Beam space MIMO-OFDM system based on ESPAR antenna

In this study, we like to show the beam space multiple-input and multiple-output orthogonal frequency division multiplexing (BS MIMO-OFDM) system based on the electronic steerable parasitic array radiator (ESPAR) antenna. This BS MIMO-OFDMMO transmission uses a single active antenna compared to the conventional MIMO transmission which requires multiple antennas to get multiplexing gain. For this reason, the hardware complexity of this system is reduced compared to the conventional MIMO system. Also, it is possible to miniaturize the antenna size. This paper proposes the transmitter and receiver structure for BS MIMO-OFDM system and analyzes the system performance. The proposed system has small degradation of BER performance. When the power of transmitted OFDM signal is low, the miss detection probability at the receiver occurs. In order to prevent this phenomenon, this paper would like to improve BER performance of BS-MIMO system by setting thresholds on the transmission power of an OFDM signal.