DragonOS Noble Compiling FALCON & Decoding LTE PDCCH from Direct-to-Cell Satellites (LibreSDR)

In this video I’m remotely connecting to my solar-powered DragonOS SDR station for a full end-to-end workflow—everything from compilation to live satellite LTE decoding.

*The RustDesk ID shown in the video is from a Live Boot client and not that of the remote server, please make sure you never reveal an ID that you are actually using.*

I start by compiling a slightly more modern fork of FALCON (Fast Analysis of LTE Control Channels), originally released over 5 years ago. Once built, I load a custom .bin FPGA image onto a LibreSDR (a USRP-style SDR), configured via a uhd.conf file to auto-select the correct FPGA based on the SDR’s serial number.

Although, after filming this video and thinking about it, I had first changed the system bin file and when FALCON loaded, it pulled that file instead of what I expected. Just be aware the customized FPGA file per serial number may not apply in all situations.

The real fun begins when I use the freshly compiled FALCON to lock onto and decode the Physical Downlink Control Channel (PDCCH) from Starlink’s Direct-to-Cell satellites—beaming LTE signals from orbit in the 1900 MHz band. These satellites use 5 MHz FDD LTE channels and travel fast, making tracking and decoding a real test of timing and antenna placement.

If you're into SDRs, LTE reverse engineering, or satellite comms, this one’s for you.

Don’t forget to like, subscribe, and drop any questions below—especially if you’re trying similar setups or digging into FALCON or LibreSDR workflows.

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#DragonOS #SDR #FALCON #Starlink #DirectToCell #LTE #PDCCH #UHD #FPGA #RemoteSDR #Libresdr #GNUradio