Method for Realizing Sub-meter Positioning on Smartphones and Sub-meter Positioning Smartphones

Abstract

A method for realizing sub-meter positioning on a smart phone and a sub-meter positioning smart phone proposed by the present invention use RTK carrier phase difference technology to eliminate or weaken the systematic error in the single point positioning model, and use a higher observation accuracy The carrier phase observation value replaces the pseudo-range for position calculation, and the sub-meter level positioning is realized on the smartphone. The method of the present invention includes: receiving the ground station differential data broadcast by the Beidou ground-based augmentation system and various location service networks through the mobile communication function module carried by the mobile phone; obtaining the original satellite observation data reported by the satellite navigation observation push module in real time; Perform differential analysis based on the obtained ground station differential data and satellite original observation data to obtain sub-meter-level positioning accuracy positioning results; provide sub-meter-level positioning results to third-party applications through the application program interface of the mobile phone location management module, Realize the seamless connection between the high-precision position output and the standard interface of the mobile phone system.

Description

technical field [0001] The invention belongs to the technical field of smart phones, and in particular relates to a method for realizing sub-meter level positioning on a smart phone and a sub-meter positioning smart phone. Background technique [0002] With the popularization of smart phones and the continuous development of satellite navigation and positioning technology, satellite navigation (Global Navigation Satellite Systems, GNSS) positioning function has become a standard configuration on smart phones. Most of the existing mobile phone chips have integrated GNSS baseband signal processors, which can capture and track satellite signals in real time, and perform Single Point Positioning (SPP, Single Point Positioning) solutions. However, since the single-point positioning model contains more systematic errors, the antenna performance of the mobile phone affects the pseudo-range accuracy. Therefore, the existing mobile phone positioning accuracy is usually ten meters. ...

AI Technical Summary

Problems solved by technology

The accuracy of the receiver clock error solution will affect the accuracy of position calculation

[0006] (2) Errors related to satellites

[0008] (3) Errors related to the propagation path

However, SBAS is a wide-area correction information, and its correction accuracy is affected by the number and distribution of ground stations, so it is difficult to ensure sub-meter correction accuracy

And because the built-in GNSS antenna of the mobile phone is generally very small in size, and is usually integrated with the antenna used in wireless communication technologies such as WIFI and Bluetooth, the performance of the antenna is poor: the gain is not high and the directivity is poor, making the code of the satellite signal Tracking accuracy (pseudorange) drops

Therefore, even with SBAS correction information, it is still difficult to achieve sub-mi positioning on mobile phones

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