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Correlation receiving-based vehicle wireless distance measurement method

A technology of wireless distance measurement and related reception, which is applied in the field of wireless distance measurement and positioning, which can solve problems such as the inability to perform multi-vehicle serial collision warning, and achieve the effect of excellent distance measurement accuracy

Inactive Publication Date: 2015-12-09
CHINA UNIV OF PETROLEUM (EAST CHINA) +2
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a vehicle wireless distance measurement method based on correlation receiving technology, so as to overcome the problem that the existing vehicle distance measurement can only realize the distance measurement of adjacent vehicles and cannot perform multi-vehicle serial collision warning

Method used

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  • Correlation receiving-based vehicle wireless distance measurement method
  • Correlation receiving-based vehicle wireless distance measurement method
  • Correlation receiving-based vehicle wireless distance measurement method

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Embodiment Construction

[0025] Embodiments of the present invention will be described below in conjunction with the accompanying drawings. In the embodiment, it is assumed that the propagation delay of the signal is 191 sampling points, at this time, the subscript of the maximum value of group summation should theoretically be 191+9=200.

[0026] figure 1 It is an overall flow chart of the vehicle wireless ranging method based on correlation reception of the present invention, and the specific implementation of the ranging method is as follows:

[0027] A. Correlation calculation and normalization of the received signal: In the IEEE802.11p protocol, the conjugate value of the 160 samples of the short training sequence is used as the template signal to perform correlation calculation with the received signal, and the result P(d) Then divide by the signal energy R(d) to perform normalization processing, the processing result is M(d), the specific calculation method is:

[0028] P ...

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Abstract

The invention belongs to the technical field of wireless distance measurement and positioning, and particularly relates to a correlation receiving-based vehicle wireless distance measurement method. The method mainly comprises the four steps: A, an IEEE802.11p protocol receiving signal is subjected to correlation calculation and normalization processing; B, grouped summation is carried out on statistical results, and a time delay estimation sequence is obtained; C, signal propagation time delay is found out in the time delay estimation sequence; and D, the distance is calculated and obtained through the propagation time delay. Correlation summation is firstly applied to wireless positioning of the IEEE802.11p protocol, the positioning precision is high, stability is good, and the vehicle distance measurement precision can be improved in a multipath, non-line of sight and high-doppler frequency shift environment.

Description

technical field [0001] The invention belongs to the technical field of wireless ranging and positioning, and can be used for high-precision wireless positioning of vehicles using the IEEE802.11p protocol in the Internet of Vehicles, and specifically relates to a wireless ranging method for vehicles based on correlation reception. Background technique [0002] "Transportation safety and emergency protection" is one of the six key areas and priority themes of the transportation industry in the "National Medium and Long-Term Science and Technology Development Plan (2006-2020)", and it is also one of the "Twelfth Five-Year Plans for Transportation" It is one of the five major scientific and technological research and development projects and one of the six key areas for the promotion and application of scientific and technological achievements in the "Development Plan". Through the research and application of these ITS (Intelligent Transport System, Intelligent Transportation Sys...

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Application Information

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IPC IPC(8): G08G1/16
Inventor 崔学荣张浩李娟李忠伟吴春雷刘建航陈枭叶兴根
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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