BER Performance Analysis and PAPR Mitigation in MIMO OFDM Systems

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Wireless communications is expected to provide users with wireless multimedia services like high speed internet access, wireless television and mobile computing. These services are providing the communication technology with high data rates, higher carrier frequencies and mobility which enables reliable transmissions over mobile radio channels gaining much growth demand. OFDM system will be effective means of communication if this orthogonality of carrier signals are maintained properly. Modulation is the process of mapping the data onto the carrier signal amplitude or phase. Transmitting a baseband signal over a long distance is highly impossible due to loss of signal strength. MIMO systems can get better the capacity by only using few minimum number of transmit or receive antennas when compared to single input single output systems in flat fading channels. Fourth generation MIMO- OFDM systems has capacity, exposure and dependability higher over multipath fading channels.