Ultra-wideband wireless positioning method with high precision

Abstract

The invention relates to an ultra-wideband (UWB) wireless positioning method with high precision. The method comprises the following steps of: A. initializing a system; B. transmitting a UWB pulse signal; C. receiving and calculating the propagation delay tau of the pulse signal; D. sending the calculating result of the propagation delay tau; E. receiving the propagation delay tau; F. calculating the distance measuring result of each base station; and G. finally, calculating the positioning coordinate of a terminal to be positioned with a TOA (Time of Arrival) or TDOA (Time Difference of Arrival) positioning algorithm. The method is characterized in that after step E, backward filtration is carried out on the measuring value tau of the propagation delay by the maximum moving speed v of the terminal to be positioned; and the maximum probability measuring value of the propagation delay is used as the finally used propagation delay. The positioning method in the invention has the advantages of high reliability, accurate and quick positioning, and high anti-jamming capability, has no need of additional hardware equipment, and can be widely applied to position various wireless equipment.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to ultra-wideband (UWB) wireless communication technology, in particular to a high-precision wireless positioning method using ultra-wideband. Background technique [0002] Ultra-wideband wireless communication technology is a wireless communication technology that uses discontinuous pulses less than nanoseconds in length to communicate without using a carrier. Since UWB uses ultra-short pulses less than nanoseconds for communication, its signal power is spread in an ultra-wide frequency range from 0 to tens of GHz. This unique communication mechanism makes it unique compared with current frequency-domain communication technologies. Insensitivity to channel fading, low transmission power, coexistence with other wireless systems, strong multipath resolution, strong anti-interference ability, low system complexity, strong penetration ability, etc., so it has attracted widespread at...

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Problems solved by technology

[0019] The purpose of the present invention is to provide a high-precision ultra-wideband wireless positioning method to overcome the shortcomings of low measurement accuracy in the prior art

[0020] On the basis of the prior art, the present invention adds "backward filtering of the measurement value of the propagation delay with the maximum moving speed v of the terminal to be positioned", thereby solving the problem in the prior art that it is difficult to process data with large errors ; After the "backward filtering", "taking the maximum probability measurement value of the propagation delay as the final propagation delay" is added to solve the problem that the exact value cannot be obtained in a complex wireless environment, and finally obtain High-precision positioning coordinates of each terminal to be positioned

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