At a glance
- 22 - 26 Mar 2021
- Duration5 days
- LocationNSWC Crane, Indiana, USA
Course structureLectures, tutorials, video demonstrations, computer-based exercises
What you will learn
On successful completion of this module a student should be able to:
Knowledge and Understanding:
- Identify and demonstrate the principles underlying radar detection in noise and clutter, relating these principles to conventional radar system design. Critically evaluate the detection performance of a radar system, given its design parameters.
- Evaluate the specialist properties and particular operational advantages of modern multi-function radar and SAR systems. Produce a viable radar system design, given a suitable specification of the required radar performance.
RADAR Electronic Warfare
- Use concepts of sensitivity, resolution and discrimination to analyse the capabilities and applications of receivers used in ES.
- Identify the role and quantify the performance of a modern radar system, given suitable data regarding its transmissions.
- Summarize and assess the various electronic attack and associated defence measures applicable to modern radar systems against a given specifications.
• Introduction: comparison with other sensors, frequency bands, relationship between size, wavelength and range ,target data, historical notes.
• Radar detection theory: radar range equation, Pd, Pfa and SNR relationships, FAR, No. hits, Integration (quadrature detection).
• Pulsed Radar Parameters: PRF, pulse width, duty ratio, peak and average powers, min range, eclipsing, max unambiguous range, low PRF, spectrum of pulsed radar, signal bandwidth, matched reception, range resolution. Search radar application.
• Losses: effect of clear air, precipitation, multipath; Losses associated with radar system, including the antenna (beam-shape loss).
• CW and FM ranging: The Doppler Effect, Doppler sensing, clutter rejection, Doppler filtering/velocity gating. Two phase linear saw-tooth modulation, ranging, effect of Doppler, velocity and range measurement. Missile seekers.
• Radar cross-section: principal factors; surface reflection effects; forms of scattering; echo mechanisms; variation of RCS with angle; typical values; Swerling models.
• Pulse compression: frequency coding (FMOP); Phase coding (PMOP); matched filtering; range and velocity resolution; compressed pulse width; range-velocity coupling.
• Clutter: surface and volume backscatter coefficient; spatial and temporal variation; estimation of clutter return and signal-to-clutter ratio for volume and surface clutter; statistical description for clutter; clutter spectrum and de-correlation time.
• CFAR: Constant false alarm rate systems; Clutter statistics and CFAR performance.
• Pulse-Doppler radar: principle of operation; clutter spectrum; characteristics of HPRF and MPRF systems; FMICW in range measurement; multiple PRFs in range measurement. Airborne early-warning radar: requirements; design drivers and solution; typical parameters. Battlefield surveillance radar: requirements; system design; unambiguous range and velocity measurement.
• MTI radar: System diagram; clutter rejection by single and double delay line cancellers; blind speed.
• GMTI: MTI from an airborne platform, target measurement accuracy in range and in angle; clutter Doppler spread Tracking Radar. Monopulse and conical scan angle- trackers; range and velocity gates for range and Doppler tracking; angle-tracking errors; track-while-scan systems; continuity tracking
Synthetic Aperture Radar: cross range resolution, unfocussed SAR, focussed SAR, array length, array processing, resolution, Doppler Beam Sharpening.
RADAR Electronic Warfare
• Radar ES: Operational use; Calculation of ES sensitivity; The radar/ES detection battle; The requirements for a quiet radar; The ES process; Observable parameters; Antenna configurations for AOA measurement; Probability of intercept; Intercept analysis; Signal Sorting.
• Radar EA: Jamming techniques and strategies; SJNR calculations; range-gate and velocity-gate pull-off; angle deception against monopulse trackers; deception and decoy techniques; DRFMs.
• Radar ED: Frequency and PRF agility; polarisation diversity; power management; sidelobe suppression; dual-band technique.
• Low probability of intercept radar waveforms: Power management, wideband FM, PSK: pseudo-random phase coding (maximal length sequences), poly-phase. Coding (Frank, P1, 2, 3, 4 codes), FSK: frequency hopping (Costas sequences), hybrid approaches.
• Anti-Radiation Missile Seekers: ARM operational modes and impact on seeker, monopulse seeker design, detection ranges, example designs.
Who should attend
Read our Professional development (CPD) booking conditions.