A novel collaborative navigation architecture based on decentralized and distributed Ad-hoc networks

To provide services for other applications, promoting the availability of Global Positioning System (GPS)-is very important. While in the urban environments or with the high-power malicious interference, GPS signal is shaded by buildings or overwhelmed by interference. Hence the receivers may not acquire correct pseudo random noise (PRN) codes. Assisted GPS (A-GPS) technologies can solve the shaded problem, and antenna array with adaptive digital beam forming (ADBF) or spacetime adaptive processing (STAP) has been proved the effective methodology for interference suppressing. However, A-GPS may be not available, and the radio-frequency (RF) front end is too costly and cumbersome for a single customer. This paper investigates the collaborative navigation technology, utilizing GPS group users with dynamic Ad-hoc network and internal range measurements. Decentralized and distributed network architectures are presented for shading and interference presences, based on which user assistance and ambiguity removing for ADBF are proposed. Simulation results verify the performance improvement of the collaborative navigation based on dynamic Ad-hoc networking for different presences.