Question on FDD/full duplex and TDMA operation with USRP1

Hello

We are at Aalborg University currently working on building a USRP1
based testbed for OFDMA requiring FDD/full duplex as well as TDMA
(using timestamp functionality).
In an earlier post, dated 02 Mar 2009, it was mentioned that for USRP2
some modifications had to be made for the firmware as well as host
code to support full duplex.

We are interested in inquiring whether any changes have to be made to
the USRP1 as well, and if there there are any knowledge available to
be shared regarding the combined use of FDD and TDMA i.e full duplex
as well as timestamp functionality on the USRP1.

Best regards
Jesper Kristensen
Aalborg University, Denmark

On Mon, Apr 5, 2010 at 5:17 PM, [email protected] wrote:

USRP1 as well, and if there there are any knowledge available to be shared
regarding the combined use of FDD and TDMA i.e full duplex as well as
timestamp functionality on the USRP1.

Best regards
Jesper Kristensen
Aalborg University, Denmark

Hi Jesper,
The USRP1 should be just fine. You will run into issues of turn-around
time over the USB cable for doing the TDMA stuff and hitting the right
timestamps. The other issue is to either make sure the frequency bands
for the FDD are either in the bandwidth of the daughterboards if you
are receiving and transmitting with just one board, otherwise, use one
board to transmit and one to receive so that you don’t have to retune
the boards each time.

Tom

This forum is not affiliated to the Ruby language, Ruby on Rails framework, nor any Ruby applications discussed here.

| Privacy Policy | Terms of Service | Remote Ruby Jobs