| Autor: |
S.I. Chou |
| Rok vydání: |
2005 |
| Předmět: |
|
| Zdroj: |
1990 Conference Record Twenty-Fourth Asilomar Conference on Signals, Systems and Computers, 1990.. |
| DOI: |
10.1109/acssc.1990.523331 |
| Popis: |
This report begins with a survey of narrowband direction-finding algorithms in element space. Then it discusses a simple stress measure to direction-finding algorithms applied to scenarios with two sources. Eigenvalue weighting appears in some noise subspace methods, in parametric signal subspace fitting methods, and in nonparametric subspace adaptive nulling beamforming. For a two-source array-processing scenario, normalized large and small eigenvalues are reduced to forms depending only on a real triplet. Presented also are some easy-to-remember formulas that enable one to exercise 'back-of-envelope' assessment of scenarios. The small eigenvalue is shown to diminish qualitatively and quantitatively for two arrival scenarios increasingly stressed with high temporal and/or spatial correlations. The special case of equal-strength signal arrivals also important in low angle radar tracking, shares many rich structures. The equal-strength case also has several additional unique features for signal eigenvalue ratio which is important in direction finding. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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