Channel state information feedback and receiving method and apparatus

A channel state information and channel measurement technology, applied in the field of communication, can solve problems such as low reliability and performance degradation of MIMO systems

Active Publication Date: 2017-11-07
DATANG MOBILE COMM EQUIP CO LTD
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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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  • Channel state information feedback and receiving method and apparatus
  • Channel state information feedback and receiving method and apparatus
  • Channel state information feedback and receiving method and apparatus

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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

The invention discloses a channel state information feedback and receiving method and apparatus for solving the problem of low reliability of the existing MIMO feedback scheme when the UE speed is high. The method comprises the following steps: a terminal performs beam forming on I pre-encoding units in at least one time-frequency resource by using different pre-encoding matrixes in a pre-encoding matrix group corresponding to a beam forming mode according to the determined beam forming mode, wherein the time-frequency resource is divided into I pre-encoding units, the beam forming mode characterizes the mapping relationship between the I pre-encoding units in the time-frequency resource and the pre-encoding matrixes in the pre-encoding matrix group corresponding to the beam forming mode, and I is an integer greater than 1; and terminal performs channel measurement on the time-frequency resource subjected to the beam forming 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 Applications(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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