Positioning Method of Ground-based Pseudo-Lite Receiver Based on Feedback Serial Interference Cancellation Algorithm

Abstract

The invention discloses a ground-based pseudolite receiver positioning method based on a feedback serial interference cancellation algorithm, and relates to the field of satellite positioning. The method of the present invention comprises: one, a plurality of pseudolite transmitters fixed in different areas transmit pseudolite signals with continuous time at the same frequency point; two, the receiver completes the estimation of the receiving power of the received pseudolite signals; three, the receiver Calculate the maximum ratio of the received power between the received pseudolite signals, and compare the ratio with the preset threshold of the receiver to judge the positioning solution using the regional serial interference cancellation algorithm or the direct ranging algorithm; 4. The receiver positioning solution calculates the received The coordinates of the aircraft antenna are used as the position of the Beidou / GPS navigation receiver. The present invention can realize high-precision positioning under the continuous ground-based pseudolite signal system; the present invention selectively adopts the method of serial interference cancellation for the far-near effect of the ground-based pseudolite, divides the service area of ​​the pseudolite, and reduces the calculation load of the receiver .

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 outdoor conditions such as the wild, mountain, and city, and to reach their destination quickly. [0003] Satellite navigation systems represented by Beidou and GPS have become more and more widely used, and have become indispensable functions such as smart phones and car navigators. However, satellite navigation signals cannot penetrate the walls of buildings due to the occlusion effect of buildings, or are blocked by terrain in areas such as mountains, so that the satellite navigation receiver loses its positioning function. Pseudolite system is a device that transmits similar satellite navigation signals to achieve inde...

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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