DME/DME navigation using a single low-cost SDR and sequential operation

• The new sequential DME/DME concept was introduced to develop a DME/DME positioning system in the ZeptoSDR platform • The position accuracy is dependent on the stations geometry and the distance measurement errors, which is highly accurate • To get the best performance from the system, station geometry should be controlled • Integration of DME/DME navigation with other navigation systems, such as GNSS, is also an interesting future research and would help to reduce the position bias • The interrogator performs the complete search/tracking procedure before switching to the next ground station channel in a positioning rate of about 0.2 Hz • Accelerate the process by decreasing the interrogator dwell time at each frequency to the minimum allowed (about 20 ms) — Improved accuracy • Stations selection for optimal geometry based on availability can be investigated in the future • Implementation of more advanced position smoothing and distance computation methods to increase accuracy