A high-resolution algorithm for complex spectrum search
作者:
I-Tai Lu,
Robert C. Qiu,
Jaeyoung Kwak,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1998)
卷期:
Volume 104,
issue 1
页码: 288-299
ISSN:0001-4966
年代: 1998
DOI:10.1121/1.423279
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The principal aim of this work is to estimate, or to approximate, the complexk-space spectrum of the wave field arriving on a linear array. First, using linear approximation, the location-dependent effect of the wave field magnitudes is modeled as an extra “loss” factor in the complex spectral variable. This complex spectrum model may provide a better description of the physical process and require less sensor elements than the real spectrum model because of the additional degree of freedom provided by the “loss” factor. A high-resolution algorithm combining the singular value decomposition method and the eigen-matrix pencil method is then employed to find the complex spectra representing the incoming real spectrum and the location dependent factors of multipath and multimode arrivals. Five key features (noise immunity, robustness, resolution, accuracy, and physical insight) of the proposed algorithm are studied using numerical examples.
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