Massive digital-analog hybrid antenna, channel state information feedback method and channel state information feedback device
US10447360B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2016 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Mar 1, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0057
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides a massive digital-analog hybrid antenna, a CSI feedback method and a CSI feedback device. The CSI feedback method includes: at an analog precoding matrix selection stage of an analog precoding period, transmitting, by a base station, a precoded downlink reference signal and receiving first-stage CSI and measurement information fed back by a UE on a subframe corresponding to each time offset; selecting, by the base station, a target analog precoding matrix in accordance with performance measurement values of analog precoding matrices corresponding to all P time offsets; and at a target analog precoding matrix using stage of the analog precoding period, transmitting, by the base station, the downlink reference signal precoded by the target analog precoding matrix and receive second-stage CSI fed back by the UE on each predetermined subframe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.