Terrestrial Positioning System Using Mobile Transmitters and Synchronization Master

The patent introduces terrestrial transmitters as intermediary devices that broadcast positioning signals independently of GNSS satellites. These transmitters act as mediators that provide alternative positioning services, reducing dependency on GNSS and enhancing resilience against GNSS interference. The transmitters are synchronized using terrestrial communication infrastructure, creating a parallel positioning system that can operate when GNSS is unavailable or compromised.

The patent segments the positioning function by distributing it across multiple independent terrestrial transmitters rather than relying on a single GNSS satellite system. Each transmitter independently broadcasts positioning signals, and receivers combine information from multiple transmitters to achieve accurate positioning. This segmentation creates redundancy and reduces the impact of any single point of failure or interference source.

The patent implements a feedback mechanism where the synchronization master continuously monitors timing information from terrestrial transmitters and adjusts its own clock accordingly. The master receiver calculates timing offsets based on received signals and feeds this information back to the transmitters, enabling them to maintain accurate synchronization. This closed-loop feedback system compensates for drift and ensures precise time alignment across the distributed transmitter network.

The patent replaces traditional mechanical or wired synchronization methods with wireless electromagnetic communication for time distribution. Instead of using physical time signals or wired connections between transmitters and master clocks, the system uses radio frequency signals to transmit timing information. This substitution enables flexible, distributed synchronization while maintaining accuracy through sophisticated signal processing and feedback mechanisms.

The patent employs mobile transmitters that can dynamically change their locations while maintaining synchronization. The transmitters are designed to move freely without losing timing accuracy, allowing the positioning system to adapt to various coverage requirements. Mobile receivers track the dynamic positions of transmitters and calculate locations based on real-time signal information, enabling accurate positioning even when transmitters are in motion.

The patent performs preliminary synchronization of mobile transmitters before they begin broadcasting positioning signals. The synchronization master pre-aligns the clocks and timing parameters of mobile transmitters to ensure accuracy from the start. This preliminary action ensures that when transmitters move to different locations, they maintain precise timing relationships, enabling both coverage expansion and location tracking accuracy to coexist.