Device Setting for MIMO on usrp1

Hi guys

I am going through the mimo ofdm code written by Tom R… In the
benchmark_ofdm_tx_mimo.py
code, a usrp sink is created.The code takes into account the number of
antennas also and
accordingly uses the ofdm_alamouti_tx_cc. Can you please let me know if
the mimo scheme
developed by tom should have 2 daughter boards on a single usrp1 device
or
multiple
antennas on a single daughter board?

thanks in advance

Thanks
Regards

Bharadwaj D