Modeling and numerical analysis of MIMO system with single RF chain

The complexity and high insert loss of radio frequency (RF) front ends are main constrains in application of Multiple-Input Multiple-Output (MIMO) system, especially in large scale scenarios. As an attractive solution, the concept of switched parasitic array (SPA) was proposed to realize the same performance of MIMO system with single RF chain. To assess its feasibility and efficiency, in this paper, a systematic model based on SPA technique is built and simulated. Numerical results show great agreement with theory in aspect of bit-error-ratio (BER) and channel capacity.