Doppler Influence on Waveform Orthogonality in 79GHz MIMO Phase-Coded Automotive Radar

Jeroen Overdevest, Feike Jansen, Faruk Uysal, Alexander Yarovoy

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Utilization of phase-coded waveforms in automotive MIMO radars for short to medium range applications is studied. Performances of three most-promising binary code families (Gold, APAS and ZCZ sequences) are compared. Design tradeoffs of practical implementation of phased-coded waveforms for MIMO radar are analyzed for the first time for a possible future System on Chip implementation. Orthogonality of the waveforms in case of moving targets is analyzed. The implications of the code properties for the Range-Doppler map, as well as the Range-Angular map, are pointed out. Doppler frequency shift impact on such performance indicators as the target peak power and range sidelobe levels in the range-Doppler plane, as well as the range and azimuth sidelobe behavior, and the angular error in the azimuthal plane have been comprehensively studied for the first time. It is shown that the time-staggered transmit scheme with autocorrelation properties only (while introducing azimuthal errors) results in improved performance compared to code division multiplexing with auto- and cross-correlation properties.
Original languageEnglish
Article number8891682
Pages (from-to)16-25
Number of pages10
JournalIEEE Transactions on Vehicular Technology
Volume69
Issue number1
DOIs
Publication statusPublished - 2020

Keywords

  • Automotive radar
  • Doppler influences
  • PMCW
  • binary sequences
  • waveform orthogonality

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