High-resolution direct position determination using MVDR

Liran Tzafri*, Anthony J. Weiss

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

The direct position determination (DPD) approach is a single-step method, which uses the maximum likelihood estimator to localize sources emitting electromagnetic energy using combined data from all available sensors. The DPD is known to outperform the traditional two-step methods under low signal-to-noise ratio conditions. We propose an improvement to the DPD approach, using the well-known minimum-variance-distortionless-response (MVDR) approach. Unlike maximum likelihood, the number of sources needs not be known before applying the method. The combination of both the direct approach and MVDR yields unprecedented localization accuracy and resolution for weak sources. We demonstrate this approach on the problem of multistatic radar, but the method can easily be extended to general localization problems.

Original languageEnglish
Article number7500062
Pages (from-to)6449-6461
Number of pages13
JournalIEEE Transactions on Wireless Communications
Volume15
Issue number9
DOIs
StatePublished - Sep 2016

Keywords

  • Positioning algorithms
  • adaptive array processing
  • direct position determination
  • maximum likelihood estimation
  • minimum variance distortionless response (MVDR)

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