Abstract
There is a requirement for waveform orthogonality on dual or multiple channel radars to avoid cross-channel interferences. It is additionally favored that dual-channel polarization-orthogonal radars are capable of estimating target Polarization Scattering Matrix (PSM) elements simultaneously, that is within one Pulse/sweep/frame Repetition Interval (PRI). The current solution for simultaneity in Linear Frequency Modulated Continuous Wave (LFMCW) radars is to use a pair of nearly-orthogonal waveforms within the same frequency band with opposite frequency excursion slopes. This solution does not provide full orthogonality because of its susceptibility to some cross-channel interferences, where their mitigation result in difficult-to-suppress unwanted artifacts after range compression, in addition to opposite sign residual video phases which are difficult to compensate for. We propose a new pair of independent waveforms - along with their required processing steps - which satisfy both the orthogonality and simultaneity requirements, but with less undesirable artifacts than the opposite slope chirps. In this paper we present results from experimentation with simulated and radar-measured data for the new waveform. We found closely comparable results with the baseline of standard LFMCW processing. We aim to operationally use the new waveform-pair on the TuDelft PARSAX polarimetric radar.
Original language | English |
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Title of host publication | Signal Processing Symposium 2017 (SPSympo) |
Place of Publication | Piscataway, NJ |
Publisher | IEEE |
Pages | 1-4 |
Number of pages | 4 |
ISBN (Electronic) | 978-1-5090-6755-8 |
DOIs | |
Publication status | Published - 2017 |
Event | Signal Processing Symposium 2017: SPSympo 2017 - Jachranka Village, Poland Duration: 12 Sept 2017 → 14 Sept 2017 http://spsympo.ise.pw.edu.pl/ |
Conference
Conference | Signal Processing Symposium 2017 |
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Country/Territory | Poland |
City | Jachranka Village |
Period | 12/09/17 → 14/09/17 |
Internet address |
Keywords
- FMCW
- CWLFM
- De-ramping
- Radar waveform design
- Radar signal processing