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Method and device for feedback and reception of channel state information

A technology for channel state information and channel measurement, which is applied in the directions of transmission path sub-channel allocation, signaling allocation, diversity/multi-antenna systems, etc., and can solve the problems of performance degradation and low reliability of MIMO systems.

Active Publication Date: 2020-03-24
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Embodiments of the present invention provide a channel state information feedback and data transmission method and device, which are used to solve the problem that the reliability of the existing MIMO feedback scheme is not high when the UE speed is high, and there are time gaps between the feedback time and the data transmission time. Delay, which leads to the problem of performance degradation of the MIMO system

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  • Method and device for feedback and reception of channel state information
  • Method and device for feedback and reception of channel state information
  • Method and device for feedback and reception of channel state information

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Embodiment Construction

[0116] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0117] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the embodiments described here are only used to illustrate and explain the present invention, not to limit the present invention.

[0118] The embodiment of the present invention pro...

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Abstract

Disclosed in the present application are a channel state information feedback and reception method and apparatus, for use in resolving the problem of low stability of existing MIMO feedback solutions when the speed of a UE is high. The method comprises: according to a determined shaping mode, a terminal performs shaping on I precoding units in at least one time-frequency resource by using different precoding matrices in a precoding matrix set corresponding to the shaping mode, the time-frequency resource being divided into I precoding units, the shaping mode indicating a mapping relationship between the I precoding units in the time-frequency resource and the precoding matrices in the precoding matrix set corresponding to the shaping mode, and I being an integer greater than 1; and the terminal performs channel measurement on the shaped time-frequency resource to obtain CQI corresponding to the time-frequency resource, and feeds back the CQI corresponding to the time-frequency resource.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a channel state information feedback and receiving method and device. Background technique [0002] In a multi-antenna system, the base station (eNB) side needs reliable (Channel State Information, CSI for short) channel information for processing such as data scheduling and signaling transmission. CSI is obtained by user equipment (UE) through downlink pilot signal measurement, and is notified to eNB through feedback. Assuming that a Multiple Input Multiple Output (MIMO for short) system includes Nt transmission antennas and Nr reception antennas, the MIMO signal is a complex matrix of Nt×Nr. In an actual communication system, the UE does not feed back Nt×Nr pieces of complex information to the eNB side to implement CSI feedback. Most of the MIMO feedback shaping technologies are based on the implicit (implicit) feedback scheme. The system predefines a set of possible p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04L5/00
CPCH04B7/0632H04B7/0639H04L5/0057H04B7/06H04L5/00
Inventor 陈润华陈文洪高秋彬李辉拉盖施
Owner DATANG MOBILE COMM EQUIP CO LTD
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