Wireless indoor location method and system thereof

Abstract

The invention discloses a wireless indoor location method and a system thereof. The method comprises steps for introducing outdoor terrestrial digital television signals and steps for realizing indoor location, wherein the steps for realizing indoor location are as follows: b1, an indoor receiver sends location request signals by broadcast; b2, a digital television receiver activates a location processing module therein to go into a location state after receiving the signals; b3, the digital television receiver calculates the space position of a receiving antenna; b4, the digital television receiver transmits the position information of the receiving antenna and the time information of the system to the receiving antenna in the form of UWB signals by wire transmission; b5, the receiving antenna sends the UWB signals to a receiver to be positioned; and b6, the receiver to be positioned processes the UWB signals according to different conditions to realize the location. The technical scheme of the invention can realize the high-accuracy omni-directional positioning.

Description

technical field [0001] The invention relates to the technical field of wireless positioning, in particular to a method and system for realizing small-scale and high-precision indoor wireless positioning. Background technique [0002] For the most widely used global positioning (Global Position System, GPS) system, due to the existence of multipath effects, satellite orbit errors, ionospheric delay effects and other phenomena, the signal attenuation is serious, and the signal reaching the ground is weak. The probability of achieving positioning is 60%, and the probability of indoor positioning is 0. With the development of short-distance wireless communication technology, small-scale positioning systems have gradually emerged, such as infrared, Bluetooth, WiFi, etc., for indoor positioning. Although the positioning accuracy is higher than that of GPS, it is easily interfered by noise signals and positioning errors There is instability, and the equipment is expensive, the ene...

AI Technical Summary

Problems solved by technology

For outdoor receivers, the national terrestrial digital TV standard can theoretically achieve a ranging error of 0.4m to 4m, while the error of the GPS system is 5m to 20m, which relatively improves the positioning accuracy and solves the problem of slow GPS cold start. However, the DTV-T signal undergoes long-distance transmission, which suffers from large interference and serious attenuation.

For indoor receivers, when the receiver is located in an area with strong DTV-T signal coverage, the signal strength reaching the room is high, and indoor positioning can be realized. The signal multipath effect in the upper room is strong, and it is difficult for the receiver to receive the DTV-T signal, and the signal interference is large, and the positioning error is above the meter level, and it is even impossible to achieve positioning

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