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Electronic Warfare Digital Radar Receiver

Electronic Warfare Digital Radar Receiver. By: Peter Petrany & Michael Gahl. Advisors: Dr. Huggins, Dr. Ahn & Mr. Jim Jensen. Bradley University Peoria, IL Department of Electrical and Computer Engineering. Outline. Background/Theory Project Statement Top level Block Diagram

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Electronic Warfare Digital Radar Receiver

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  1. Electronic Warfare Digital Radar Receiver By: Peter Petrany & Michael Gahl Advisors: Dr. Huggins, Dr. Ahn & Mr. Jim Jensen Bradley University Peoria, IL Department of Electrical and Computer Engineering

  2. Outline • Background/Theory • Project Statement • Top level Block Diagram • RF Front end (with PLL) • FFT to find RF signal characteristics • Simulink Simulation • Division of Labor (schedule)

  3. Background • What is an EWDigRec? Receives unknown RF signal Determines characteristics • What are the Applications? National Defense • Jamming • Spoofing

  4. Project Statement Develop RF front end to receive RF signal and sample with DAQ From FFT of sampled data, generate RF characteristics

  5. Top Level Block Diagram 00 01 10 11

  6. Characteristics fRF • RF frequency (fRF) • Pulse Width (PW) • Pulse Repetition Rate (PRR) PW 1/PRR

  7. Sub Level Block Diagram

  8. Sub Level Block Diagram IF • LNA- receives RF signal • PLL- produces LO frequency • Mixer- downconverts RF signal • IF- sampled by DAQ

  9. IF Range Locating FFT 1MHz 5MHz

  10. Sub Level Block Diagram

  11. Sub Level Block Diagram • DAQ- samples IF signal • DSP- performs FFT and extracts RF characteristics • Monitor- displays RF characteristics and signal detection

  12. Finding RF Characteristics via FFT (1) (3) w(t) s(t)=w(t) p(t) p(t) (2)

  13. Finding RF Characteristics via FFT Frequency Domain Time Domain Frequency Domain Time Domain

  14. Finding RF Characteristics via FFT

  15. Finding RF Characteristics via FFT CHARACTERISTICS 1 2 3

  16. Finding RF Characteristics via FFT = = 1 CHARACTERISTICS 1 2 3 = PRR = 0 1 PW

  17. RF signal

  18. fRF=33.3 Hz PW = 0.1 s Simulink

  19. PRR = 0.5 s fRF = 33.33 Hz PW = 0.1 s

  20. Flowchart

  21. Flowchart

  22. Fast Fourier Transform (FFT)

  23. PRR = 0.5 s 1/PW = 0.1 s fIF = 33.33 Hz

  24. Schedule of Labor

  25. Questions Electronic Warfare Digital Radar Receiver By: Peter Petrany & Michael Gahl Bradley University Peoria, IL Department of Electrical and Computer Engineering

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