Carrier phase measurement method achieves higher accuracy than legacy code-based distance measurement methods primarily due to its precision in determining the exact number of wavelengths between a transmitter and receiver. This method can detect fractional changes in the signal phase, allowing for sub-centimeter level accuracy in positioning. In contrast, code-based methods generally provide meter-level accuracy due to their reliance on timing measurements, which are more susceptible to timing errors. Carrier phase measurement's ability to discern such fine details makes it exceptionally suited for applications requiring high precision, such as surveying, geolocation, and autonomous vehicle navigation.

C-V2X based carrier phase positioning offers significant advantages over traditional lidar or radar-only vehicle sensing systems, particularly in its ability to operate effectively in challenging conditions and complex environments. Unlike lidar or radar, which can struggle in bad weather or fail to detect distant objects, C-V2X technology can accurately identify the position of objects far away, regardless of weather conditions. This system not only detects other vehicles but also communicates with them, enabling cooperative planning for safer traffic movement. An additional benefit is its capacity to recognize pedestrians and cyclists using smartphones, enhancing safety for more vulnerable road users. With a detection range that far exceeds other sensors, C-V2X based carrier phase positioning can monitor hundreds of vehicles and pedestrians in a car's vicinity, offering a comprehensive view of the surrounding area to ensure optimal navigation and safety.