A wireless positioning method based on the information of the mobile device itself

Abstract

The invention discloses a mobile equipment's own information based wireless positioning method which takes already positioned mobile equipment as anchor points or a part of the anchor points for ranging and positioning to-be-positioned mobile equipment. In other words, the method uses already positioned mobile equipment as mobile anchor points to position other mobile equipment. As all positioned users can serve anchor points, the number of anchor points in an environment increases so that the problem of failing to position due to a limited number of anchor points can be addressed and consequently, the positioning rate of mobile equipment improves substantially. According to the invention, Kalman filtering is introduced and expanded in the method, which reduces the impacts of a multi-path effect and range finding errors, therefore, further increasing the positioning accuracy. The method of the invention can be performed with just general positioning nodes, requiring not so much on positioning hardware. In addition, the algorithmic calculating complexity remains low. Compared to a traditional positioning scheme, the method overcomes the deficiencies of requirements of stringent hardware for positioning nodes, complex algorithmic calculating, costly positioning and high calculating complexity.

Description

technical field [0001] The present invention relates to the technical field of wireless positioning, and more specifically, relates to a wireless positioning method based on information of a mobile device itself. Background technique [0002] In recent years, wireless positioning technology has been widely used in fields such as emergency rescue, mobile e-commerce, military, industry, and wireless sensors. In these domains, the positioning of mobile users is an important application. For example, safety accidents in the construction industry in Hong Kong account for one-fifth of the safety accidents every year. If the safety management system can continuously monitor the position of these moving workers and send out warning messages when they approach dangerous areas, it will greatly reduce the occurrence of safety accidents. This puts higher requirements on the traditional positioning technology. On the one hand, mobile users can only use wireless positioning. However, th...

AI Technical Summary

Problems solved by technology

[0007] One is that it is difficult to locate the user when there are few fixed anchor points in the environment. For example, obstacles block the signals of the anchor points, and the mobile device cannot obtain the signals of more than three anchor points at the same time, so it cannot be positioned by traditional positioning methods;

[0008] The second is that in the indoor environment, there are influences such as multipath effect and wireless signal interference, which make the positioning accuracy low

Therefore, the traditional method of positioning mobile devices has many disadvantages

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