Method for optimizing base station side antenna port position of multi-cell distributed MIMO system

Abstract

The invention discloses a method for optimizing the base station side antenna port position of a multi-cell distributed MIMO system. The method comprises the steps of (1) setting the basic conditions of the multi-cell distributed MIMO system and constructing a multi-cell distributed MIMO system compound channel model, thereby obtaining the cell structure of the system and a system signal model, (2) performing mathematical analysis on the outage probability in the multi-cell distributed MIMO system to obtain the system outage probability and the system mean outage probability both related to the cell radius and the antenna position, and (3) calculating the minimum value of the system mean outage probability by use of an iterative search algorithm, and obtaining system antenna position corresponding to the minimum value of the system mean outage probability as the optimal position of the antenna port of the multi-cell distributed MIMO system. According to the method, the outage probability performance of the multi-cell distributed MIMO system is improved and the optimal coverage of the port antenna is realized, and consequently, energy saving and environmental protection of the distributed antenna system are realized and the cost expenditure of network layout is reduced.

Description

technical field [0001] The present invention relates to a multi-cell distributed MIMO system base station side antenna port position optimization method based on the system outage probability as the optimization target, so as to realize the upper layer network planning and position optimization design of the distributed MIMO system base station side antenna port in a multi-cell environment. It belongs to the field of modern wireless communication. Background technique [0002] With the introduction and vigorous advocacy of low-energy green mobile communication technologies in recent years, distributed MIMO systems have gradually attracted widespread attention from scholars at home and abroad. Since the distributed MIMO system shortens the average access distance between the mobile station and the access antenna port in the cell, it can greatly reduce system transmission power, improve communication stability, and increase system capacity; compared with traditional centralize...

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Problems solved by technology

For the distribution of optimal antenna port positions in a multi-cell distributed MIMO system, in existing studies, the design of the optimal antenna port position is mainly based on the average system capacity to improve system performance; however, the outage probability is used to reflect user session Another important indicator of access performance also has very important practical value and research significance. However, due to the complexity of theoretical research on outage probability, current research mainly focuses on the theoretical analysis of outage probability.

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