
>
>
>
> However, is it possible to take snapshots of 40MHz over the time so that
> I am able to receive bits of 40MHz with USB 2.0 which are not continuous
> in time?
>
> Are there buffers in the FPGA that manage this kind of operation?
None big enough for anything useful.
It seems like attaching a USB3.0 connector would be simpler than running
5 USRPs? Not that I would complain about the sales :)
M