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MIMO codebook indicator feedback method and corresponding device

A codebook indication and feedback module technology, applied in the field of communication, can solve the problems of large amount of feedback and reduce the transmission quality of feedback signaling, and achieve the effect of reducing the number of bytes, saving feedback overhead, and improving feedback quality

Active Publication Date: 2012-08-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the codebook indication feedback of high-order MIMO with more than 4 transmission layers, the UE needs to report all i1 and i2 to the base station, and the amount of feedback is large, thereby reducing the transmission quality of the feedback signaling

Method used

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  • MIMO codebook indicator feedback method and corresponding device
  • MIMO codebook indicator feedback method and corresponding device
  • MIMO codebook indicator feedback method and corresponding device

Examples

Experimental program
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Embodiment 1

[0026] Based on the analysis of the characteristics of the first codebook indication and the second codebook indication in the case of 8 antennas in the LTE-A system, the embodiment of the present invention proposes a MIMO codebook indication feedback method, see figure 1 , the method includes:

[0027] 101: Obtain a first codebook indication and a second codebook indication;

[0028] 102: If the number of transmission layers is less than or equal to the preset number of layers, feed back the first codebook indication and the second codebook indication;

[0029] 103: If the number of transmission layers is greater than the preset number of layers, only the first codebook indication is fed back.

[0030] In the method provided by the embodiment of the present invention, when the number of transmission layers is greater than the preset number of layers, only the first codebook indication is fed back, and the second codebook indication is not fed back, which saves the number of ...

Embodiment 2

[0033] The embodiment of the present invention takes the aperiodic mode 1-2 as an example. In this mode, see figure 2 , the MIMO codebook indication feedback method described in the embodiment of the present invention includes:

[0034] 201: Obtain the first codebook indication of all subband sets and the second codebook indication of each subband;

[0035] Specifically, for all subband sets S for data transmission, the first codebook indication is selected from the precoded codebook subset. For each transmitted subband, a second codebook indication corresponding to the subband is selected from the precoded codebook subset.

[0036] 202: If the number of transmission layers is less than or equal to the preset number of layers, feed back the first codebook indication and the second codebook indication;

[0037] Preferably, in this embodiment, the preset number of layers is 4, that is, when the number of transmission layers is less than or equal to 4, the obtained codebook in...

Embodiment 3

[0046]The embodiment of the present invention takes the aperiodic mode 3-1, mode 1 and mode 2 in the periodic mode 1-1, and the periodic mode 2-1 as examples. In these modes, see image 3 , the MIMO codebook indication feedback method described in the embodiment of the present invention includes:

[0047] 301: Obtain the first codebook indication and the second codebook indication of all subband sets;

[0048] Specifically, for all subband sets S for data transmission, the first codebook indication and the second codebook indication are selected from the precoded codebook subset.

[0049] 302: If the number of transmission layers is less than or equal to the preset number of layers, feed back the first codebook indication and the second codebook indication;

[0050] Preferably, in this embodiment, the preset number of layers is 4, that is, when the number of transmission layers is less than or equal to 4, the obtained codebook indication is directly fed back to the base stati...

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Abstract

The invention discloses an MIMO (Multiple Input Multiple Output) codebook indicator feedback method and a corresponding device, which belong to the communication field. The method comprises the following steps: obtaining a first codebook indicator and a second codebook indicator; and feeding back both if the number of the transmission layers is less than or equal to that of pre-arranged layers, otherwise, feeding back only the first codebook indicator. The device comprises an acquisition module and a feedback module. According to the invention, only the first codebook indicator is fed back, if the number of the transmission layers is larger than that of the pre-arranged layers, so that the byte numbers for feeding back the second codebook indicator are saved, which allows the byte numbers for feeding back the codebook indicators to be greatly reduced under the condition that the number of the transmission layers is larger than that of the pre-arranged layers, and the feedback quality is improved at effectively reduced feedback expense.

Description

technical field [0001] The invention relates to the communication field, in particular to a MIMO codebook indication feedback method and device. Background technique [0002] MIMO (Multiple Input and Multiple Output) technology refers to using multiple transmitting antennas and receiving antennas at the transmitting end and receiving end respectively, and signals are transmitted and received through multiple antennas at the transmitting end and receiving end, thereby improving data transfer rate. Among various multi-antenna technologies, the closed-loop precoding technology can obtain a large signal-to-noise ratio gain and diversity gain, so it has been widely used. In a closed-loop precoding system, the receiving end generally feeds back the RI (Rank Indicator) and PMI (Precoding Matrix Index) of the channel to the transmitting end, so that the transmitting end can configure the precoding of the downlink transmission data Matrix and code rate. [0003] The new generation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16
Inventor 李元杰
Owner HUAWEI TECH CO LTD
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