Error associated with the direction of arrival estimation in the presence of material bodies

Nun Yilmazer, Arijit De, Santana Burintramart, Tapan K. Sarkar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

In many adaptive signal processing applications, it is assumed that the direction of arrival of (DOA) of the signals is known. For a radar problem, this is true as we know along which direction we transmitted the beam, and therefore, we expect the radar return to be arriving from that direction. However, this assumption is questionable when there are material bodies near or along its path. Here, we address the question as to what happens to the direction of propagation when the electromagnetic wave encounters a material body near or along its path for the noise free case. Thus, the objective is to calculate the error associated with the prediction of DOA when the free space is not empty. We illustrate the error associated with the estimation of the DOA when there is a perfect electric conducting (PEC) sphere and a dielectric sphere along/near the path of propagation. A PEC and dielectric will diffract the incident electromagnetic energy. We evaluate the scattered far fields at a few points away from the obstacle. From the measured field points, we predict the DOA of the signal of interest. The simulations have been carried out using an electromagnetic simulator and a DOA estimation algorithm using the Matrix Pencil method. The examples deal with the case of both one- and two-dimensional antenna arrays and how they interpret the diffracted signals.

Original languageEnglish (US)
Title of host publication2008 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, APSURSI
DOIs
StatePublished - Nov 13 2008
Event2008 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, APSURSI - San Diego, CA, United States
Duration: Jul 5 2008Jul 12 2008

Publication series

Name2008 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, APSURSI

Other

Other2008 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, APSURSI
CountryUnited States
CitySan Diego, CA
Period7/5/087/12/08

Keywords

  • DOA (direction of arrival) estimation
  • Diffraction
  • Matrix pencil method

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Communication

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  • Cite this

    Yilmazer, N., De, A., Burintramart, S., & Sarkar, T. K. (2008). Error associated with the direction of arrival estimation in the presence of material bodies. In 2008 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, APSURSI [4619292] (2008 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, APSURSI). https://doi.org/10.1109/APS.2008.4619292