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Beam Searching Method in Millimeter Wave Communication

A search method, millimeter-wave technology, applied in the field of beam search, can solve the problem of low search efficiency, achieve the effect of reducing time complexity, reducing search complexity, and improving beam search efficiency

Active Publication Date: 2018-01-02
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Exhaustive search is a simple and easy search method, but this method needs to traverse the entire codebook, and the search efficiency is very low

Method used

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  • Beam Searching Method in Millimeter Wave Communication
  • Beam Searching Method in Millimeter Wave Communication
  • Beam Searching Method in Millimeter Wave Communication

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Embodiment Construction

[0040] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0041] The present invention realizes the hierarchical codebook structure design by utilizing the characteristics of layer-by-layer refinement of antenna weight vectors in the codebook and the beam coverage relationship between the antenna weight vectors. Based on the hierarchical structure of the codebook, a suboptimal search method based on binary search is designed.

[0042] The beamforming-based 60GHz WLAN system model is as follows: figure 1 As shown, two 60GHz WLAN devices, DEV1 and DEV2, are included. Both DEV1 and DEV2 use a uniform linear array (uniformly linear array, ULA), and the interval between ULA array elements is half a wavelength. The number of ULA elements of DEV1 and DEV2 is N respectively s and N d . In the figure w s and w d are the antenna weight vector (AWV) of DEV1 and DEV2 respectively, and ‖w s ‖=‖w d ‖=1, ‖·‖ means...

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Abstract

The invention relates to a wave beam searching method in millimeter wave communication. According to the method, wave beam searching is carried out on the basis of a hierarchical C / A codebook and a P codebook for occasions with higher requirement for the wave beam resolution. The invention provides the C / A codebook wave beam searching method based on the threshold. During search, a threshold and a confidence interval are set, each time of searching only needs to calculate the receiving SNR for once, satisfied receiving SNR updates the searching threshold and used to searching for the next time, and based on rough searching, P codebook wave beam searching based on binary search is realized. Compared with rough searching without threshold, the C / A codebook wave beam searching based on the threshold reduces the searching complexity for half, and the codebook searching efficiency is improved; and compared with the prior art, the time complexity of wave beam searching is lower.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a beam search method in millimeter wave communication. Background technique [0002] In recent years, with the rapid development of wireless communication technology, the demand for bandwidth of wireless communication is increasing day by day, resulting in increasingly tight spectrum resources in low frequency bands. Therefore, the industry has begun to focus on the millimeter wave (Millimeter wave, MMW) frequency band. The millimeter wave frequency band has extremely rich spectrum resources, so it has high potential commercial value. As a typical application of millimeter wave communication, a 60GHz wireless local area network (wireless local area network, WLAN) achieves a communication rate up to gigabit in the 60GHz band. The successive releases of IEEE 802.15.3c and IEEE 802.11ad, which currently support 60GHz WLAN, heralds the wide application pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0456H04B7/0617H04B7/0639
Inventor 肖振宇白琳贺同
Owner BEIHANG UNIV
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