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User distance based pilot frequency distribution method in large scale distributive antenna system

A distributed antenna and pilot allocation technology, applied in the field of wireless communication, to achieve the effect of low complexity

Active Publication Date: 2016-09-28
上海瀚芯实业发展合伙企业(有限合伙)
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Problems solved by technology

[0005] Technical problem: In order to overcome the shortcomings of the existing pilot scheduling algorithm, the present invention provides a scheduling algorithm based on the distance between users, which can achieve the optimal scheduling performance of approximation traversal with a relatively low complexity

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  • User distance based pilot frequency distribution method in large scale distributive antenna system
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  • User distance based pilot frequency distribution method in large scale distributive antenna system

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing and specific example, further illustrate the present invention, should be understood that this example is only used to illustrate the present invention and is not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalents of the present invention Modifications in form all fall within the scope defined by the appended claims of this application.

[0040] First, the following description is made: In a distributed massive MIMO system, there are K single-antenna users in total, forming a set U, and each RAU at the base station is also equipped with a single antenna, and the number of RAUs is M. E. P Indicates the pilot power, Indicates the p-th pilot sequence, and satisfies h k ∈C M×1 Indicates the channel vector from the kth user to the base station, Y∈C M×τ is the received signal matrix, N∈C M×τ is the noise matrix.

[00...

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Abstract

The invention discloses a user distance based pilot frequency distribution method in a large scale distributive antenna system. The method is characterized in that after a user in a dominated state is selected as a key user, P-1 users that are most adjacent to the user is eliminated and the rest users is divided into P groups by adopting the distribution method in a recursive way; the optimal group and the user in the dominated state are arranged in one pilot frequency group and the distribution of the next pilot frequency group is performed, wherein P is the pilot frequency number. According to the invention, by adopting the employed algorithm, the estimation performance approximate to traverse optimal (performance upper limit) can be realized with comparatively low complexity.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a pilot scheduling algorithm based on user distance in a large-scale distributed antenna system. Background technique [0002] Distributed antenna system is a new wireless communication architecture, which includes multiple antenna units that are geographically dispersed but connected to a central processing unit through optical fibers or cables. Compared with the centralized antenna system, it has obvious advantages in reducing the transmission power, improving the coverage area, and reducing the probability of interruption. At first, the distributed antenna system was mainly used to improve the coverage area of ​​indoor wireless communication and reduce the probability of interruption. Later, it gradually developed into a mainstream communication technology in outdoor areas such as open-air stadiums and urban areas. At present, as a new form of network architect...

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Application Information

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IPC IPC(8): H04L5/00
CPCH04L5/005
Inventor 朱鹏程尤肖虎万圣博
Owner 上海瀚芯实业发展合伙企业(有限合伙)
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