Electronic scanning radar apparatus, received wave direction estimating method, and received wave direction estimating program
US8648745B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 2011 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Aug 2, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/931
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic scanning radar apparatus in accordance with an embodiment of the present invention, a frequency resolving unit resolves beat signals into beat frequencies having a predetermined frequency bandwidth and calculates complex data based on the resolved beat signals for each beat frequency. An azimuth calculating unit estimates a number of received waves based on eigenvalues of a matrix being part of a primary normal equation having complex data as elements calculated from the beat signals, creates coefficients calculated as a solution of a secondary normal equation of a signal subspace created based on eigenvalues and eigenvectors corresponding to the number of the estimated waves, and calculates a DOA of a received wave based on the created coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.