Indoor positioning method using single station and a plurality of channels

Abstract

The invention belongs to a method for positioning an indoor object with a wireless propagation signal source by using a single station and a plurality of channels. The method comprises the following steps of: setting positioning grids and monitor candidate positions; establishing an initial database containing a basic database and a comprehensive parameter database; determining an optimal channelcombination of a monitor at each candidate position; determining a final set position of the monitor, a positioning channel combination and an actual positioning database; and determining the position of the managed object to be positioned. In the method, first the positioning grids and the monitor candidate positions are set in a positioning region, then RSS data are acquired on the plurality ofchannels and at different positions with a single monitor and finally the position of the monitor, the optimal channel combination and the positioning database are determined after an optimization process; and meanwhile, the signal source the same as the positioning channel combination is set on the managed object. Therefore, the method has the characteristics of positioning the object to be managed through the plurality of channels by adopting one detector, effectively reducing the positioning cost, and the like.

Description

technical field [0001] The invention belongs to a method for locating an indoor (with) wireless propagation signal source (target), in particular to a method for indoor locating a target with the same channel signal source by using single-station multi-channel signal strength. The method of the invention exchanges the number of channels for the number of monitors, avoids the time synchronization requirement between monitors and between monitors and targets to be positioned, and is a low-cost positioning method. Background technique [0002] With the emergence of various new location-aware technologies, indoor positioning technology shows a very broad application prospect in business and public safety. For example, the indoor positioning system can be used to locate people or objects in a building in real time, prevent equipment from being lost, restrict access to areas, and so on. The Global Positioning System (GPS) is a model of successful application of outdoor positionin...

AI Technical Summary

Problems solved by technology

Although this kind of positioning technology based on database matching overcomes the traditional parametric indoor wireless positioning technology affected by factors such as non-line-of-sight transmission effects, multipath propagation effects, and complex signal attenuation laws, it improves the positioning accuracy to a certain extent; This type of method requires the use of multiple monitors (at least two) to participate in the positioning. Too few monitors will cause the RSS vector to appear ambiguous due to its low dimension, and there is no significant difference in the RSS vector at different positions.

Therefore, this technology is not suitable for using a single monitor to locate the target, and in the case of large-scale positioning, a large number of monitors need to be arranged, which makes it difficult to further reduce the positioning cost and limits the defects of large-scale universal application.

[0004] At present, the target positioning technology using a single monitor generally still uses the traditional parametric positioning method (for example, the single-station positioning technology that simultaneously measures TOA and AOA); Influenced by factors such as complex rules, high time synchronization accuracy requirements, difficult maintenance of the array direction finding system, and high positioning costs

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