An Antenna Pattern Optimization Method for Vertical Cell Splitting of Active Antennas

Abstract

The invention discloses a directional pattern optimization method for an active antenna vertical cell splitting system. The method comprises the following steps that a chromosome coding scheme of an antenna directional pattern is determined; the chromosome gene information is set; the chromosome evolution parameters are configured; the directional pattern optimization scheme is coded for forming a chromosome initialization population according to the chromosome evolution parameters; the gene of each chromosome is normalized; the adaptability degree of each individual is calculated through the adaptability function; whether a termination condition is met or not is judged, if the conditions are not met, a new generation of individuals can be obtained through selection, crossing and variation; the normalized gene of each chromosome of the new generation of individuals is returned, and the circulation is carried out in such a way until the termination conditions are met; if the condition is met, the optimum scheme is output. The method provided by the invention has the advantages that the amplitude excitation of the vertical cell splitting inner and outer ring antenna directional pattern is optimized, and the interference of the vertical splitting cell inner and outer rings and the interference between adjacent cells are reduced, so the system performance is improved.

Description

technical field [0001] The invention relates to an antenna pattern optimization method, in particular to an antenna pattern optimization method for active antenna vertical cell splitting, and belongs to the technical field of communication. Background technique [0002] With the explosive growth of mobile communication users, network expansion has become urgent. The traditional network expansion method is cell division, that is, reducing the coverage area of ​​the existing cell, and introducing new base stations to cover the newly generated blind area. Therefore, operators must pay a high price for this expansion method, including adding new base station equipment and leasing new site sites. However, in densely populated cities, it is already difficult to find suitable sites. [0003] With the development of antenna theory and technology, it has been found that the directivity of antennas to transmit radio waves can be used to achieve space division multiple access, furthe...

AI Technical Summary

Problems solved by technology

But in fact, due to more co-channel interference generated by cell splitting, although the throughput of the cell is improved, it does not get the expected high gain

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