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Multi-cell mmWave large-scale MIMO beam selection method based on beam discovery signal

A technology for signal discovery and multi-cell application in space transmit diversity, diversity/multi-antenna systems, radio transmission systems, etc. It can solve problems such as high complexity, large amount of information feedback, and untimely beam selection, and reduce complexity. , reduce the amount of information feedback, reduce the effect of beam interference

Active Publication Date: 2017-07-21
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0013] The present invention proposes a multi-cell mmWave large-scale MIMO beam selection method based on the beam discovery signal BDS, aiming at the sparse characteristics of the mmWave channel, that is, there are only a few effective transmission paths, and solves the high complexity of the existing mmWave large-scale MIMO beam selection algorithm. The amount of information feedback is large, and the beam selection is not timely

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  • Multi-cell mmWave large-scale MIMO beam selection method based on beam discovery signal
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  • Multi-cell mmWave large-scale MIMO beam selection method based on beam discovery signal

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Embodiment Construction

[0043] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] Firstly, in each beam selection cycle, the user performs a one-by-one correlation operation on the BDS composed of ZC sequences and the user's local ZC sequence set to obtain the root index of the ZC sequence corresponding to the user's best beam. Then, the received signal is descrambled to obtain the serving mmWave cell ID where the best beam is located. Finally, the user indexes the determined beams. At the same time, aiming at the problem of beam interference between mmWave cells, the present invention designs a multi-cell partial beam interference suppression algorithm. The essence of the algorithm is to determine the beams with strong mutual interference among the beams sent by mmWave cells, and then code them Multiplexing.

[0045] The beam discovery signal BDS of the present invention is composed of ZC (Zadoff-Chu) sequences with differen...

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Abstract

The invention relates to the technical field of multi-cell mmWave large-scale MIMO beamforming, and discloses a multi-cell mmWave large-scale MIMO beam selection method based on a beam discovery signal. A user performs related operations on a BDS and user local ZC sequence set constructed by a ZC sequence in each beam selection period one by one so as to acquire a ZC sequence root index corresponding to a user optimal beam; and then a received signal is descrambled to acquire a service mmWave cell ID corresponding to the optimal beam; finally, the user feeds back a determined beam index to a service cell; and meanwhile, the invention designs a multi-cell partial beam interference inhibition algorithm aiming at a beam interference problem between mmWave cells, the user processes the received signal so as to acquire the optimal beam and a strong interference beam of the user, the complexity of a beam selection algorithm is greatly lowered, and the inter-cell beam interference is effectively lowered.

Description

technical field [0001] The invention belongs to the field of mobile communication, and in particular relates to the beamforming technology of mmWave massive MIMO. Background technique [0002] With the rapid development of mobile services and the rapid popularization of smart terminals, wireless data services have exploded. Compared with the current fourth-generation mobile communication system, the next-generation mobile communication system is required to provide a capacity increase of at least 1000 times. To achieve this goal, various techniques have been proposed and extensively studied in the past few years. Among them, wireless communication in a large number of underused millimeter wave (mmWave) frequency bands (30-300GHz) is regarded as a key technology of 5G and has received significant attention. The shorter wavelength of the mmWave signal allows the base station (BS) to deploy dozens or even hundreds of antennas in a relatively compact space. This technology is m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0413H04B7/06
CPCH04B7/0413H04B7/0626H04B7/0695
Inventor 张祖凡陈岩博王平
Owner CHONGQING UNIV OF POSTS & TELECOMM
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