A 4-elements performance analysis of compact UWB antenna for MIMO-OFDM systems

摘要

In this paper, four-elements multiple-input-multiple-output (MIMO) antenna is presented for ultrawideband (UWB) applications. The proposed UWB MIMO array has dimensions of 40 × 40 mm2 is printed on FR4 epoxy substrate with the dielectric constant of 4.4 and a thickness of 1.5 mm Simulation and Experimental results of verify the improved impedance bandwidth of the proposed MIMO antenna which is larger than 7.5 GHz assigned by FCC regulations for UWB applications with isolation between the four ports better than 15 dB. The paper will describe the Partial Usage of Sub-channel (PUSC) modeling and mapping the subcarriers to the frame in orthogonal frequency division multiplexing (OFDM). The OFDMA symbol was divided into odd number and even number symbols for simulation purpose. MIMO systems offer high capacity over a SISO system which will be investigated. Moreover, The bit error rate (BER) performance of the MIMO-UWB system will be analyzed based on a low complexity MMSE.