Algorithm for implementing GNSS and WIFI system seamless vertical handoff

Abstract

The invention provides an algorithm for implementing global navigation satellite system (GNSS) and WIFI system seamless vertical handoff based on a fuzzy neural network algorithm in order to realize a purpose of fusing two different positioning systems mutually to implement seamless handoff of indoor and outdoor positioning and navigation. The algorithm comprises the following steps: acquisition of main positioning information, handoff triggering based on received signals, and handoff algorithm judgment based on fuzzy neural network control. The algorithm for implementing the GNSS and WIFI system seamless vertical handoff has the beneficial effect of overcoming a defect that WIFI position precision is reduced outdoor and GNSS signals have a possible of occurring interruption indoor so as to provide wrong positioning information for a user; America GPS, Russia Glonass, EU Galileo and China Beidou satellite have a large development on satellite positioning and navigation application technology positioning aspects indoor, outdoor, underground, on the earth surface and the like; and meanwhile, the algorithm provided by the invention has wide applications in the fields of national military applications, international counter terrorism, tunnel detection and the like.

Description

technical field [0001] The invention belongs to the technical field of satellite positioning and navigation applications, and in particular relates to an algorithm for realizing seamless vertical switching between GNSS and WIFI systems based on a fuzzy neural network algorithm. Background technique [0002] At present, with the continuous advancement of science and technology, people's demand for location information is increasing. Whether it is for military purposes, aircraft navigation, ships, earthquake relief, international anti-terrorism or tunnel detection, etc. ,accurate information. Technological progress provides opportunities for localization-based services (LBS) for outdoor and indoor areas. LBS can timely and effectively push useful information resources in the surrounding environment through the acquisition of user location information. [0003] The full name of GNSS (Global Navigation Satellite System) is Global Navigation Satellite System, which is a multi-le...

AI Technical Summary

Problems solved by technology

[0006] For the outdoor global navigation satellite system (GNSS), its disadvantage is: due to its limitations, the satellite signal cannot be received well indoors and positioning cannot be performed, especially in the bustling business district of the city or the area full of tall buildings. Since the GNSS receiver cannot receive a sufficient number of GNSS positioning satellites in time, some signal critical areas will appear in the area to be tested, such as places where tall buildings stand, inside buildings, subway areas, etc.

When users are in such areas, they may be interfered by various signals, such as receiving electromagnetic waves or WLAN signals, etc., which will affect outdoor positioning.

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