Time Delay Estimation Performance in a Scattering Medium

  • S. Prasad Indian Institute of Technology, New Delhi
  • M. S. Narayanan Defence Research and Development Organization, Sena Bhavan, New Delhi
  • S. R. Desai Indian Navy
Keywords: Array aperture, Bearing measurement, Angular dispersion

Abstract

The effects of a scattering medium on the performance of time delay estimation are considered. The medium is assumed to exhibit angular scattering, causing angular (as well as delay) dispersion and hence loss of signal coherence across the array aperture. Both the variance (via the Cramer-Rao bound) and the bias introduced in the time-delay estimates are studied. The results have been converted to bearing and range error standard deviation and bias. It is found from these studies that there is an optimum range of values for the separation distance between the sensors in the design of an array for time delay estimation, for range and bearing measurements.

Author Biographies

S. Prasad, Indian Institute of Technology, New Delhi
Indian Institute of Technology, New Delhi-110016.
M. S. Narayanan, Defence Research and Development Organization, Sena Bhavan, New Delhi
Defence Research and Development Organization, Sena Bhavan, New Delhi-110001.
S. R. Desai, Indian Navy
Indian Navy
Published
2014-01-23
How to Cite
PrasadS., NarayananM., & DesaiS. (2014). Time Delay Estimation Performance in a Scattering Medium. Defence Science Journal, 35(3), 313-325. https://doi.org/10.14429/dsj.35.6025
Section
Special Issue Papers