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Efficient beam training method of intelligent reflecting surface assisted millimeter wave communication system

A technology of beam training and reflector, which is applied in the direction of transmission system, radio transmission system, diversity/multi-antenna system, etc., to achieve accurate beam alignment and realize the effect of beam alignment

Active Publication Date: 2020-06-05
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

These multi-antenna users need to achieve initial access with the base station

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  • Efficient beam training method of intelligent reflecting surface assisted millimeter wave communication system
  • Efficient beam training method of intelligent reflecting surface assisted millimeter wave communication system
  • Efficient beam training method of intelligent reflecting surface assisted millimeter wave communication system

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] see figure 1 , an architecture diagram of a millimeter-wave communication system assisted by multiple intelligent reflectors (IRS). When there is blockage between the user and the base station, and there is a line-of-sight (LOS) between the base station and the IRS, and between the IRS and the user, the base station transmits a beam to the IRS, and the IRS By adjusting its own reflection parameters, the reflected beam is aimed at the user. In this way, the obstruction is bypassed through the IRS, thereby improving the service quality of the user and the coverage of the network. In addition, there is wireless feedback between the user and the base station, the user and the reflecting surface, and the reflecting surface and the base station. The link, that is...

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Abstract

Aiming at the problem of how to perform multi-user initial access in a plurality of intelligent reflection surface auxiliary millimeter wave communication systems, the invention provides an efficientbeam training mechanism which can achieve the beam alignment of multiple users at the same time with lower training overhead. At first, a wide beam pattern design based on phase adjustment is provided, and a wave width controller capable of flexibly controlling the beam width by adjusting parameters is designed based on quadratic regression; aiming at a new network architecture after introductionof a plurality of reflecting surfaces, the invention provides a beam training strategy based on space-time search, and initial access of a plurality of users can be realized at the same time with relatively low training overhead; in order to accelerate a wave beam training process, new self-adaptive layered codebooks are designed on a base station and an intelligent reflecting surfaces respectively.

Description

technical field [0001] The present invention relates to the realization of multi-user by designing a dynamic beam pattern, an efficient beam training strategy and an adaptive layered codebook in the case of multiple multi-antenna users in a millimeter-wave communication system assisted by multiple intelligent reflectors The invention relates to initial access, belonging to the technical field of wireless communication. Background technique [0002] With the explosive growth of data traffic, millimeter wave (mmWave) has become a key technology of the fifth generation of mobile communication due to its abundant available frequency bands. The first serious challenge to realize millimeter wave communication is path loss. In order to compensate for the serious path loss of millimeter wave transmission, millimeter wave base stations usually use large-scale antenna arrays for narrow beam transmission, which can effectively concentrate the transmission energy in a certain area or d...

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Application Information

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IPC IPC(8): H04B7/06H04B7/0456
CPCH04B7/0617H04B7/0456H04B7/04013
Inventor 贾承璐高晖许文俊陆月明
Owner BEIJING UNIV OF POSTS & TELECOMM
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