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Signal source positioning method of Duffing-Lorenz-based chaotic system

A positioning method and chaotic system technology, applied in positioning, radio wave measurement systems, measurement devices, etc., can solve the problem of inability to locate weak signal sources, and achieve the effects of increased sensitivity, improved positioning technology, and strong interference signals

Active Publication Date: 2015-05-20
YANSHAN UNIV
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Problems solved by technology

However, people only use chaos to detect weak signals, but they cannot locate the source of weak signals

Method used

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  • Signal source positioning method of Duffing-Lorenz-based chaotic system
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  • Signal source positioning method of Duffing-Lorenz-based chaotic system

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing:

[0024] like figure 1 As shown, the positioning method of the present invention mainly consists of three identical signal receivers, and the steps of the positioning method are as follows:

[0025] a. Three signal receivers are installed in different positions to establish a group of receiving base stations; each signal receiver is composed of the same autocorrelator and Duffing-Lorenz circuit, and the position information of the three signal receivers is recorded in the computer;

[0026] b. Before receiving the weak sine wave signal, according to the relationship between the output variables x, y, z, u, v of the Duffing-Lorenz formula and the independent variable t, select the variables representing x, y, z, u, v in each circuit The 5 output points are used as test points, and each Duffing-Lorenz circuit is adjusted so that the voltage waveforms of the x, y, z, u, and v v...

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Abstract

The invention discloses a signal source positioning method of a Duffing-Lorenz-based chaotic system. Signal receivers at three different positions form a group of receiving base stations and consist of same auto-correlators and Duffing-Lorenz circuits; before a weak signal is received, the Duffing-Lorenz circuits are adjusted to guarantee that output voltage waveforms of the circuits are chaotic waveforms; when the weak signal is received by the three signal receivers at different times respectively, the signal is denoised by the respective auto-correlator to serve as an input signal to be introduced into the respective Duffing-Lorenz circuits; the change of the voltage waveforms output by the three Duffing-Lorenz circuit circuits from the chaotic waveforms to large periodic waveforms is detected by using the detector and mutant site times t1, t2 and t3 are recorded; the mutant site times t1, t2 and t3 are input into a computer; the position of a signal source is calculated by using the computer. The method has the advantages of high sensitivity, accurate detection and positioning of the weak signal and the like.

Description

technical field [0001] The invention relates to the field of electronic signal communication, in particular to a signal source location method based on a Duffing-Lorenz chaotic system. Background technique [0002] There are many positioning methods in today's society, such as GPS positioning, base station positioning, WiFi AP positioning, Bluetooth positioning iBeacon, etc., each of which has its own advantages. However, they are all based on strong signals for positioning. For the positioning of weak signal sources, there is currently no established and reliable solution in China. In the field of weak signal detection, people have verified the feasibility of using the Duffing oscillator for signal detection. However, people only use chaos to detect weak signals, but they cannot locate the source of weak signals. Contents of the invention [0003] The purpose of the present invention is to provide a signal source location method based on Duffing-Lorenz chaotic system wi...

Claims

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Application Information

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IPC IPC(8): G01S5/04
CPCG01S5/04
Inventor 刘福才杨霞宋菲菲刘剑鸣
Owner YANSHAN UNIV
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