Method and device for generating precoding codebook

A precoding and codebook technology, applied in baseband systems, shaping networks in transmitters/receivers, digital transmission systems, etc., can solve problems such as low channel quantization accuracy and less channel information, and achieve improved quantization accuracy and enhanced Channel information, the effect of optimization generation technology

Inactive Publication Date: 2017-11-21
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above feedback method is the channel quality that the UE can achieve when the base station is assumed to transmit with a specific codebook, rather than the complete information of the original channel, which reduces the feedback overhead. However, the feedback channel information is less, and the quantization accuracy of the channel is relatively low. Low

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  • Method and device for generating precoding codebook
  • Method and device for generating precoding codebook
  • Method and device for generating precoding codebook

Examples

Experimental program
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Embodiment 1

[0068] figure 1 A flow chart of the method for generating a precoding codebook provided in Embodiment 1 of the present invention is given. The method in this embodiment can be executed by a device for generating a precoding codebook, which can be implemented by means of hardware and / or software. The above device can be set inside the user end as a part of the user end UE.

[0069] Such as figure 1 As shown, the precoding codebook generation method provided in this embodiment specifically includes the following steps:

[0070] Step 101. Obtain a long-term codebook and a short-term codebook, and generate an intermediate precoding codebook according to the long-term codebook and the short-term codebook.

[0071] Specifically, in the first case, the long-term codebook W 1 and short-term codebook W 2 can be of the following form, respectively, X=[b 1 ,b 2 ,...,b N ] is the beam group, N is the number of beams, for beam selection (by e k Realize) and the phase adjustment...

Embodiment 2

[0080] figure 2 A flow chart of the method for generating a precoding codebook provided by Embodiment 2 of the present invention is given. This embodiment is optimized on the basis of the first embodiment above. In this embodiment, the generation of the adjusted codebook according to the set generation rule is optimized as: generating the adjusted codebook according to the set generation rule according to the intermediate precoding codebook. Further, the long-term codebook W 1 and short-term codebook W 2 Select the first case in Embodiment 1.

[0081] Correspondingly, the method provided in this embodiment includes the following steps:

[0082] Step 201. Obtain the long-term codebook W 1 and short-term codebook W 2 , generate an intermediate precoding codebook W according to the long-term codebook and short-term codebook s1 .

[0083] in, X=[b 1 ,b 2 ,...,b N ] is the beam group, N is the number of beams, Since current base station antennas are generally dual-p...

Embodiment 3

[0112] This embodiment is optimized on the basis of the above embodiments. The difference from Embodiment 2 is that the long-term codebook W in this embodiment 1 and short-term codebook W 2 Select the second case in the first embodiment. In this embodiment, the target precoding codebook is constructed for one polarization direction of the dual-polarization antenna of the base station. Adjusting the intermediate precoding codebook according to the adjustment codebook to generate a target precoding codebook is optimized as follows: adjusting the intermediate precoding codebook according to the phase rotation factor and the adjustment codebook, so as to Generate the target precoding codebook.

[0113] Correspondingly, such as Figure 4 As shown, the method provided in this embodiment includes the following steps:

[0114] Step 301. Obtain the long-term codebook W 1 and short-term codebook W 2 , generate an intermediate precoding codebook W according to the long-term codeboo...

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Abstract

Embodiments of the invention disclose a method and device for generating a precoding codebook. The method includes the steps of acquiring a long-term codebook and a short-term codebook, and generating an intermediate precoding codebook according to the long-term codebook and the short-term codebook; generating an adjustment codebook according to a set generation rule; and adjusting, according to the adjustment codebook, the intermediate precoding codebook to generate a target precoding codebook. The technical scheme provided by the embodiments of the invention enhances channel information fed back by UE to a base station, optimizes the existing precoding codebook generation technology and improves the quantization accuracy of the channel.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of wireless communication, and in particular, to a method and device for generating a precoding codebook. Background technique [0002] At present, in order to pursue a higher data transmission rate in the communication system, a large number of antennas will be configured in hotspot scenarios. When the number of antennas increases, the data transmission rate depends on the transmitter’s perception of the channel. The acquisition of channel information depends on the channel information feedback at the receiving end, which means that the more accurate the channel information feedback, the greater the feedback overhead will be. In order to reduce the feedback overhead, the existing LTE-Advanced (Long Term Evolution-Advanced, Long-term evolution technology upgrade version) adopts the form of dual codebooks for feedback, UE (User Equipment, user end) needs to feed back long-term codebook W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03
CPCH04L25/03942H04L25/03898
Inventor 董付现孙鹏
Owner BEIJING XINWEI TELECOM TECH
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