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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Thank You For Your Attention