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Channel state information feedback method and device, and terminal and base station

A channel state information and base station technology, applied in the field of wireless communication, can solve the problems of high power consumption, etc., and achieve the effects of reducing power loss, ensuring accuracy, and ensuring accuracy

Active Publication Date: 2016-11-23
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology

[0026] The technical problem to be solved by the present invention is to provide a method, device, terminal and base station for channel state information feedback, which are used to solve the problem that in the TD-LTE system, the existing antenna CQI feedback method consumes a lot of power and is not suitable for terminals. There is a problem with a single transmit antenna in

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  • Channel state information feedback method and device, and terminal and base station
  • Channel state information feedback method and device, and terminal and base station
  • Channel state information feedback method and device, and terminal and base station

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Embodiment Construction

[0086] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0087] In the TD-LTE system, the present invention aims at the problem that the existing antenna CQI feedback method consumes a lot of power and is not applicable to the problem that there is a single transmitting antenna in the terminal, such as figure 2 As shown, a method for channel state information feedback is provided, including:

[0088] Step 10, obtaining the reference information sent by the base station;

[0089] Step 20, according to the reference information, obtain the channel transmission matrix between the channel sounding reference signal SRS transmitting antenna of the terminal and the port corresponding to the reference information of the base station;

[0090] Step 30, according to the channel transmission matrix, obtain the cha...

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Abstract

The invention provides a channel state information feedback method and device, and a terminal and a base station. The channel state information feedback method comprises the steps of obtaining reference information sent by the base station; obtaining a channel transmission matrix between a channel sounding reference signal SRS sending antenna of the terminal and a port corresponding to the reference information of the base station according to the reference information; obtaining a channel quality indicator CQI of the SRS sending antenna according to the channel transmission matrix when the base station is in a maximum ratio combined transmission mode; and sending the feedback information to the base station, wherein the feedback information at least comprises the CQI. According to the scheme of the method, the device, the terminal and the base station, more ports of the base station can be supported; moreover, the CQI fed back by the terminal corresponds to the antenna supporting SRS sending at the terminal side; and through adoption of the feedback mode, the power loss is reduced, and the feedback accuracy of the CQI is improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method, device, terminal and base station for channel state information feedback. Background technique [0002] In the existing TD-LTE (Time Division-Long Term Evolution) system, the transmission mode based on channel reciprocity can be selected based on the configuration of the network side when performing channel state information feedback. Channel state information feedback and channel state information feedback based on PMI (Pre-codingMatrix Indicator, precoding matrix indication): [0003] For the channel state information feedback mode based on transmit diversity, the specific process is as follows: 1) eNB (Evolved Node B, namely evolved Node B, referred to as eNB, the name of the base station in LTE) transmits a reference signal CRS (Common Reference Signal) or CSI- RS (Channel State Information Reference Signal, channel state information reference signal...

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Application Information

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IPC IPC(8): H04L1/00H04L1/16
CPCH04L1/00H04W28/18Y02D30/70
Inventor 王飞童辉侯雪颖金婧
Owner CHINA MOBILE COMM GRP CO LTD
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