High precision wireless positioning method and system based on multipath dispersion information

Abstract

The invention relates to a high-precision radio positioning method and a system thereof based on multidiameter scattering information, which can be applied to various positioning environments, particularly the rich multidiameter conditions with an intense scattering environment and many barriers near a mobile terminal that needs to be positioned, such as urban areas, hilly areas and the like. The method is a high-precision practical positioning technology and comprises the following steps: firstly, a reasonable multidiameter scattering radio positioning model which is transmitted by non-line-of-sight electric waves is established according to the actual communication environment; then the scattering information is estimated by the positioning data of the multipacket and multidiameter scattering information detected by a plurality of sensors; then a group of analog sensors are reconfigured by the scattering information; and finally, at the time of final positioning, a new judgment rule and a new algorithm obtained by revision and used for the multidiameter scattering information are put forward, so as to realize precise target positioning. The high-precision radio positioning method and the system thereof can effectively inhibit non-line-of-sight communication errors, and have the advantages of low cost, low energy consumption and very high positioning precision.

Description

technical field [0001] The invention relates to a wireless positioning method and system in wireless communication, and in particular provides a high-precision wireless positioning method and system based on multipath scattering information. Background technique [0002] With the rapid increase of data services and multimedia services, people's demand for new services based on wireless positioning technology is increasing, especially in complex scattering environments, such as airport halls, exhibition halls, warehouses, supermarkets, libraries, underground parking lots In environments such as mines and mines, it is often necessary to determine the location information of mobile terminals or their holders, facilities and objects indoors, which promotes the in-depth research on wireless positioning technology. At the same time, providing users with accurate positioning information has become one of the standard services of the new generation of wireless communication systems....

AI Technical Summary

Problems solved by technology

However, limited by conditions such as positioning time, positioning accuracy, and complex indoor environments, the relatively complete positioning technology cannot be well utilized at present.

Many positioning technology solutions, such as A-GPS positioning technology, Bluetooth technology, infrared technology and other wireless positioning technologies need to add new hardware to the mobile terminal, which will have an adverse impact on the size and cost of the mobile station

At the same time, due to the complex radio wave propagation environment such as urban areas, due to many obstacles and harsh radio wave propagation environment, it is difficult for the signal to reach the mobile station directly from the base station. Generally, multipath signals are generated after refraction or reflection, which is not a line-of-sight After arriving at the receiving device, there will be a large error in the TOA measurement of the signal, so the positioning accuracy will be greatly affected

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