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Learning-Sensing-Decision-Response Method under Wideband Cognitive Passive Radar Architecture

A passive radar, broadband technology, applied in radio wave measurement systems, instruments, etc., can solve the problem of inapplicability of passive radar systems, and achieve the effect of improving clutter interference suppression effect, good performance, and improving angle estimation accuracy.

Inactive Publication Date: 2019-06-14
TIANJIN UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

Both the cognitive radar proposed by Hykin and the knowledge-assisted radar architecture proposed by Guerci require transmitter adaptation, which is not applicable to passive radar systems

Method used

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  • Learning-Sensing-Decision-Response Method under Wideband Cognitive Passive Radar Architecture
  • Learning-Sensing-Decision-Response Method under Wideband Cognitive Passive Radar Architecture
  • Learning-Sensing-Decision-Response Method under Wideband Cognitive Passive Radar Architecture

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Embodiment Construction

[0037] The present invention adopts a broadband cognitive passive radar architecture, which is mainly composed of a learning-perception-decision-response method.

[0038] 1) The purpose of learning is to make judgments like experts. The more perfect the knowledge structure is, the more conducive it is to make correct judgments. After all, the non-cooperative external radiation source is not specially designed for the radar system, so it is first necessary to build a comprehensive evaluation system to realize the cognition of the radiation source. The learning content includes detection performance such as bistatic performance / fuzzy function under multistatic configuration, Cramer-Rao bound of parameter estimation, false alarm probability, detection probability, etc., to achieve a complete description of waveform, channel, target and geometric configuration, Make a comprehensive evaluation of the source of exposure. In addition, it is necessary to study the background performa...

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Abstract

The invention relates to the field of passive radar, in particular to a software radio conception based broadband cognitive passive radar system architecture which has an environmental perception capability, a broadband sampling capability, a high-performance digital signal processing capability and a dynamic receiver parameter regulation capability. The method includes: step one, establishing a signal model which comprises non-orthogonal transmission signals, fading channels and direct wave and target echo receiving signals; step two, unifying a fuzzy function, Cramer-Rao bound and detection performances to a general detection theoretical framework; step three, assessing results based on a performance bound given by an assessment system; step four, improving signal quality of a direct wave channel and a target echo channel according to own characteristics of a mobile communication irradiation source. The method is mainly applied to design and manufacture of passive radar systems.

Description

technical field [0001] The invention relates to the field of passive radar, a broadband cognitive passive radar system framework based on software radio thinking, which has environment perception capability, large bandwidth sampling capability, high-performance digital signal processing capability and dynamic adjustment receiver parameter capability. Background technique [0002] Professor Huge Griffiths of University College London and other well-known professors in the field of radar jointly wrote an article in Proceeding of the IEEE that the design of future radar systems must start from the perspective of improving the utilization of spectrum resources. Passive radar, waveform diversity, bionic design and authentication The known method is an effective way to solve the spectrum congestion. [0003] Passive radar (also known as passive radar, external radiation source radar) does not emit electromagnetic waves itself, but uses external radiation sources for target detecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 汪清杨杭赵爽方浩宇杨耀通
Owner TIANJIN UNIV
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