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Active antenna array beam optimization method based on tracking and prediction of user position

An active antenna and beam optimization technology, applied in wireless communication, advanced technology, network planning, etc., can solve problems such as beam power optimization

Active Publication Date: 2015-04-01
XIDIAN UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide an active antenna array beam optimization method based on user position tracking and prediction, aiming to solve the problem of accurate tracking and prediction of user position by base station antenna beam and the problem of user-level beam power optimization

Method used

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  • Active antenna array beam optimization method based on tracking and prediction of user position

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specific Embodiment

[0135] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0136] Step 1, determining the motion model and measurement model of the mobile user;

[0137] The user moves in the cell, and its motion state can be described by the current position and speed:

[0138] x k =[x(k), v x (k),y(k),v y (k)] T ;

[0139] k in the above formula is t k Shorthand for time, (x(k), y(k)) means t k The user's location coordinates at the moment, v x (k) and v y (k) represent t respectively k The speed of the user in the direction of the X-axis and the Y-axis at all times; in the present invention, an approximate uniform linear motion model is used to move the user:

[0140] x k+1 =F k x k +G k w k ;

[0141] where the coefficient F k and G k Given by the following formula:

[0142] F k = 1 Δt ...

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Abstract

The invention discloses an active antenna array beam optimization method based on tracking and prediction of a user position. Based on the active antenna user level beam forming technology, the accurate prediction and tracking of the user position are achieved, the information interaction between a base station of a user is effectively reduced, and the handling capacity of a system is improved though a beam optimization algorithm. By means of the active antenna array beam optimization method based on tracking and prediction of the user position, the tracking and prediction of the user position are accurately achieved, the information interaction between the base station and the user is reduced, the utilization rate of spectrum resources is increased, the system capacity and the user performance are improved, and the large user performance improvement is achieved. Meanwhile, beam optimization is conducted based on the total handling capacity in a cell, an optimized beam power allocation algorithm is proposed, and the system capacity is increased.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an active antenna array beam optimization method based on user position tracking prediction. Background technique [0002] In future mobile communications, with the continuous increase in the number of mobile users and the continuous growth of terminal data traffic, it is necessary to introduce new technologies into the existing LTE network to meet user experience. In the subsequent evolution of LTE-A technology, the active antenna beamforming technology is proposed in the 3GPP standard, which can improve the capacity of the system. The active antenna system not only has antenna elements in the horizontal direction, but also has antenna elements in the vertical direction. Each antenna element has an independent radio frequency unit, which can flexibly control the horizontal and vertical directions of the beam. The LTE downlink physical layer standard R...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/28H04W24/02
CPCH04W16/28H04W24/02Y02D30/70
Inventor 杨清海杨遵立
Owner XIDIAN UNIV
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