Millimeter wave pure analog beamforming user scheduling method

A technology for simulating beams and user scheduling. It is applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., and can solve the problems of reducing the total reachable rate of the system and increasing the width of the main lobe of the beam.

Active Publication Date: 2021-01-01
HEFEI IC VALLEY MICROELECTRONICS CO LTD
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Problems solved by technology

However, the shared amplitude weighting causes the width of the main lobe of the beam to increase, and the probability of serious interference caused by users being covered by overlapping beams increases, and severe interference between users at close distances will lead to a decrease in the total achievable rate of the system

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  • Millimeter wave pure analog beamforming user scheduling method
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  • Millimeter wave pure analog beamforming user scheduling method

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Embodiment Construction

[0066] refer to figure 1 , the present invention proposes a millimeter-wave pure analog beamforming user scheduling method, which is applied to a downlink communication network environment composed of a base station and K user terminals; it is assumed that the antenna of the base station has N BS root, the number of RF chains is N RF The number of K user terminals is a single antenna, and the number of radio frequency chains is one; it includes the following steps:

[0067] S1. Let the channel of the κ-th user adopt the Rice channel model h κ

[0068]

[0069] where: ν k is the Rice factor of the κth client channel, h L,κ is the direct line-of-sight channel between the base station and the κth user end, in, is the downlink angle of departure of the κ-th user-end direct line-of-sight channel, is the angle of departure The antenna array response vector of ;

[0070] h N,κ is the scatter path channel between the base station and the κth user end, Among them, L ...

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Abstract

The invention provides a millimeter wave pure analog beamforming user scheduling method. The method comprises the following steps: S1, enabling a channel of a k-th user side to adopt a Rician channelmodel hk; S2, enabling a base station end to adopt an equidistant linear array antenna, and calculating an antenna array response vector alpha(theta) with an departure angle theta; S3, supposing thatthe base station has K*1 original signal s to be sent to K clients, and calculating a shared amplitude weighted analog beam forming matrix FRF; S4, conducting service user selection through a heuristic user scheduling method; S5, designing a shared amplitude weight; and S6, designing a k-th column fk of the first-stage analog domain precoding matrix F. The user scheduling mode is applied to a pureanalog domain beam forming technology, interference among multiple users is greatly reduced in a multi-path sparse scene, and the inherent defect that a pure analog beam forming scheme is not suitable for multi-user communication is overcome; only the departure angle of the downlink path of each user is needed, the path coefficient of the channel is not needed, only little channel information isneeded, and the training overhead is greatly reduced.

Description

technical field [0001] The present invention relates to the technical field of future 5G millimeter wave large-scale antenna array communication, in particular to a millimeter wave pure analog beamforming user scheduling method. Background technique [0002] Future 5G communications require greater bandwidth, higher data rates and spectral efficiency. The millimeter-wave frequency band has huge unlicensed spectrum resources and is considered to be a promising choice in 5G communications; at the same time, large-scale antenna array technology can resist path loss by obtaining higher antenna gain; in addition, in order to increase antenna direction gain, improve Coverage capability, beamforming technology has received widespread attention. Beamforming technology is divided into analog domain beamforming and digital domain beamforming. In most cases, beamforming in the analog domain is implemented through a phase shifter network, which is low in cost, but only applicable to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/0456
CPCH04B7/0617H04B7/0456
Inventor 刘家兵
Owner HEFEI IC VALLEY MICROELECTRONICS CO LTD
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