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Information feedback method and apparatus, and terminal

A feedback device and feedback volume technology, applied in the communication field, can solve problems such as increased feedback overhead, coarse fineness, and difficulty in supporting a large number of codebook feedbacks

Active Publication Date: 2017-03-01
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When reporting periodically, the CSI cannot exceed 11 bits, and the fineness of CSI reporting is coarse
[0008] The periodic feedback method of the current LTE system only considers the 8-antenna codebook in its design
Compared with the current 8-antenna codebook, the number of 3DMIMO codebooks has increased significantly. When the UE reports channel state information (CSI), the feedback overhead increases, and the existing feedback mode is difficult to support a larger number of codebook feedback.
For the feedback method design of 3D MIMO codebook, there is no related scheme at present

Method used

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  • Information feedback method and apparatus, and terminal
  • Information feedback method and apparatus, and terminal
  • Information feedback method and apparatus, and terminal

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0105] Such as Figure 5 As shown, the embodiment of the present invention provides an information feedback method, including:

[0106] Step 51, obtaining precoding matrix indication information of a multi-level precoding matrix of a precoding matrix used for downlink data transmission;

[0107] Step 52: Feed back the precoding matrix indication information of each level of precoding matrix to the base station separately or jointly encode and feed back to the base station.

[0108] In this embodiment, the precoding matrix W used for downlink data transmission is obtained by computing multi-level precoding matrices W1, W2, . . . , WN. For the design of the codebook of the 3D MIMO antenna array, there are many schemes. For example, when it is obtained by two-stage precoding matrix operation, W=W1×W2, W is the precoding matrix, W1 is the first-stage precoding matrix, W2 is The second level precoding matrix;

[0109] in,

[0110]

[0111] Represents the K-th dimension pre...

no. 2 example

[0120] Such as Figure 6 As shown, an information feedback method includes:

[0121] Step 61, obtaining the dimensions of the first-level precoding matrix of the precoding matrix used for downlink data transmission;

[0122] Step 62: Obtain precoding matrix indication information of the first-level precoding matrix according to the dimensions of the first-level precoding matrix;

[0123] Step 63: Obtain precoding matrix indication information of the second-level precoding matrix to the Nth-level precoding matrix of the precoding matrix; wherein, the second-level precoding matrix to the Nth-level precoding matrix are respectively based on their The precoding matrix of the previous level is obtained, and N is an integer greater than 2;

[0124] In step 64, the precoding matrix indication information of each level of precoding matrix is ​​fed back to the base station respectively or fed back to the base station after joint coding.

[0125] Such as Figure 7 As shown, in this ...

no. 3 example

[0135] Such as Figure 8 As shown, an information feedback method includes:

[0136] Step 811, obtain the first precoding matrix indication information PMI1 of the first-level precoding matrix; or step 812, obtain the indication information H-PMI1 of the horizontal dimension precoding matrix of the first-level precoding matrix and the vertical dimension Precoding matrix indication information V-PMI1;

[0137] Step 82, obtain the precoding matrix indication information of the second-level precoding matrix to the Nth-level precoding matrix of the precoding matrix; wherein, the second-level precoding matrix to the Nth-level precoding matrix are respectively according to their The precoding matrix of the previous level is obtained, and N is an integer greater than 2;

[0138] Step 831, independently feed back the rank information RI used for determining the precoding matrix to the base station; or

[0139] Step 832, feeding back the channel quality information CQI used for dete...

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Abstract

The invention provides an information feedback method and apparatus, and a terminal, and relates to the field of communication. The feedback information includes: obtaining pre-coding matrix indication information of multi-level pre-coding matrixes of a pre-coding matrix used for downlink data transmission; and respectively feeding back the pre-coding matrix indication information of each level of the pre-coding matrix to a base station or feeding back the information to the base station after combined coding. According to the scheme, higher requirement of codebook feedback loads can be met.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to an information feedback method, device and terminal. Background technique [0002] With the rapid development of the mobile Internet, business data traffic has increased dramatically, which has brought great adjustment pressure to existing wireless networks. For the current mainstream communication system (LTE, Long Term Evolution, Long Term Evolution), increasing system capacity and reducing interference are still the most important development goals. [0003] Such as figure 1 and figure 2 As shown, the current 2D MIMO (Multiple-Input Multiple-Output) smart antenna with controllable horizontal dimension uses multiple transmitting antennas and receiving antennas at the transmitting end and receiving end respectively, mainly utilizing the spatial freedom in the horizontal direction degree to obtain multi-antenna gain. in, figure 1 A dual-polarized antenna arran...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04L1/06
CPCH04B7/0619H04B7/0636H04L1/0625H04B7/06H04L1/06H04B7/0456H04B7/063H04B7/0632H04B7/0639H04B7/0478H04B7/0479H04B7/0413H04B7/0473
Inventor 李辉高秋彬陈润华陈文洪塔玛拉卡·拉盖施
Owner DATANG MOBILE COMM EQUIP CO LTD