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MU-MIMO system user scheduling method based on signal-to-leakage-and-noise ratio

A technology for signal-to-leakage-to-noise ratio and system users, applied in transmission systems, radio transmission systems, electrical components, etc., can solve the problems of high requirements for channel state information and high computational complexity of algorithms, and reduce switching overhead and complexity Reduced effect

Active Publication Date: 2019-09-06
GUANGXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to solve the problem of high computational complexity of the current algorithm and the high requirement for channel state information in the actual communication system

Method used

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  • MU-MIMO system user scheduling method based on signal-to-leakage-and-noise ratio

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Embodiment Construction

[0044] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

[0045] Such as figure 1 As shown, the present invention considers a multi-cell downlink cellular network environment, the number of cells is L, and the base station is configured with N t There are only one transmit antenna, and the cell communicates with K users through a single antenna. In each time slot, it is assumed that users are independent and randomly distributed in a cell, N is the number of users selected in user scheduling, and the set of N users served by the base station is denoted as S N . Suppose M k Indicates the number of receiving antennas of the kth (k=1, 2, ..., K) user, and satisfies ...

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Abstract

The invention discloses an MU-MIMO system user scheduling method based on a signal-to-leakage-and-noise ratio, relates to the field of mobile communication. A user scheduling algorithm based on an SLNR is used to maximize the SLNR of the single-antenna receiving system. Each base station calculates a weighted sum rate and then transmits a value to a central unit, and then the central unit determines an optimal user by comparing scalar feedback from the base stations. According to the method, the greedy user search algorithm is improved, the channel state information (CSI) exchange overhead isreduced, the calculation complexity is effectively reduced, and the performance loss of the signal-to-noise ratio can be almost ignored.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for scheduling users in an MU-MIMO system based on a signal-to-leakage-to-noise ratio. Background technique [0002] Due to the limitation of system resources, user scheduling is very necessary in the actual communication process. By selecting active users in the cell to serve, a greater user diversity gain can be obtained. User scheduling needs to balance the following three goals: (1) to maximize the average system energy efficiency; (2) to meet the expected fairness constraints among users; (3) to be able to achieve real-time and low computational cost. In the SLNR-based precoding scheme, every time a user increases the number of receiving antennas, additional signal leakage of other users needs to be considered, resulting in a decrease in the user's SLNR. At this point, the system may not be able to schedule the largest data streams for all users at the same time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0452
CPCH04B7/0452
Inventor 万海斌赵金鑫覃团发陈海强黎相成
Owner GUANGXI UNIV
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