Focusing Filters for Wide-Band Direction Finding

S. Sivanand, Jar-Ferr Yang, M. Kaveh

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The frequency domain preprocessing in the coherent signal-subspace method (CSM) for wide-band direction finding involves the alignment/focusing of the signal subspaces at different frequencies via transformations to obtain a coherent signal subspace. Time domain equivalents of focusing are derived based on the least squared error approach for general transformations and the Taylor series expansion approach for closed-form transformations. The preprocessor is realized by a multichannel digital FIR filter. For diagonal transformations, the problem reduces to implementing different delays at each sensor which in turn leads to computational simplicity. Various tapped delay line filters for realizing an arbitrary delay are proposed and compared. Simulation results reveal that indeed low-order filter structures in the time domain approach achieve similar performance to the frequency domain approach even at detection and resolution thresholds.

Original languageEnglish
Pages (from-to)437-445
Number of pages9
JournalIEEE Transactions on Signal Processing
Volume39
Issue number2
DOIs
Publication statusPublished - 1991 Jan 1

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Taylor series
FIR filters
Electric delay lines
Digital filters
Sensors

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering

Cite this

Sivanand, S. ; Yang, Jar-Ferr ; Kaveh, M. / Focusing Filters for Wide-Band Direction Finding. In: IEEE Transactions on Signal Processing. 1991 ; Vol. 39, No. 2. pp. 437-445.
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Focusing Filters for Wide-Band Direction Finding. / Sivanand, S.; Yang, Jar-Ferr; Kaveh, M.

In: IEEE Transactions on Signal Processing, Vol. 39, No. 2, 01.01.1991, p. 437-445.

Research output: Contribution to journalArticle

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