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Ultra wide band wireless locating method based on skewness and maximum slope

A wireless positioning and positioning method technology, applied in wireless communication, electrical components, etc., can solve the problem of low ultra-broadband wireless positioning accuracy, and achieve the effect of improving positioning stability, positioning accuracy, and accuracy

Inactive Publication Date: 2013-01-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0009] The purpose of the present invention is to provide a high-precision signal fingerprint ultra-wideband wireless positioning method based on skewness and maximum slope, so as to overcome the problem that the existing signal fingerprint ultra-wideband wireless positioning accuracy is not high

Method used

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  • Ultra wide band wireless locating method based on skewness and maximum slope
  • Ultra wide band wireless locating method based on skewness and maximum slope
  • Ultra wide band wireless locating method based on skewness and maximum slope

Examples

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Embodiment 1

[0076] Under the CM1 and CM2 channels of IEEE802.15.4a for T b =lns Carried out 1000 simulations of energy-based TOA estimation with different algorithms (joint estimation based on skewness and maximum slope, fixed threshold, kurtosis, maximum energy selection), and finally obtained 1000 channel response TOA in each case Estimated mean absolute error MAE. The UWB pulse used is a Gaussian second-order derivative pulse of 1ns, and other parameters are set to: F c =8GHz, T f =200ns, T b =4ns,N s =1, TOA is randomly distributed in (O, T f )between.

[0077] With the joint parameter J as the abscissa and the normalized threshold Threshold as the ordinate, exponential curve fitting is performed, and the fitting result is:

[0078] F ( J ) = - 0.0053 J 2 ...

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Abstract

The invention belongs to the technical field of wireless location, and particularly relates to an ultra wide band wireless locating method based on skewness and maximum slope. The method mainly comprises four steps as follows: step A, collecting an integration energy block and calculating the skewness and the maximum slope, so as to obtain a joint parameter, and establishing a fingerprint database of three parameters, namely the joint parameter, a TOA (Time Of Arrival) estimated error, and a normalized threshold; step B, carrying out curve fitting on the fingerprint database, establishing a correspondence F between the joint parameter corresponding to the minimum TOA estimated error and the normalized threshold; step C, obtaining a joint parameter according to the skewness and the maximum slope of a collected real-time signal, calculating with use of the correspondence F so as to obtain the optimal normalization threshold, and obtaining the TOA estimated value according to the threshold; and step D, carrying out wireless location based on ultra wide band (UWB) by using a traditional UWB location algorithm according to the TOA estimated value. According to the ultra wide band wireless locating method based on skewness and maximum slope disclosed by the invention, the skewness and the maximum slope are combined for the first time; the method has the advantages of high location precision and good stability, and can be applied to high-precision wireless location of applications such as internet of things and wireless sensor networks.

Description

technical field [0001] The invention belongs to the technical field of wireless positioning, and can be used for high-precision wireless positioning in applications such as the Internet of Things and wireless sensor networks, and specifically relates to an ultra-wideband wireless positioning method based on skewness and maximum slope. 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 ab...

Claims

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Application Information

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IPC IPC(8): H04W64/00
Inventor 崔学荣张浩李娟张国平吴春雷王景景吕婷婷王辛杰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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