Multi-Sensor Array Time-Delay Estimation with Small Phase Incoherences

Abstract

The maximum likelihood (ML) estimator for time-delay in a multisensor array in the presence of small phase incoherences is derived. The structure obtained is the canonical ML estimator with a correction term to compensate for the phase. The Cramer-Rao matrix bound is developed and used to evaluate the standard deviation of the time-delay estimate (TDE) as a function of system parameters such as number of sensors, phase variance, bandwidth and center frequency of the source. The curves indicate a sensitivity, at low input SNR, of the TDE variance to phase standard deviation and signal center frequency.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1984
Accession Number
ADA138867

Entities

People

  • C. T. Chen
  • S. C. Schwartz

Organizations

  • Princeton University

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  • Ground and Sea Platforms
  • Sensors
  • Weapons Technologies

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  • Engineering

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