The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2026
Filed:
Sep. 09, 2020
Qualcomm Incorporated, San Diego, CA (US);
Liangming Wu, Beijing, CN;
Chenxi Hao, Beijing, CN;
Yu Zhang, San Diego, CA (US);
Kangqi Liu, San Diego, CA (US);
Min Huang, Beijing, CN;
Rui Hu, Beijing, CN;
Qiaoyu Li, Beijing, CN;
Chao Wei, Beijing, CN;
Hao Xu, Beijing, CN;
Wanshi Chen, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Port selection codebook enhancements are disclosed for spatial and frequency domain density (FDD) reciprocity. A base station may generate and signal a channel state information (CSI) report configuration including configuration of multiple CSI-reference signal (CSI-RS) port groups, wherein each group includes one or more CSI-RS ports, and each group is associated with one or more codebook subset restrictions (CBSRs). Using the configured restrictions of the CBSRs, served user equipments (UEs) may determine linear combination coefficient feedback based on channel measurements of selected port groups and signals the feedback to the base station. Once the base station receives the feedback it may then determine a hybrid CSI-RS codebook using both the configured CSI-RS port groups and the linear combination coefficients. The base station may then transmit downlink data encoded with a precoding matrix selected from the codebook. Other aspects and features are also claimed and described.