Codebook subsampling for multi-antenna transmit precoder codebook

Patent metadata

Field	Value
Publication number	US-9344167-B2
Application number	US-201414298358-A
Country	US
Kind code	B2
Filing date	Jun 6, 2014
Priority date	Jun 6, 2013
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

Embodiments provide approaches for sub-sampling a two-component precoder codebook to reduce the overhead associated with signaling the codebook in periodic Channel State Information (CSI) reports from a user equipment (UE) to a base station. In one embodiment, a first component of the codebook is sub-sampled to accommodate a payload capacity of a Physical Uplink Control Channel (PUCCH) CSI Report of Type 1. In another embodiment, both the first component and the second component of the codebook are sub-sampled to accommodate a maximum payload capacity associated with a PUCCH CSI report.

First claim

What is claimed is:

1. A User Equipment (UE), comprising:
processor circuitry configured to:
generate an estimate of a downlink channel from a base station;
select a precoder matrix, based on the estimate, from a first precoder codebook when the precoder matrix is for signaling on an aperiodic uplink resource; and
select a first component and a second component of the precoder matrix, based on the estimate, from a second precoder codebook when the precoder matrix is for signa…

Assignees

• Broadcom Corp

Inventors

• Gomadam Krishna
• Tujkovic Djordje

Classifications

• H04B7/0469

  Electricity · mapped topic

• H04B7/0617

  Electricity · mapped topic

• H04B7/0456 Primary

  Electricity · mapped topic

• H04B7/0647

  Electricity · mapped topic

• H04B7/063

  Electricity · mapped topic