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Capacity of Intelligent Quadrifiliar Helix Antenna (IQHA) Based MIMO System

We investigate the capacity of Intelligent Quadrifiliar Helix Antenna (IQHA) based Multiple-input- multiple-output (MIMO) communication system. We will show that IQHA based MIMO system is able to offer larger capacity compared with MIMO system without using IQHA. And at the same time, it can reduce the number of RF chains following the antenna, thus reducing the total cost. Two sub-optimal algorithms are proposed to adjust the weights of IQHA to maximize the capacity.