Method and receiving terminal for real-time adaptive antenna calibration with training signal cancellation
US11431423B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2017 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | Sep 25, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03949
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided for calibrating an antenna array in a receiver. A training signal for calibrating the antenna array is injected into a data signal received on each receive path to generate combined signals on each receive path. The combined signals are equalized by respective equalizers. The coefficients of the equalizers are determined by comparing a feedback signal for each receive path with the equalized signal to estimate the impairment on each received path. The estimated impairment on each receive path is used to adapt the equalize coefficients for a respective equalizer to compensate for the impairment. After equalization, an estimate of the observed training signal on each receive path is subtracted from the equalized signal for the same receive path to generate estimates of the received data signals for demodulation and decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.