Array radar resource management Alexander Charlish* and Fotios Katsilieris*
3.5 Summary
cost radar time budget and are not so effective in the presence of time corre- lated clutter.
● Tracking function:Revisit intervals and waveforms for targets maintained with active tracking can be selected with rules and heuristics; however, this approach is wasteful of radar resources. Alternatively, the revisit interval can be selected to ensure that the target does not manoeuvre out of the radar beam, and the dwell length can be selected so that a specified SNR is achieved based on an estimate of the target’s RCS. Consequently, the revisit interval and dwell time vary depending on target manoeuvres and range. In addition, the intra- pulse waveform modulation can be selected to complement the existing information on the target in the tracker.
The influence of many of these radar control parameters have been considered previously in radar system design; however, the benefit with ESA radar is that the radar resource manager can vary these control parameters during operation in response to operational requirements and the encountered scenario. These ESA resource management methods are extended in Vol. II, Chapter 5 ‘Cognitive radar management’, where optimization methods such as quality-of-service optimization and stochastic control are applied.
Glossary
CRLB Crame´r–Rao lower bound DTF desired time first
EDF earliest deadline first ESA electronically steered array ETF earliest time first
FM frequency modulation IMM interacting multiple model PRF pulse repetition frequency PRI pulse repetition interval RCS radar cross section SNR signal-to-noise ratio TWS track-while-scan/search References
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