 2019 - 2020 | |||||||||||||||||||||||||||||
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| 0510-7204-01 | Radar Principles-Extended | ||||||||||||||||||||||||||||
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| FACULTY OF ENGINEERING | |||||||||||||||||||||||||||||
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University credit hours: 3.0
Course description
Radar Principles - Extended / Prof. Nadav Levanon
Radar Principles - Extended / Prof. Nadav Levanon
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Syllabus
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Week
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Introduction: History of radar. Doppler effect. Generic block diagrams. Propagation in the atmosphere. Coherence in radar.
The radar equation.
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1
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Radar cross section: Deterministic targets, fluctuating targets. Swerling models.
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2
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Radar wave propagation above surface: Multipath, clutter, Normalized radar cross section (NRCS).
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3
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Detection in the presence of noise (fixed threshold): Probability of detection - Pd, Probability of false alarm – Pfa. Threshold detection. Relationship between Pd, Pfa and SNR in detecting fixed and fluctuating targets. Albersheim’s approximation. Integration (coherent and non-coherent) of returns from many pulses and the resulted SNR improvement. SNR improvement dependence on target Swerling model.
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4
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Constant False Alarm Rate (CFAR) detection methods.
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5
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Radar waveforms, tools for design and analysis: Complex envelope of narrow-band signals. I/Q components. Matched filter, Ambiguity function (range-Doppler diagram) – definitions and properties. The periodic ambiguity function.
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6
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Basic radar waveforms: Fixed frequency pulse. Linear FM pulse.
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7
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Advanced radar waveforms for high delay and Doppler resolution: Coherent pulse train, LFM pulse train. Sidelobe reduction in delay and Doppler. Binary and polyphase coded waveforms. Complementary sequences. Stepped-frequency pulse train. Noise-like signals. Multicarrier waveforms.
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8
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Sidelobe reduction using mismatched filters.
Improving waveform spectrum efficiency.
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9
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Moving Target Indicator (MTI): Pulse cancellers, FFT processing. Improvement factors. Blind speed. Staggered PRF. Airborne MTI. Airborne space time processing.
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10
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11
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Measurement and estimation Vs. detection in radar: Measurement accuracy at low SNR situation. Angle tracking (beam switching, conical scan, monopulse).
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12
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CW radar: Periodic CW waveforms. Analyses using the periodic ambiguity function. LFM-CW processing using “stretch” approach.
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13
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Miscellaneous radars: Multiple Input Multiple Output (MIMO) concepts. Imaging methods in Synthetic Aperture Radar (SAR).
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14
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