Comparison Between Experimental Low-Cost and High Grade out of the Box Receivers

This paper presents a comparative performance analysis of an experimental low-cost Raspberry Pi-based software-defined radio (SDR) ADS-B receiver (approx. $160 total cost) and a high-grade commercial uAvionix PingRx Pro ADS-B unit integrated with a PixHawk Cube Orange flight controller (approx. $742). In a side-by-side field deployment, both systems simultaneously monitored ADS-B broadcasts from commercial and general aviation aircraft. Key performance metrics such as total ADS-B messages received, unique aircraft counts, overlap in aircraft detected by both receivers, and maximum detection range were recorded and analyzed. The SDR-based receiver captured a higher overall volume of ADS-B messages (about 1.32 million vs 0.97 million for PingRx Pro) and tracked more aircraft in total, demonstrating a high data yield for its cost. However, the PingRx Pro excelled in long-range, high-altitude detection. It consistently picked up aircraft flying above 10,000 ft at distances beyond the SDR’s reach and demonstrated superior resilience to radio frequency (RF) noise and interference. Approximately 77% of the 4,670 total unique aircraft were detected by both receivers, reflecting substantial coverage overlap, while PingRx’s extended range accounted for most of the uniquely detected flights. This study illustrates that the SDR solution, despite its limitations in range and noise rejection, offers an affordability advantage that enables scalable deployment of multiple units.