Performance Analysis of MIMO-OFDM system with Zero Forcing ReceiverDownload PDF
Next generation wireless communication technologies require multimedia service such as internet services, speech, image and mainly high data rate with high mobility. Orthogonal Frequency Division Multiplexing (OFDM) is an efficient method for 4G wireless systems because it promises data rates up to one Gbps stationary conditions and up to about 100 Mbps under vehicular conditions. The Multiple Input and Multiple Output (MIMO) technique provides increased link capacity, spectral efficiency and high data rate. MIMO is used to increase the diversity gain and to enhance the system capacity on time-variant and frequency-selective channels. Combining these two technique resulting MIMO- OFDM system to get the advantage of both the technologies. In this paper, Zero Forcing receiver is used to analyze the performance of MIMO OFDM system. Simulation results show that improved Bit Error Rate (BER) is obtained with MIMO-OFDM system than the OFDM system. In addition Bit Error Rate BER performance is also investigated for different number of transmitting and receiving antennas and different modulation techniques.
Keywords: Orthogonal Frequency Division Multiplexing (OFDM), 4G, Multiple Input and Multiple Output (MIMO), MIMO-OFDM, Zero Forcing receiver, Bit Error Rate (BER)