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Distance measuring method of wireless ad hoc network and distance measuring system for realizing method

A wireless ad hoc network and ranging method technology, which is applied to radio wave measurement systems, wireless communications, measurement devices, etc., can solve the problems of low ranging accuracy, and achieve the effects of high measurement accuracy, improved accuracy, and accurate distance measurement.

Inactive Publication Date: 2009-10-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that the distance measurement method of the existing wireless ad hoc network only measures the distance according to the peak position, resulting in low ranging accuracy, thereby proposing a wireless ad hoc network distance measurement method based on fractional Fourier transform domain correlation and its use The distance measuring device of the method

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  • Distance measuring method of wireless ad hoc network and distance measuring system for realizing method
  • Distance measuring method of wireless ad hoc network and distance measuring system for realizing method
  • Distance measuring method of wireless ad hoc network and distance measuring system for realizing method

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specific Embodiment approach 1

[0025] Specific embodiment one: a kind of wireless ad hoc network ranging method, it is completed by the following steps:

[0026] Step 1: The chip signal generated by the transmitting node modulates the ranging sequence to generate a ranging signal;

[0027] Step 2: The transmitting node controls and transmits the ranging signal;

[0028] Step 3: The target node receives the ranging signal described in Step 2, and adds a fixed time delay to the ranging signal before transmitting it;

[0029] Step 4: The transmitting node receives the signal returned by the target node, and filters the signal to obtain the filtered signal;

[0030] Step five: performing discrete sampling on the filtered signal obtained in step four to obtain discrete sampling values;

[0031] Step 6: After the discrete sampling value obtained in step 5 is transformed by p-order fractional Fourier transform, r is obtained p (u), the r p (u) and the reference signal m obtained by p-order fractional Fourier t...

specific Embodiment approach 2

[0068] Specific implementation mode two: combination figure 1 with figure 2 This specific implementation is described. This specific implementation implements the ranging system of the wireless ad hoc network ranging method described in the first specific embodiment. It is composed of a plurality of ranging nodes, and each ranging node has the same structure. The distance node includes chip signal generator 1, transmit waveform shaper 2, clock controller 3, filter 4, sampler 5, peak detector 7, transmit antenna 10 and receive antenna 11; each node also includes fractional Domain correlation module 6 and peak position and size joint estimation distance module 8, described fractional domain correlation module 6 is produced by first p-order fractional Fourier transformer 6-1, -p order fractional Fourier transformer 6-2, local template signal device 6-3, the second p-order fractional Fourier transformer 6-4 and correlator 6-5; the first cutting signal output end of the cutting s...

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Abstract

The invention discloses a distance measuring method of a wireless ad hoc network and a distance measuring system for realizing the method, relating to a wireless distance measuring method and a system thereof, and resolving the problem of low accuracy caused by a reason that the existing distance measuring method of the wireless ad hoc network measures distance only in accordance with peak position. The measuring method comprises the steps: an emitting node emits a distance measuring signal to a target node; the target node emits the distance measuring signal after adding permanent delay; the emitting node receives the signal and conducts correlating transformation of fractional domain after conducting filtration and sampling; and the peak value and peak position of the result after transformation are detected to obtain estimation time delay; and the estimation time delay is multiplied by velocity of light to obtain the measuring result. A device uses related modules of the fractional domain to calculate a discrete sampling value. For the calculation result, a peak detector is used for detecting the peak position and the peak value, and then the peak position and the peak value are used for jointly estimating the distance and calculating the distance measuring result by moulds. The invention combines the related peak value with peak position to estimate the distance, thus improving the distance measuring accuracy, and being applicable to a plurality of fields such as battlefield communication, severe environment detection and the like.

Description

technical field [0001] The invention relates to a wireless ranging method and system, in particular to a method and system for realizing ranging by using a fractional Fourier transform domain correlation detection method. Background technique [0002] With the rapid development of mobile communication technology in recent years, more and more new technologies are constantly emerging. In order to meet the demand, a distributed ad hoc network that is different from the traditional cellular network public communication system has attracted people's attention, such as: wireless sensor network, Ad-hoc network, Mesh network, etc., and their common feature is that there is no center, Self-organizing and transmitting information through multi-hop. Since there is no need to set up infrastructure in advance (such as base stations, control centers and other equipment in the cellular network), the wireless ad hoc network has the characteristics of fast networking, flexible topology, lo...

Claims

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Application Information

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IPC IPC(8): G01S15/08H04W84/18
Inventor 沙学军宁晓燕迟永钢吴宣利梅林吴晓涛詹宗超
Owner HARBIN INST OF TECH