Dynamic range consideration in MIMO systems with Hybrid Antenna Selection

A Hybrid Antenna Selection (HAS), also called Soft Antenna Selection (SAS), method is basically implemented by a Linear Network (LN) which is located in RF domain of Multiple Input Multiple Output (MIMO) systems. In this paper, we evaluate the SAS-MIMO system, which is optimally tuned based on spatial multiplexing/diversity transmissions, in terms of receiver sensitivity issue. To this end, a SNR analysis is first performed for a reference point which is the mixer input. Then, the different systems are compared based on a standard receiver settings, which is WLAN 802.11b standard. A three Dimensional (3D) ray-tracing modeling is applied to assist this evaluation. The simulation results for a case study show that although the optimum post-LNA SAS works like a full-complexity MIMO in spatial multiplexing/diversity transmission strategies, it provides even a better SNR to the baseband, i.e. improves the receiver sensitivity.