Channel feedback method and device based on hybrid beamforming

A hybrid beam and channel feedback technology, applied in the field of channel feedback based on hybrid beamforming, can solve the problem of less research results, and achieve the effects of reducing the number of radio frequency channels, reducing feedback overhead, and improving system performance

Active Publication Date: 2017-06-13
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Research on hybrid beamforming methods in the prior art, especially the application of hybrid beamforming in frequency division duplex (FDD: Frequency DivisionDuplexing) massive MIMO systems is a research hotspot, but until now there are very few research results

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  • Channel feedback method and device based on hybrid beamforming
  • Channel feedback method and device based on hybrid beamforming
  • Channel feedback method and device based on hybrid beamforming

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Embodiment Construction

[0030] Embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The accompanying drawings show, by way of example only, specific embodiments in which the present disclosure can be implemented, and the illustrated embodiments are not intended to exhaust all embodiments according to the present disclosure. Those skilled in the art can obtain alternative implementations from the following description without departing from the spirit and protection scope of the embodiments of the present disclosure, and make structural or logical modifications. Accordingly, the following detailed description is not limiting, and the scope of embodiments of the present disclosure is defined by the appended claims. It should be noted that although the steps of the relevant methods in the embodiments of the present disclosure are described in a specific order in the drawings, this does not require or imply that these operations must be perfor...

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Abstract

The embodiment of the disclosure provides a channel feedback method and device based on hybrid beamforming. The method comprises the following steps: estimating a physical channel correlation matrix of a long-time broadband; feeding back the physical channel correlation matrix of the long-time broadband to a base station; estimating a short-time narrow-band equivalent channel after analog beamforming; and feeding back the short-time narrow-band equivalent channel to the base station based on an adaptive codebook. The embodiment of the disclosure also provides a corresponding channel feedback method and a corresponding device. According to the channel feedback solution based on hybrid beamforming provided by the embodiment of the disclosure, the feedback overhead can be significantly reduced, the number of RF channels in the system can be reduced, and the system performance which is better than a traditional pure digital beamforming scheme can be obtained with the same feedback overhead.

Description

technical field [0001] Embodiments of the present disclosure generally relate to the field of wireless communication, and in particular, relate to a channel feedback method and device based on hybrid beamforming. Background technique [0002] Massive input and output (MIMO: Multiple Input Multiple Output) or large-scale antenna systems have been recognized as a key applicability technology for 5G communication systems, which have great potential in terms of energy efficiency, spectrum efficiency, robustness, and reliability. Advantage. For massive MIMO systems using beamforming (BF: beamforming), theoretically, the application of traditional pure digital beamforming technology can obtain the best performance. However, traditional pure digital beamforming requires radio frequency (RF: Radio Frequency) The number of channels is the same as the number of antennas, which leads to an increase in hardware complexity and cost caused by the number of RF channels when the number of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0413H04B7/06
CPCH04B7/0413H04B7/0417H04B7/0617
Inventor 武露吴克颖
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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