Patent · US Active

Enhanced CSI feedback for FD-MIMO

US10826577B2 · kind B2 · utility

3Cited by

1References

14Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

Chao WEI · Beijing, CN
Wanshi Chen · San Diego, US
Peter Gaal · San Diego, US
Yu Zhang · Beijing, CN

Key dates

Filing date	Jan 19, 2015
Grant date	Nov 3, 2020
Priority date	—
Expiry date	Jan 27, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH04B7/2628
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

Enhanced channel state information (CSI) feedback is disclosed for full dimensional multiple input, multiple output (FD-MIMO) operations. In one aspect, a single CSI process is defined that is configured with an azimuth and elevation CSI-reference signal (RS) ports. A user equipment (UE) will send a precoding matrix indictor (PMI) report including a precoding matrix indicator (PMI) for the azimuth ports and a PMI for the elevation ports. One of the PMIs is assigned a low rank. The base station will use the two PMIs to create a whole channel precoding matrix. In another aspect, a single CSI process is configured having a plurality of CSI-RS resources. The UE generates channel measurement information for each of the CSI-RS resources, but only sets a CSI report to the base station of a subset of the total number of resources.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.