Performance analysis of MIMO-OFDM systems on Nakagami-m fading channels

Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing (MIMO-OFDM) has become one of the key technologies for the B3G & 4G broadband wireless communications. As MIMO could increase the capacity of the wireless communication system considerably compared with Single Input Single Output (SISO) and OFDM could obtain good performances in multipath frequency-selective fading channels, we combine them together with the Space-Time Block Coding (STBC) scheme and the Nakagami-m fading model. The Nakagami-m (0.5 ≤ m <; ∞) fading model, covering a series of channel conditions in different fading parameters, brings greater flexibility and accuracy than normal, logistic and other distributions. From the simulation figures, we can draw the conclusion that the scheme could better performances of the system´s bit error rate (BER) and capacity greatly, thus improving the whole system´s performances.