Pattern optimisation algorithm for vertical cell splitting system with active antenna arrays

A genetic algorithm (GA)-based pattern optimisation of active array antenna (AA) vertical cell splitting system is proposed. In the proposed algorithm, a joint optimisation method of inner cell pattern and outer cell pattern is designed, and GA is applied to optimise the array´s amplitude excitations for reducing the interference in AA vertical cell splitting system. The simulation results and performance analysis demonstrate the feasibility and validity of the proposed algorithm. In comparison to the conventional identical-excitation active AA patterns, the optimised results show that significant gain in both cell average throughput and cell edge throughput is obtained.