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Codebook generation method, device and system for multiple-input multiple-output system

A codebook and initial code technology, applied in the field of codebook generation, can solve the problem of increasing the storage space of the codebook at the receiving end, and achieve the effect of improving accuracy, improving accuracy and precoding performance

Active Publication Date: 2011-09-21
HUAWEI TECH CO LTD +1
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  • Abstract
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Problems solved by technology

However, the inventor found that when the above-mentioned dual codebook is used for precoding, since the receiver needs to pre-configure the dual codebook, on the one hand, the accuracy of the codebook is improved, but on the other hand, the codebook storage space at the receiver is also increased.

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  • Codebook generation method, device and system for multiple-input multiple-output system

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0038] An embodiment of the present invention provides a method for generating a codebook in a MIMO system. The two ends of the communication are configured with the same preset codebook set, such as figure 1 As shown, the method includes the following steps:

[0039] 101. Select an initial codebook from a preset codebook set. The initial codebook is used to perform initial precoding on the data stream.

[0040] 102. When the quality of the received signal is low...

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Abstract

The invention discloses a codebook generation method, a codebook generation device and a codebook generation system for a multiple-input multiple-output system, which relate to the technical field of wireless communication. The accuracy of a codebook and precoding performance are improved on the basis of not increasing a conventional codebook memory space of a receiver. The same preset codebook set is configured in two ends communicating with each other in the system. The method comprises the following steps of: obtaining an initial codebook; and when the quality of received signals is lower than preset quality, operating the initial codebook by utilizing a rotation factor and a rotation matrix to generate a new codebook, precoding a data stream by using the new codebook, and when the quality, estimated by utilizing the new codebook, of the signals meets the preset quality, transmitting the rotation factor to communication opposite-ends. The embodiment of the invention is mainly applied in the field of precoding codebook designing.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a method, device and system for generating a codebook in a MIMO system. Background technique [0002] At present, in a MIMO (Multiple-Input Multiple-Output, Multiple-Input Multiple-Output) system, a precoding technology based on a codebook is usually used to precode data at a sending end. The above-mentioned codebook-based precoding technology needs to pre-configure the same fixed codebook set at both the transmitting end and the receiving end. When data communication occurs, the receiving end first calculates the optimal optimal precoding matrix; and then select the codebook closest to the optimal precoding matrix in the fixed codebook set configured by it, and feed back the serial number of this codebook to the sending end. After receiving the serial number of the codebook, the sending end selects the codebook corresponding to the serial number in the configured fixed codeb...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04L1/06H04L1/00
Inventor 王勇郝东来吴涛
Owner HUAWEI TECH CO LTD
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