Apparatus and method for estimating direction of radio frequency signal
US9709657B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2014 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Dec 10, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for estimating a direction of an RF signal are provided. The apparatus includes an antenna unit, a preliminary correction unit, a signal processing unit, a conversion unit, and a signal direction estimation unit. The antenna unit receives an RF signal from at least one antenna. The preliminary correction unit performs preliminary correction depending on whether the at least one antenna is an antenna having directional gain. The signal processing unit generates an analog signal by performing a frequency shift on the RF signal or a signal on which the preliminary correction has been performed. The conversion unit converts the analog signal into a digital sample. The signal direction estimation unit extracts the phase of the antenna from the digital sample, and estimates the direction of the RF signal based on the extracted phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.