Generation of GPS and QZSS Spoofing Signals Using a Universal SDR Device

This research focuses on the development of open-source spoofing signal generation software for GPS and QZSS, tailored to work on universal software-defined radio (SDR) platforms. While GPS-SDR-SIM facilitates GPS signal implementation on software radios, it does not support QZSS signals. Therefore, in this research, we extended GPS-SDR-SIM to add compatibility with QZSS. Utilizing the developed software, we implemented GPS and QZSS signals with a universal SDR, that is USRP, and successfully received them with commercially available receivers. The results demonstrate that the developed software can be generated the GPS and QZSS signals at arbitrary times and locations.