Uplink precoding emitting method and device

A technology of precoding and precoding matrix, which is applied in the field of uplink precoding transmission methods and devices, and can solve the problems of not matching channels well and not making full use of TDD channel reciprocity, etc.

Active Publication Date: 2013-02-13
盐城新汇村镇建设发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inevitable quantization error in the process of codebook quantization, and the codebook can only be searched in a limited space, it cannot match the channel well.
Therefore, the uplink precoding transmission process in the prior art does not make full use of the TDD channel reciprocity feature

Method used

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  • Uplink precoding emitting method and device
  • Uplink precoding emitting method and device

Examples

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Embodiment Construction

[0091] The uplink precoding transmission method provided in this embodiment adopts the following technical solutions:

[0092] Step 1, UE reports PMI and other related information to eNode B;

[0093] Step 2, the eNode B notifies the UE that the autonomous uplink precoding mode can be adopted;

[0094] In the autonomous uplink precoding mode, the UE can use the uplink precoding matrix corresponding to the PMI sent by the base station to perform uplink precoding;

[0095] Or, the UE adds a correction amount to the uplink precoding matrix corresponding to the PMI issued by the base station, and uses the corrected PMI to perform uplink precoding;

[0096] Alternatively, the UE performs uplink precoding using the uplink precoding matrix corresponding to the independently calculated PMI;

[0097] Alternatively, the UE may also perform uplink precoding in a non-codebook manner.

[0098] In step 3, the eNode B sends a control signaling to the UE, notifying the UE to adopt the auto...

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Abstract

The invention discloses an uplink precoding emitting method and device. When a base station judges that UE (User Equipment) is allowed to automatically up precode, and informs the UE of carrying out uplink precoding emission by adopting an automatic uplink precoding mode. By adopting the invention, the UE can automatically carry out uplink precoding emission, the problem that a codebook selected by an eNode B can not be matched with a channel when uplink sending is carried by adopting a precoding matrix sent by an eNode B simply in the traditional uplink is overcome, therefore, the channel can be well matched, the emission property of an uplink is improved, and system packet error rate is lowered; and if a non-codebook precoding method is adopted, quantization errors of the codebook can be further overcome, the channel is accurately matched, and the property of the uplink is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an uplink precoding transmission method and device. Background technique [0002] MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) precoding technology is divided into codebook-based precoding and non-codebook precoding. [0003] The codebook-based precoding technology means that both the sending end and the receiving end know the same quantized codebook in advance, and the system selects an appropriate precoding matrix from the codebook according to certain criteria to precode the sending user. The advantage of the codebook-based precoding technology is that the amount of feedback information is small, but the disadvantage is that the codebook elements are limited and there are quantization errors. [0004] The non-codebook precoding technology refers to that the transmitting end or the receiving end calculates the precoding matrix in real ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00H04B7/06
Inventor 莫林梅赵亚军毕存磊孙云锋
Owner 盐城新汇村镇建设发展有限公司
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