Combined estimation algorithm based on broadcast signal passive positioning

A technology of passive positioning and joint estimation, which is applied in the field of electronic information, can solve the problems of imperfect joint estimation of wave arrival signal delay, no passive positioning system, etc., and achieve the effect of increasing notch characteristics

Inactive Publication Date: 2016-08-24
SOUTHWEST UNIVERSITY
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[0007] The purpose of the present invention is to provide a joint estimation algorithm based on broadcast signal passive positioning, aiming

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  • Combined estimation algorithm based on broadcast signal passive positioning
  • Combined estimation algorithm based on broadcast signal passive positioning
  • Combined estimation algorithm based on broadcast signal passive positioning

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[0055] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0056] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0057] A joint estimation algorithm based on broadcast signal passive positioning, the joint estimation algorithm based on broadcast signal passive positioning is:

[0058] Form a practical passive positioning system by processing several technologies of the passive positioning system;

[0059] Weak signal detection and extraction in complex multipath environment, and target signal DOA estimation, arrival signal delay TD estimation and Doppler frequency f d Est...

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Abstract

The invention discloses a combined estimation algorithm based on broadcast signal passive positioning, and the algorithm comprises the steps: carrying out the processing of a plurality of key techniques of a passive positioning system, and forming a practical passive positioning system; carrying out weak signal detection and extraction in a complex multi-path environment, carrying out combined estimation: the estimation of DOA (Direction of Arrival) of a target signal, the estimation of TD (time delay) of a wave arrival signal and the estimation of fd (frequency of doppler). The method starts the angle of array signal processing, and gives consideration to the complex environment of the target signal. The method achieves the invention of the time delay, Doppler frequency detection and DOA estimation of the weak target signal. A passive coherent positioning system based on the non-cooperative irradiation target passive detection technology is great in hiding performance, can detect a stealth target, has the capability of preventing low-altitude defense penetration, and therefor is of great strategic importance to the national modernization of national defense in a modern war environment.

Description

technical field [0001] The invention belongs to the technical field of electronic information, in particular to a joint estimation algorithm based on broadcast signal passive positioning. Background technique [0002] Passive positioning has been paid more and more attention in modern warfare. In particular, our country still does not have a more accurate passive positioning system; the research on passive positioning will be of great significance to our country's national defense. The passive positioning method based on external radiation sources uses broadcasting or FM broadcasting transmitters as its radiation source, and uses a large number of widely distributed cheap receiving radios instead of a single large antenna system. There has been a big improvement. It has the advantages of anti-reconnaissance, anti-jamming, anti-stealth, and anti-radiation weapons. For various active radars, we know that it can locate various position parameters of the detected target by pr...

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Application Information

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IPC IPC(8): G01S13/06G01S7/41
CPCG01S7/41G01S7/411G01S13/06
Inventor 刘东卓郭松涛杨元元陈孟刚石亚伟
Owner SOUTHWEST UNIVERSITY
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