Codebook feedback method, user equipment and base station

A technology of user equipment and base station, which is applied in the direction of space transmit diversity, diversity/multi-antenna system, etc., can solve problems such as limiting system performance, and achieve the effect of improving system performance

Active Publication Date: 2014-08-27
HUAWEI TECH CO LTD
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Problems solved by technology

The base station only generates beams based on the phase difference between the first antenna direction and the polarization direction, intelligently performs beam steering in two dimensions, which limits the improvement of system performance

Method used

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  • Codebook feedback method, user equipment and base station
  • Codebook feedback method, user equipment and base station
  • Codebook feedback method, user equipment and base station

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Embodiment Construction

[0048] 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 part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0049] It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems using AAS, such as: Global System of Mobile communication (Global System of Mobile communication, referred to as "GSM") system, Code Division Multiple Access (Code Division Multiple Access, “CDMA” for short) system, Wideband Code Division Multiple Access (WCDMA for short) system, General Packet ...

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Abstract

The embodiment of the invention provides a codebook feedback method, user equipment and a base station. The codebook feedback method comprises the following steps: a reference signal sent through an antenna array by the base station is measured; according to the measuring result, a precoding matrix is selected from a codebook; multiple codebook indexes corresponding to the precoding matrix are determined; and a precoding matrix indicator PMI corresponding to two of the multiple codebook indexes is determined, and the PMI is sent to the base station such that the base station sends the precoding matrix of data according to the PMI selection. According to the embodiment of the invention, the user equipment sends the PMI corresponding to the multiple codebook indexes to the base station, and the multiple codebook indexes are corresponding to a first parameter in a first antenna direction and a second parameter in a second antenna direction. The base station can utilize the first parameter and the second parameter to form spatial three-dimensional beams in the horizontal and vertical directions. Thus, system performance can be raised.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of wireless communication, and more specifically, relate to a codebook feedback method, user equipment and a base station. Background technique [0002] With the continuous growth of wireless data service requirements, the performance requirements of wireless communication systems are also getting higher and higher. The technology of improving system performance by using an Active Antenna System (AAS) with a two-dimensional antenna array structure has attracted much attention. In AAS technology, each antenna unit has its own communication unit and power control unit, which can independently control the signal amplitude and phase. In this way, the two-dimensional antenna array can dynamically steer beams in two dimensions, the first antenna direction and the second antenna direction. The antenna array is composed of multiple antennas, forming a two-dimensional plane with multiple rows ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
Inventor 高毓恺黎超
Owner HUAWEI TECH CO LTD
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