Open-source SDR 4G suite: srsUE (cell search, MIB/SIB receiver, MAC-LTE/RRC PCAP output), srsENB (a full eNodeB) and srsEPC. The reference open LTE stack on HackRF/bladeRF/USRP — passive receiver for Capture, and the basis for fake-eNB/IMSI-catcher research when transmitting under authorisation.