Wave beam searching method in millimeter wave communication

A search method and millimeter wave technology, applied in the field of beam search, can solve problems such as low search efficiency, and achieve the effects of reducing time complexity, improving beam search efficiency, and improving codebook search efficiency

Active Publication Date: 2015-09-23
BEIHANG UNIV
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  • Abstract
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  • 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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  • Wave beam searching method in millimeter wave communication
  • Wave beam searching method in millimeter wave communication
  • Wave beam searching method in millimeter wave communication

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Embodiment Construction

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

[0041] The invention realizes the hierarchical codebook structure design by using the layer-by-layer refinement characteristics of the 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 60GHz WLAN system model based on beamforming is as figure 1 As shown, two 60GHz WLAN devices, DEV1 and DEV2, are included. Both DEV1 and DEV2 use a uniformly linear array (ULA), and the ULA array element spacing is half a wavelength. The number of ULA array elements of DEV1 and DEV2 are N respectively s And N d . W in the figure s And w d Are the antenna weight vector (AWV) of DEV1 and DEV2 respectively, and ‖w s ‖=‖w d ‖=1, ‖·‖ means 2 norm. note figure 1 It is a half-duplex model, DEV1 and D...

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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 specifically 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 bandwidth demand for wireless communication has been increasing, which has led to increasingly tight frequency 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, 60GHz wireless local area network (WLAN) achieves a communication rate of up to gigabit in the 60GHz band. The successive releases of the current standards IEEE 802.15.3c and IEEE 802.11ad that support 60GHz WLAN have heralded the broad application prospects of 6...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/06
CPCH04B7/0456H04B7/0617H04B7/0639
Inventor 肖振宇白琳贺同
Owner BEIHANG UNIV
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