US 11,082,099 B2 · Codebook sub-sampling for CSI feedback on PUCCH for 4TX MIMO

Abstract

Channel state information (CSI) feedback in a wireless communication system is disclosed. User equipment transmits a CSI feedback signal via a Physical Uplink Control Channel (PUCCH). If the UE is configured in a first feedback mode, the CSI comprises a first report jointly coding a Rank Indicator (RI) and a first precoding matrix indicator (PMI1), and a second report coding Channel Quality Indicator (CQI) and a second precoding matrix indicator (PMI2). If the UE is configured in a second feedback mode, the CSI comprises a first report coding RI, and a second report coding CQI, PMI1 and PMI2. The jointly coded RI and PMI1 employs codebook sub-sampling, and the jointly coding PMI1, PMI2 and CQI employs codebook sub-sampling.

Claims4

Dependent claims

A method comprising:

transmitting, by a user equipment, a channel state information (CSI) feedback signal having:
a first report jointly coding a Rank Indicator (RI) and a first precoding matrix indicator (PMI1) associated with the index of a first precoding matrix (W1), and a second report coding a Channel Quality Indicator (CQI) and a second precoding matrix indicator (PMI2) associated with the index of a second precoding matrix (W2), and
wherein jointly coding the RI and the PMI1 employs codebook sub-sampling as follows:
Value of joint encoding
Chosen W1 index
of RI and the first PMI
for sub-sampling
(IRI/PMI1)
RI
(i1)
0-7
1
IRI/PMI1
8-15
2
IRI/PMI1 − 8
16
3
0
17
4
0
18-31
reserved
NA.

22 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/716,210Filed 16 Dec 2019 · continuation

Priority

25 Feb 2013

Published

US 2020/0304181 A124 Sep 2020

Granted

3 Aug 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

H04B 7/0456
MIMO systems: selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
H04B 7/0486
Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting: taking channel rank into account
H04B 7/0487
Taking channel rank into account: codebooks having a nested structure
H04B 7/0626
Feedback content: channel coefficients, e.g. channel state information [CSI]

Family

Application61/768,857Us provisional application · filed 25 Feb 2013

Application61/815,081Us provisional application · filed 23 Apr 2013

Application61/823,663Us provisional application · filed 15 May 2013

Application61/826,137Us provisional application · filed 22 May 2013

Application61/828,072Us provisional application · filed 28 May 2013

Application14/187,216Parent of this division · filed 21 Feb 2014

Application14/831,698Parent of this continuation · filed 20 Aug 2015

Application15/222,452Parent of this continuation · filed 28 Jul 2016

Application15/853,430Parent of this continuation · filed 22 Dec 2017

US 2020/0304181 A1Pre-grant publication · published 24 Sep 2020

US 10,511,362 B2Parent of this continuation

US 9,853,703 B2Parent of this continuation

US 9,407,346 B2Parent of this continuation

US 9,143,212 B2Parent of this division

Application14/831,698Parent of this division

US 2014/0328422 A1Published application

US 2016/0028460 A1Published application

US 2016/0352399 A1Published application

US 2019/0074875 A1Published application

US 11,082,099 B2This patent

From the US filing history. Foreign family members aren’t listed.

Codebook sub-sampling for CSI feedback on PUCCH for 4TX MIMO

Life of this patent

Codebook sub-sampling for CSI feedback on PUCCH for 4TX MIMO

Life of this patent

Abstract

Claims4