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Channel quality index feedback method and receiver

A channel quality and receiver technology, applied in the field of communication, can solve the problem of low utilization rate of resource blocks, achieve the effect of improving utilization rate and system performance

Inactive Publication Date: 2013-05-08
ZTE CORP
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Problems solved by technology

[0007] Considering that in the prior art, resource blocks with large differences in CQI values ​​may be allocated to one subband for feedback, resulting in low utilization of resource blocks, the present invention is proposed. Therefore, the main purpose of the present invention is to provide a A kind of channel quality index feedback method and receiver, to solve the above-mentioned problems existing in related technologies

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  • Channel quality index feedback method and receiver

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[0026] Functional Overview

[0027] Considering the correlation characteristics of each subcarrier in the channel correlation technology, that is, within the relevant bandwidth, the channel response does not change much, so the channel quality index (CQI) may have similar values ​​on adjacent resource blocks. The feedback algorithm is to divide consecutive resource blocks in order to form subbands, and then perform feedback according to the CQI of the subbands. However, if the CQI values ​​on adjacent resource blocks are quite different, and they are divided into one subband for scheduling, the resource blocks with better performance will not be able to exert their advantages, resulting in the utilization of resource blocks. low rate problem.

[0028] The present invention improves the above feedback method, so that the continuous resource blocks with close CQI values ​​are fed back, and the continuous resource blocks in the entire bandwidth can be accurately represented by a...

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Abstract

A channel quality indication (CQI) feedback method and receiver are provided. The method includes that the receiver feeds back positions and an average value of CQI of continuous resource blocks of a whole frequency band to a transmitter. The continuous resource blocks are adjacent resource blocks that the difference value of their CQI is less than or equal to a predetermined value.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to a channel quality index feedback method and receiver. Background technique [0002] In the related art, a channel quality index (Channel Quality Indication, CQI for short) is channel condition information fed back by a receiver to a transmitter in a communication system. After the transmitter receives the CQI fed back by the receiver, the transmitter corresponds the CQI information fed back by the receiver to a certain transport block size, coding mode, and modulation mode, and on this basis, allocates resources for the receiver according to the CQI information. Allocating and Scheduling. The real degree of the channel that can be reflected by the CQI information and the uplink overhead consumed by the feedback will have a greater impact on the system performance. [0003] In practical applications, the authenticity of the channel reflected by the CQI information and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L1/00
CPCH04L1/0026H04L1/0029
Inventor 彭爱华赵楠朱常青梁枫李峰王斌
Owner ZTE CORP