Long Range (LoRa) has become recently a frontrunner in the Low-Power Wide-Area Networks (LPWAN) solutions applied to low-energy and low-cost Internet of Things (IoT) transceivers. LoRa security mainly relies on the application layer, where few security is present at the physical layer. Combining security of both layers would increase the overall LoRa security. We proposed in that sense a LoRa self-jamming scheme that enables secure and covert communications by adding jamming symbols when transmitting. The scheme has been validated in simulations. This article continues the work by validating the scheme on real-world Software Defined Radio (SDR) equipment. We develop in that sense a dedicated synchronization frontend, crucial part of the receiver to enable proper demodulation. Each step of the front-end is detailed and results from SDR transmissions are provided to assess demodulation ability. Results show proper demodulation of the transmitted symbols and very good adequacy between expected and actual front-end behavior on SDR. This paves the way for real-world application of the LoRa self-jamming scheme.