Wave arrival direction estimating method and antenna apparatus having wave arrival direction estimating function
US6377213B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1999 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Dec 28, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q25/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for estimating an arrival direction of an electromagnetic wave by the BS-MUSIC, by inputting into one receiver arrival wave reception signals received by a plurality of antenna elements constituting an array antenna. At first, a wide range is scanned in a plurality of directions with a wide antenna beam and a first estimation of arrival direction is carried out. Next, a plurality of directions are scanned with a narrow antenna beam to cover only the directions obtained as a result of the first estimation of arrival direction. Thus, a second estimation of arrival direction is carried out. With this arrangement, it is possible to provide a method of estimating an arrival direction by using a small number of receivers in a small apparatus at low cost. Further, based on this method, it is also possible to estimate an arrival direction in a small calculation volume even under the unknown environment of waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.