Sparse Antenna and Pulse Placement for Colocated MIMO Radar

Ehsan Tohidi, Mario Coutiño Minguez, Sundeep Prabhakar Chepuri, Hamid Behroozi, Mohammad Mahdi Nayebi, Geert Leus

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)
93 Downloads (Pure)

Abstract

Multiple-input multiple-output (MIMO) radar is known for its superiority over conventional radar due to its antenna and waveform diversity. Although higher angular resolution, improved parameter identifiability, and better target detection are achieved, the hardware costs (due to multiple transmitters and multiple receivers) and high-energy consumption (multiple pulses) limit the usage of MIMO radars in large scale networks. On one hand, higher angle and velocity estimation accuracy is required, but on the other hand, a lower number of antennas/pulses is desirable. To achieve such a compromise, in this paper, the Cramér-Rao lower bound (CRLB) for the angle and velocity estimator is employed as a performance metric to design the antenna and the pulse placement. It is shown that the CRLB derived for two targets is a more appropriate criterion in comparison with the single-target CRLB since the two-target CRLB takes into account both the mainlobe width and the sidelobe level of the ambiguity function. In this paper, several algorithms for antenna and pulse selection based on convex and submodular optimization are proposed. Numerical experiments are provided to illustrate the developed theory.

Original languageEnglish
Article number8537943
Pages (from-to)579-593
Number of pages15
JournalIEEE Transactions on Signal Processing
Volume67
Issue number3
DOIs
Publication statusPublished - 2019

Keywords

  • Angle and velocity estimation
  • antenna placement
  • MIMO radar
  • submodularity
  • two-target CRLB
  • pulse placement

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