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Hybrid beam forming method based on grouping optimization

A hybrid beam and analog beam technology, which is applied in the field of hybrid beamforming based on packet optimization, can solve the problem that the hybrid beamforming method cannot effectively reduce interference, etc.

Active Publication Date: 2019-11-22
CERTUS NETWORK TECHNANJING
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Problems solved by technology

[0004] The purpose of the present invention is to provide a hybrid beamforming method based on packet optimization to solve the problem that the existing hybrid beamforming method cannot effectively reduce interference and improve system capacity

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  • Hybrid beam forming method based on grouping optimization

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Embodiment Construction

[0032] 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.

[0033] A hybrid beamforming method based on packet optimization in a millimeter-wave large-scale MIMO multi-user system, the application scenarios are as follows:

[0034] In a single cell, K single-antenna users send data to the base station at the same time, and the base station is equipped with Nr Antennas and K radio frequency links are used to receive signals, and the array is a uniform linear array.

[0035] Send signal vector as The signal received by the base station is processed by the hybrid beamforming matrix, namely and To restore the vector s, the restored vector is expressed as ρ is the transmitted signal power, is the received noise vector. For any user, the codebook is set to a set of finite antenna array response vectors a(φ c ) is th...

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Abstract

The invention discloses a hybrid beam forming method based on grouping optimization. An existing method cannot well reduce inter-user interference, so that the system sum rate is not high, and good availability is not achieved. According to the method, the users are grouped by utilizing the user correlation and the user correlation threshold, the users with high correlation are divided into one group, and meanwhile, the number of the users in the group is reduced. Then, a vector set capable of providing higher signal power is screened out by utilizing the correlation between the user channel vector and the codebook. According to the method, users with large mutual interference are divided into one group through grouping. In order to maximize the capacity, a low-dimensional exhaustion algorithm is used in the group to reduce inter-user interference. And a greedy algorithm is used between groups, so that the influence of grouping is minimized. And the interference is greatly reduced while the system and the rate are improved. The method provided by the invention can effectively reduce the interference among users and improve the system and rate.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a method for reducing interference to a multi-user system, in particular to a method based on grouping optimization in a millimeter-wave large-scale multiple-input multiple-output (MIMO) multi-user system hybrid beamforming method. Background technique [0002] Millimeter-wave massive MIMO technology has been considered as a key candidate technology for 5G. The shorter millimeter wave wavelength is conducive to the deployment of large-scale arrays and improves the utilization of the transmission frequency band. In a multi-user millimeter-wave massive MIMO system, theoretically, digital precoding can be used to obtain the best performance. But this requires each antenna to be connected to a separate RF link, and a large number of RF links are required in mmWave massive MIMO systems, which brings high power consumption and high complexity. To address this difficulty...

Claims

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Application Information

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IPC IPC(8): H04B7/0408H04B7/06
CPCH04B7/0408H04B7/0617
Inventor 胡安中丁亚迪
Owner CERTUS NETWORK TECHNANJING
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