Method for realizing sub-meter-level positioning at smart phone and sub-meter-level positioning type smart phone

Abstract

The invention provides a method for realizing sub-meter-level positioning at a smart phone and a sub-meter-level positioning type smart phone. With an RTK carrier phase difference technology, a systemerror in a single-point positioning model is eliminated or weakened and position calculation is carried out by using a carrier phase observation value with the higher observation precision to replacea pseudo range, so that sub-meter-level positioning is realized at a smart phone. The method comprises: a mobile communication function module configured at a mobile phone is used for receiving ground station differential data broadcasted b a Beidou ground-based augmentation system and various types of location service networks; original satellite observation data reported by a satellite navigation observation quantity pushing module are obtained in real time; according to the obtained ground station differential data and the original satellite observation data, differential calculation is carried out to obtain a positioning result with the sub-meter-level positioning precision; and the sub-meter-level positioning result is provided for a third-party application program through an application program interface of a mobile phone location management module to realize 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 positioning on a smart phone and a smart phone with sub-meter positioning. Background technique [0002] With the popularization of smart phones and the continuous development of satellite navigation and positioning technology, the positioning function of Global Navigation Satellite Systems (GNSS) 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) calculations. 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 positioning accuracy of existing mobile phones is usually at the level of ten met...

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

Images