Open-source 5G NR Physical Downlink Control Channel (PDCCH) blind decoder: passively recovers the Downlink Control Information (DCI) and the RNTIs active in a cell, exposing scheduling/identity activity for traffic analysis. Written in C++ on srsRAN libraries; FDD, FR1 sub-6 GHz. Research-grade — the current release recommends working from a recorded I/Q file rather than live SDR, and live capture needs extra setup.