ESPAR antenna based diversity scheme for multiple antenna OFDM system

This paper proposes a diversity scheme for multiple antenna in OFDM system based on an electrically steerable parasitic array radiator (ESPAR) antenna. Although the 2 × 2 OFDM system is capable of doubling the capacity without expanding the occupied frequency bandwidth, we can´t get the additional diversity gain using the linear MIMO decomposition method. This proposed method can improve the bit error rate performance (BER) by making efficient use of ESPAR antenna. Computer simulation results shows that the proposed scheme gives the additional diversity gain about 3.9 dB for ideal channel and 2.55 dB for estimated channel for maximal likelihood detection (MLD) with scheme 2 × 2 MIMO conventional.