We aim at making most of our projects open-source. Please check out my GitHub page:
USRP-N210 mixed FPGA/software implementation of an automated spectrum scanner:
https://github.com/fquitin/energy_detection_system
Detection of a RF transmitter with a Wi-UAV (using the DJI Matrice-100 and a USRP-B205mini):
https://github.com/fquitin/Wi_UAV_tx_localization
Distributed transmit beamforming using USRP-N210:
Download the code here. REMARK: this code was written using a (very) outdated version of GNU Radio. You can use this to get the general idea of how the code works, but you're probably better of re-writing it in a more recent version of GNU Radio than trying to make it work on an older version.