Removal of aliasing in pulse-to-pulse Doppler radar measurements
Article first published online: 7 DEC 2012
Copyright 1989 by the American Geophysical Union.
Volume 24, Issue 6, pages 697–704, November-December 1989
How to Cite
1989), Removal of aliasing in pulse-to-pulse Doppler radar measurements, Radio Sci., 24(6), 697–704, doi:10.1029/RS024i006p00697., , and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 2 AUG 1989
- Manuscript Received: 27 FEB 1989
Frequency aliasing is a problem often encountered in pulsed radar studies of some deep targets, such as the radar aurora. It is possible to resolve the aliasing ambiguities by transmitting closely spaced pulse pairs, rather than single pulses. Instead of the usual power spectrum, we compute a cross spectrum of the received signals. The amplitude of this cross spectrum is just the normal, possibly aliased, power spectrum, and the phase determines the aliasing, if any, at each frequency bin. The technique works as long as the spectrum is not seriously wrapped around upon itself, that is, as long as each frequency bin is dominated by signals with a single Doppler shift, no matter what that Doppler shift may be. The price paid for this extra information is the addition of radar clutter, uncorrelated signals from unwanted ranges, but this price may be acceptable.