Coherent Integration With Range Migration
Using Keystone Formatting
March 2007
R. P. Perry, The MITRE Corporation
R. C. DiPietro, The MITRE Corporation
R. L. Fante, The MITRE Corporation
ABSTRACT
Coherent integration has been used in
matched filter radar signal processing to
increase target signal to noise ratios.
Currently radar designers apply a rule of
thumb that a target must remain in the
same range resolution cell during the
coherent integration time. Thus Doppler
processing depends mainly on the change
in phase from pulse to pulse. This results
in limiting either the range resolution or
Doppler resolution of the radar enabling
very high range resolution or very high
Doppler resolution but not both. We
present here an approach to radar matched
filtering which does not have these
limitations and can produce simultaneous
high range and high Doppler resolution
matched filter outputs. The new matched
filter coherently integrates the radar data
even though the target scatterers move
through many range resolution cells
during the coherent integration time.
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