Focusing Filters for Wide-Band Direction Finding

S. Sivanand, Jar Ferr Yang, M. Kaveh

研究成果: Article同行評審

22 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)437-445
頁數9
期刊IEEE Transactions on Signal Processing
39
發行號2
DOIs
出版狀態Published - 1991 二月

All Science Journal Classification (ASJC) codes

  • 訊號處理
  • 電氣與電子工程

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