Bearing estimation in the presence of near-field sources

Yih Min Chen, Ju Hong Lee, Chien Chung Yeh

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


Most high-resolution bearing estimation algorithms have been based on the assumption of a far-field source environment. When this assumption is violated, i.e., when some sources are in the near field, these algorithms generally show unsatisfactory performance. An algorithm to tackle this problem using a uniform linear array is proposed. The observed signal covariance matrix of near-field sources is equivalently viewed as a corrupted measurement of the ideal signal covariance matrix of far-field sources located at the same bearings. A far-field approximation (FFA) covariance matrix is reconstructed from the observed covariance matrix to reduce the corruptions. Therefore, existing high-resolution bearing estimation techniques (e.g., MUSIC) can be directly applied to estimate the bearings of the near-field sources. Simulation results demonstrating the effectiveness of this approach are presented.

Original languageEnglish
Pages (from-to)1474-1477
Number of pages4
JournalIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
StatePublished - 1990
Event1990 Antennas and Propagation Symposium Digest - Dallas, TX, USA
Duration: 7 May 199011 May 1990


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