Time Frequency Analysis Application - Radar

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Time Frequency Analysis Application - Radar. 電機四 B99901084 林晉毅 2013.12.12. Outline. Introduction Radar Signal Range Profile Time-Frequency Analysis of Radar Range Profiles Time-Frequency Representation of Range Profiles Time-Frequency-Based Radar Image Formation - PowerPoint PPT Presentation

Transcript of Time Frequency Analysis Application - Radar

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Time Frequency Analysis

Application - Radar

電機四 B99901084 林晉毅2013.12.12

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Outline• Introduction

o Radar Signalo Range Profile

• Time-Frequency Analysis of Radar Range Profileso Time-Frequency Representation of Range Profiles

• Time-Frequency-Based Radar Image Formationo Fourier-Based Radar Image Formationo Time-Frequency-Based Radar Image Formation

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Introduction• RADAR(Radio Detection and Ranging)

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Introduction

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Introduction• Scattering

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Radar Signal• Linear Frequency Modulated Signal(LFM)

o f0 : carrier frequencyo : frequency-changing rate or chirp rateo α : determines the width of the Gaussian envelope

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Radar Signal

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Radar Signal• Stepped Frequency Signal(SF)

o TPRI : Pulse Repetition Intreval

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Radar Signal

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Range Profile• Range Profile : a range-compressed back-

scattered signal - the distribution of target reflectivity along the radar line of sight (LOS) to the target, provided target information about target length and position of strong scatterers.

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Cross Range Profile• Cross Range : the dimension transverse to the

radar LOS

• Doppler Profile Cross Range Profile• 2D : Range-Doppler Profile Range-Cross Range

Profile(knowing scaling factor : rotation rate & λof transmitted signal)

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Doppler Profile

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Time-Frequency Analysis of Radar Range Profiles

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Time-Frequency Representation of Range Profiles

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Time-Frequency Representation of Range Profiles

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Time-Frequency Representation of Range Profiles

13.1GHz

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Time-Frequency Representation of Range Profiles

TE10

TE20

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Time-Frequency-Based Radar Image Formation

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Fourier-Based Radar Image Formation

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Time-Frequency-Based Radar Image Formation

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Time-Frequency-Based Radar Image Formation

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