Coefficient indication for channel state information

A technology for channel state information and coefficients, applied in transmission systems, radio transmission systems, electrical components, etc., to solve problems such as high delays and reduced efficiency of wireless devices

Pending Publication Date: 2021-09-21
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the amount of feedback increases, the overhead of providing feedback can result in inefficiencies or excessive delays in the communication of wireless devices

Method used

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  • Coefficient indication for channel state information
  • Coefficient indication for channel state information
  • Coefficient indication for channel state information

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0052] In some wireless communication systems (e.g., multiple-input multiple-output (MIMO) or multi-user MIMO (MU-MIM) systems), a user equipment (UE) may report to a base station the Channel state information feedback. The frequency domain of a DFT beam may span a bandwidth part (BWP), which may include one or more subbands depending on the granularity configured at the UE or base station. Based on channel state information feedback, the base station can construct a precoding matrix and can precode transmissions on multiple DFT beams. In some cases, the UE may report the base subset selection for the set of beams, and the base station may use the basis vectors to determine the precoding matrix (e.g., a precoder selected from a linearly combined codebook) for communication with the UE . In order to reduce reporting overhead, the UE may report a set of cross-layer coefficients, where the cross-layer coefficients may be used to indicate common precoding coefficients across mul...

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Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform channel state information measurements on reference signal transmissions from a base station. The UE may identify a set of cross layer coefficients associated with a set of spatial layers based on the channel state information measurements. The UE may additionally identify a set of precoding coefficients associated with a spatial layer from the set of spatial layers. In some implementations, the set of precoding coefficients may be based on the set of cross layer coefficients. In some examples, the UE may transmit the set of cross layer coefficients and the set of precoding coefficients to the base station.

Description

technical field [0001] The following relates generally to wireless communications, and more specifically to coefficient indications of channel state information. Background technique [0002] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be able to support communication with multiple users by sharing available system resources (eg, time, frequency, and power). Examples of such multiple-access systems include fourth-generation (4G) systems, such as Long-Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth-generation (5G) systems (which may be referred to as the New Radio (NR) system). These systems can employ techniques such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA)...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04B7/00
CPCH04B7/0417H04B7/0663H04B7/0645H04B7/0639H04B7/063H04B7/0634H04B7/0626
Inventor武良明魏超李乔羽郝辰曦徐浩
OwnerQUALCOMM INC