公开(公告)号：US20160028460A1

公开(公告)日：2016-01-28

申请号：US14831698

申请日：2015-08-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： RUNHUA CHEN ,  EKO NUGROHO ONGGOSANUSI ,  RALF MATTHIAS BENDLIN

IPC: H04B7/04 ,  H04L5/00 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/065 ,  H04L5/0057 ,  H04W36/0083 ,  H04W72/0413

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.

公开(公告)号：US20180176790A1

公开(公告)日：2018-06-21

申请号：US15888928

申请日：2018-02-05

Applicant: Texas Instruments Incorporated

Inventor： RALF MATTHIAS BENDLIN ,  ANTHONY EDET EKPENYONG ,  PIERRE BERTRAND ,  BRIAN F. JOHNSON

IPC: H04W16/14 ,  H04W74/08 ,  H04W72/08 ,  H04W72/04 ,  H04W36/00

CPC classification number: H04W16/14 ,  H04W36/0055 ,  H04W36/0069 ,  H04W72/0413 ,  H04W72/082 ,  H04W74/0816

Abstract: A method of operating a long term evolution (LTE) communication system on a shared frequency spectrum is disclosed. A user equipment (UE) is initialized on an LTE frequency band. A base station (eNB) monitors the shared frequency spectrum to determine if it is BUSY. The eNB transmits to the UE on the shared frequency spectrum if it is not BUSY. The eNB waits for a first time if it is BUSY and directs the UE to vacate the shared frequency spectrum after the first time.