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[Discuss-gnuradio] Re: question on GNU Radio
From: |
Eric Blossom |
Subject: |
[Discuss-gnuradio] Re: question on GNU Radio |
Date: |
Mon, 19 Feb 2007 14:34:17 -0800 |
User-agent: |
Mutt/1.5.9i |
On Mon, Feb 19, 2007 at 12:49:04PM -0800, Candy Yiu wrote:
> Hi Eric,
>
> I never meet you but just have some question which I guess no one can
> answer.
> We are trying to build a smart antenna using the USRP board. I watched
> the video which you guy gave a talk about it and mention it can support
> up to 4 tx and 4 rx (there are 4 A/D as well). I was wondering if you
> guy have a daughter board which has two tx and rx or any tip to connect
> two daughter board?
>
> thanks a lot,
> Candy
>
> Portland State University
To use 4 in's and 4 out's with the USRP you'll need to use two
"Basic Rx" and two "Basic Tx" daughterboards.
There are two main constraints:
FPGA space
USB bandwidth (32MB/s total)
We provide standard FPGA configurations with:
(a) 2 receive paths (with half-band filters) and 2 transmit paths.
or
(b) 4 receive paths (no half-band filters) and 0 transmit paths.
Eric
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