Carrier Phase Difference Positioning for Centimeter-Level Terminal Accuracy

The patent segments the carrier phase measurement process into multiple time-point measurements. Instead of requiring the terminal device to directly measure both whole cycles and decimal parts simultaneously, the system performs separate measurements at different time points and processes the differences to derive positioning information, thereby resolving the measurement capability limitation.

The patent introduces carrier phase difference as an intermediary measurement quantity. Rather than directly measuring the absolute carrier phase (which requires measuring both whole cycles and decimal parts), the system measures the difference in carrier phases at different time points, which can be obtained through standard receiver measurements and then used to calculate positioning accuracy.

The patent applies preliminary action by pre-configuring multiple positioning signals with specific signal configurations before measurement. The network device configures the positioning signals in advance, defining their properties and measurement parameters, which simplifies the terminal device's measurement process and reduces real-time processing complexity while enabling centimeter-level accuracy through carrier phase difference.

The patent employs periodic action by performing carrier phase measurements at multiple discrete time points. The system configures positioning signals to be measured at different time instances, and by processing the periodic sequence of measurements and their differences, the system achieves high positioning accuracy while distributing the measurement complexity across multiple simpler time-point operations.