Short-wave remote radiation source one-step locating method based on wide-area distributed single-antenna receiving

A distributed, single-antenna technology, used in positioning, radio wave measurement systems, instruments, etc., to achieve the effect of improving estimation accuracy and reliable algorithm performance

Active Publication Date: 2018-08-03
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the existing popular short-wave remote radiation source positioning technology, the present invention provides a short-wave long-range radiat

Method used

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  • Short-wave remote radiation source one-step locating method based on wide-area distributed single-antenna receiving
  • Short-wave remote radiation source one-step locating method based on wide-area distributed single-antenna receiving
  • Short-wave remote radiation source one-step locating method based on wide-area distributed single-antenna receiving

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Experimental program
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Effect test

Embodiment

[0041] see Figure 1~2 As shown, a one-step positioning method for short-wave remote radiation sources based on wide-area distributed single-antenna reception, specifically includes the following steps:

[0042] Step 1: Perform time-frequency synchronization on the receiving systems of N wide-area distributed single-antenna short-wave monitoring stations, and collect sky-wave propagation signals from external short-wave remote radiation sources to obtain signal time-domain series data;

[0043] Step 2: Perform Fourier transform operation on the collected M time-domain data sample points for each single-antenna short-wave monitoring station to obtain signal frequency-domain data;

[0044] Step 3: Transmit the signal frequency domain data obtained by each single-antenna shortwave monitoring station to the main server of the central station through the network, and based on the ionospheric height value obtained by the ionospheric detection system and the signal frequency domain d...

specific Embodiment

[0048] Specific examples: see Figure 1~2 As shown, a one-step positioning method for short-wave remote radiation sources based on wide-area distributed single-antenna reception, specifically includes the following steps:

[0049] Step 1, the time-domain model of the signal received by the nth (n=1,2,...,N) single antenna in the wide-area distributed short-wave monitoring station is

[0050] x n (t) = α n s[t-τ n (p,h n )-t 0 ]+ε n (t) (n=1,2,...,N)

[0051] Among them, p represents the position vector of the short-wave remote radiation source, h n Indicates the ionospheric reflection height experienced by the short-wave long-range radiation source propagating to the nth short-wave monitoring station through sky waves, t 0 Indicates the emission time of the short-wave remote radiation source, s(t) represents the complex envelope of the radiation signal of the short-wave remote radiation source, α n Indicates the loss factor of the target signal propagating to the nth ...

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Abstract

The invention relates to a short-wave remote radiation source one-step locating method based on wide-area distributed single-antenna receiving. The method comprises the steps: building a mathematic model of an arrival signal relative to a short-wave remote radiation source position function based on the short-wave antenna signal propagation principle; converting the wide-area distributed single-antenna received data into frequency domain data based on the technology of Fourier transform, and building a mathematic function model of the short-wave remote radiation source position and the heightof an ionized layer through an initial measured value of the height of the ionized layer and the maximum likelihood estimation criteria; finally obtaining the short-wave remote radiation source position information in a one-step mode based on the particle filtering or iteration optimization algorithms. According to the invention, there is no need of a large-scale array receiving station, and the method can achieve the high-precision one-step locating of the short-wave radiation source on the basis of a conventional wide-area distributes short-wave network through the single-channel receiving and algorithm software updating. The performances of the algorithms are reliable, and the method has great values in the fields of civil short-wave radio management and military short-wave radio detection.

Description

technical field [0001] The invention relates to the field of long-distance positioning of short-wave radio radiation sources, in particular to a one-step positioning method for short-wave long-distance radiation sources based on wide-area distributed single-antenna reception. Background technique [0002] Short-wave electromagnetic waves can be widely used in the fields of long-distance communication, broadcasting and radar by using the refraction effect of the ionosphere, and are playing an increasingly important role in the fields of national economy, government work, political diplomacy, national security and modern military. Under normal circumstances, the use of radio frequency spectrum and transmitting equipment needs to be approved by the radio management department, must comply with the requirements of relevant laws and regulations, and must not be used arbitrarily. However, on the one hand, after a long period of development of short-wave radio technology, the spect...

Claims

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Application Information

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IPC IPC(8): G01S5/02
CPCG01S5/02
Inventor 高火涛高可至
Owner WUHAN UNIV
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