18393965. CODEBOOK SUB-SAMPLING FOR CSI FEEDBACK ON PUCCH FOR 4TX MIMO simplified abstract (TEXAS INSTRUMENTS INCORPORATED)

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CODEBOOK SUB-SAMPLING FOR CSI FEEDBACK ON PUCCH FOR 4TX MIMO

Organization Name

TEXAS INSTRUMENTS INCORPORATED

Inventor(s)

Runhua Chen of Plano TX (US)

Eko Onggosanusi of Allen TX (US)

Ralf M. Bendlin of Portland OR (US)

CODEBOOK SUB-SAMPLING FOR CSI FEEDBACK ON PUCCH FOR 4TX MIMO - A simplified explanation of the abstract

This abstract first appeared for US patent application 18393965 titled 'CODEBOOK SUB-SAMPLING FOR CSI FEEDBACK ON PUCCH FOR 4TX MIMO

The abstract of the patent application describes a method for Channel State Information (CSI) feedback in a wireless communication system. User equipment transmits CSI feedback signals via a Physical Uplink Control Channel (PUCCH) in different feedback modes.

  • Key Features and Innovation:
  • User equipment transmits CSI feedback signals via PUCCH.
  • Two feedback modes are defined based on the type of information coded in the reports.
  • In the first feedback mode, the CSI includes a report jointly coding Rank Indicator (RI) and Precoding Matrix Indicator 1 (PMI1), and a second report coding Channel Quality Indicator (CQI) and Precoding Matrix Indicator 2 (PMI2).
  • In the second feedback mode, the CSI includes a report coding RI, and a second report coding CQI, PMI1, and PMI2.
  • Codebook sub-sampling is employed for jointly coding RI and PMI1, and for coding PMI1, PMI2, and CQI.

Potential Applications: This technology can be applied in various wireless communication systems to improve the efficiency of CSI feedback.

Problems Solved: This technology addresses the need for efficient coding and transmission of CSI feedback in wireless communication systems.

Benefits:

  • Improved efficiency in transmitting CSI feedback.
  • Enhanced performance of wireless communication systems.
  • Better utilization of resources in the communication network.

Commercial Applications: This technology can be utilized in 5G and beyond wireless communication systems, improving the overall performance and efficiency of the network.

Questions about Channel State Information (CSI): 1. How does the use of different feedback modes improve the efficiency of CSI feedback in wireless communication systems? 2. What are the potential implications of codebook sub-sampling in jointly coding RI and PMI1, and in coding PMI1, PMI2, and CQI?


Original Abstract Submitted

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.

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