Bus-mounted receiver based on WIFI auxiliary positioning

Abstract

The invention relates to the field of automatic station reporting systems of buses, and discloses a bus-mounted receiver based on WIFI auxiliary positioning. The bus-mounted receiver comprises a WIFI communication module, a wireless AP and a WIFIauxiliary positioning module, wherein the WIFI communication module is used for acquiring information of a base station; the wireless AP is a wireless access point; and the WIFI auxiliary positioning module of the bus-mounted receiver provides an auxiliary method for assisting in bus positioning in a manner of acquiring base station information through WIFI signals and base station communication when GPS signals are shielded or signals are weak and a bus position cannot be normally positioned. The positioning method of the auxiliary positioning module is a propagation model method based on signal intensity and a trilateral positioning algorithm. The propagation model method based on the signal intensity refers to estimating a distance between a terminal and the AP at a known position according to a mathematical relationship by using a certain channel fading model assumed in a current environment. According to the invention, WIFI auxiliary positioning is adopted, cost is low, implementation is convenient, and maintenance is feasible.

Description

Technical field [0001] The present invention relates to the field of automatic bus station system, which is specifically a WiFi-aided positioning bus machine. Background technique [0002] The position of the vehicle under the viaduct or more places in the high-rise building has always been unsolved. Due to the severe attenuation and multipath effects of the signal, universal GPS positioning does not work efficiently in these places. Positioning accuracy is also a problem, people want to get precise position, which requires other auxiliary means to achieve positioning. [0003] Since the GPS signal is very weak, it is easy to generate the drift point positioning inaccurate, often there is a problem that the driving trajectory of the in-vehicle machine, unable to report and abnormal speed, etc., which have a great impact on urban bus scheduling. So you need to find an auxiliary method to ensure the accuracy of the bus station system. Inventive content [0004] It is an object of ...

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