Honeycomb distributed type antenna system adopting directive antenna units

Abstract

The invention relates to a honeycomb distributed type antenna system adopting directive antenna units in the technical field of mobile communication, comprising a plurality of base station controllers and a plurality of distributed directive antenna modules, wherein each base station controller and each distributed directive antenna module are placed in a regular hexagonal honeycomb cell, the base station controllers and the distributed directive antenna modules are connected for transmitting information processed by the base station controllers, and the distributed directive antenna modules and a mobile user are connected for transmitting information interfered by a wireless channel; and the distributed directive antenna modules comprise M directive antenna units and N antenna frames, wherein the sector range of the directive antenna units is 120 DEG, M is not less than 6, and N is not greater than M. The honeycomb distributed type antenna system can reduce the planning cost of a system network, improve the error rate performance of the system on the boundary of the honeycomb cell, enlarge the channel capacity, simultaneously reduce the average error rate of the system, and improve the average channel capacity.

Description

technical field [0001] The invention relates to a system in the technical field of mobile communication, in particular to a cellular distributed antenna system using a directional antenna unit. Background technique [0002] As a solution that can effectively reduce transmission power, increase channel capacity, reduce transmission bit error rate and effectively cover "dead spots", distributed antenna system has been attracting much attention. The distributed antenna system consists of a base station and multiple antenna units connected to the base station. The base station controls the transmission of signals from each antenna unit and processes the signals received by each antenna unit. The distributed antenna system can be regarded as a special multi- Input multiple output (MIMO) system. In order to maintain good communication between the base station and the antenna unit, and to avoid frequency loss caused by transmitting information in an additional frequency band betwe...

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Problems solved by technology

When the co-channel interference reaches a certain threshold, the system will not work normally. At the same time, the continuous division of the cell will also bring problems such as more frequent handover, difficulty in system spectrum planning, and increased cost. This shows that the cell in the cellular system Splitting and frequency reuse technology will not meet the needs of future wireless communication development

[0004] After searching the existing literature, it was found that Xi Cao et al. published a paper entitled "Performance and capacity analysis for downlink pico cellular Distributed antenna systems with transmit antenna selection (Analysis of downlink performance and capacity of a microcellular distributed antenna system using transmit antenna selection)", this technology provides a distributed antenna system under a single-cell cellular structure, Choi W et al. In 2007, "IEEE Transaction on Wireless Communications (IEEE Wireless Communications Transactions)" published a paper entitled "Downlink performance and capacity of distributed antenna systems in a multicell environment" )” article, this technology gives the distributed antenna system under the multi-cell cellular structure, the distributed antenna system can obtain lower bit error rate and higher channel capacity, but in the border area of ​​the cell, the distributed antenna Neither the system nor the traditional cellular structure system can obtain lower bit error rate and higher channel capacity; and, in the existing distributed antenna system, due to the need to place a large number of distributed antenna units at different locations, it will increase The cost of network planning

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