Method for calibrating smart antenna array systems in real time
US7102569B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2005 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Jun 23, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/267
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Transmitting and receiving compensation coefficients of each antenna element relative to a calibration antenna element are obtained in the pre-calibration of a smart antenna. After the antenna array is installed, in transmitting calibration, amplitude and phase response of each transmitting link is computed according to the calibration signals received by the calibration link and, together with the transmitting compensation coefficient obtained in the pre-calibration, the compensation coefficient of each transmitting link is computed to compensate the downlink data of a base station. In receiving calibration, the amplitude and phase response of each receiving link is computed based on the signals received by the receiving links and, together with the receiving compensation coefficient obtained in pre-calibration, the compensation coefficient of each receiving link is computed to compensate the uplink data of the base station. The calibration signal of each antenna element is generated by a periodic cycling shift of a basic calibration sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.