At TKN we deployed a small testbed consisting of two USRP-SDRs (X310, 2x2 MIMO, Ettus Research) devices which are used for LTE-based research. We use the open-source LTE protocol stack srsLTE which can be easily modified and extended.

Link to pdf:

Software defined radio (SDR) hardware for LTE-based Research

Links:

Ettus X310 SDR:

-        https://www.ettus.com/product/details/X310-KIT

srsLTE stack:

-        https://github.com/srsLTE/srsLTE