Ground-based pseudolite receiver positioning method based on feedback successive interference cancellation

Abstract

The invention discloses a ground-based pseudolite receiver positioning method based on feedback successive interference cancellation and relates to the field of satellite positioning. The method includes: 1, allowing multiple pseudolite transmitters fixed in different areas to transmit same-frequency continuous-time pseudolite signals; 2, allowing a receiver to estimate received powers of the received pseudolite signals; 3, allowing the receiver to compute a maximum ratio of the received powers of the received pseudolite signals, comparing the maximum ratio to a preset receiver threshold to judge whether to use a regional successive interference cancellation algorithm or a direct ranging algorithm to perform positioning calculation; 4, allowing the receiver to compute antenna coordinates of the receiver by positioning calculation, used as a position of a Beidou / GPS (global positioning system) navigation receiver. The method has the advantages that high-precision positioning can be achieved in the continuous ground-based pseudolite signal system, successive interference cancellation is selectively adopted on the ground-based pseudolite near-far effect, a pseudolite service area is zoned, and computing load of the receiver is reduced.

Description

technical field [0001] The invention relates to the field of pseudolite positioning, in particular to a high-precision positioning method of a ground-based pseudolite network under a continuous signal system. Background technique [0002] At present, the demand for navigation and positioning is becoming more and more urgent. People hope to know where they are in the wild, mountains, cities and other outdoor conditions, and to reach their destination quickly. [0003] Satellite navigation systems represented by Beidou and GPS are more and more widely used, and have become an indispensable function for smartphones and car navigators. However, due to the occlusion effect of buildings, satellite navigation signals cannot penetrate the walls of buildings, or are blocked by terrain in areas such as mountains, so that the satellite navigation receiver loses its positioning function. The pseudolite system is a device that transmits similar satellite navigation signals to achieve in...

AI Technical Summary

Problems solved by technology

However, due to the occlusion effect of buildings, satellite navigation signals cannot penetrate the walls of buildings, or are blocked by terrain in areas such as mountains, so that the satellite navigation receiver loses its positioning function

The pseudolite system is a device that transmits similar satellite navigation signals to achieve independent positioning in a sheltered environment. However, the pseudolite has a strong near-far effect, which has a great impact on ranging, and cannot achieve high precision in some areas. position

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