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Hierarchical beam searching method under multipath channel

A beam and channel technology, applied in the field of hierarchical beam search, can solve problems such as non-optimal communication beams, and achieve the effect of low search complexity

Active Publication Date: 2016-10-12
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
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Problems solved by technology

However, the actual communication environment is mostly multi-path channels. If these beam search algorithms are in a multi-path environment, it is very likely that they will not find the optimal communication beam. Therefore, these beam search algorithms have great limitations.

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Embodiment Construction

[0026] The technical solution will be described in detail below in conjunction with the accompanying drawings.

[0027] The example of the present invention provides a diversity beam search method under the multi-path channel based on the analog beam forming technology.

[0028] Can overcome such as by the example of the present invention figure 1 The limitations of the dichotomy shown in , to avoid missing beams containing multipath information, such as figure 2 In the multipath environment shown, the optimal communication beam can be found with a high success rate and low complexity to improve the performance of the millimeter wave communication system.

[0029] The example of the present invention is mainly based on the idea of ​​a hierarchical search strategy, so a specific hierarchical codebook is also required. In this method, a proposed N-phase codebook will be used to replace the DFT codebook. The beam generated by this codebook has better sidelobe performance, whic...

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Abstract

The embodiment of the invention discloses a hierarchical beam searching method under a multipath channel based on an analog beamforming technology. Compared with a conventional binary beam searching method, the method provided by the embodiment of the invention can find the optimal communication beam with a higher success rate in a millimeter-wave communication system; and compared with an exhaustive searching method, the method provided by the invention is lower in searching complexity on the premise of obtaining almost the same success rate.

Description

technical field [0001] The invention relates to the communication field, in particular to a hierarchical beam search method under multipath channels. Background technique [0002] With the wide application of wireless communication technology, millimeter wave communication capable of achieving Gbps transmission rate has attracted more and more attention. However, millimeter wave communication must overcome the high path loss problem caused by its own transmission characteristics. Therefore, both parties of the communication need to be equipped with a multi-antenna system to use beamforming technology to realize the link budget. [0003] Under the current analog beamforming technology based on correlated antenna arrays, various improved hierarchical search strategy algorithms are only suitable for single-path communication environments where one energy is dominant, and are not suitable for multi-path environments. However, the real communication environment is mostly multi-p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/04
CPCH04B7/0456H04B7/0695
Inventor 邹卫霞李辉
Owner BEIJING UNIV OF POSTS & TELECOMM
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