Browsing by Author "Hammadi, Yousif Ibrahim"

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    Master Thesis
    Study and design of mimo - ofdm system operating over wireless channel
    (2013) Hammadi, Yousif Ibrahim
    In this thesis, a new MIMO-OFDM model has been introduced. The performance of this model using PSK and QAM digital modulations for different antenna configura-tions is analyzed and evaluated under Rayleigh fading channel. MIMO-OFDM sys-tem can be implemented using higher order modulations to achieve large data capaci-ty and remarkable enhanced performance. The main purpose of using high order antenna configuration is to increase the space diversity, which will further decrease the BER at given Eb/N0 as compared to lower order Antenna configurations. It is found effectively the diversity order increases as number of receiving antenna increases regardless the number of transmitting antennas , also the lowest BER can be obtained at highest number of transmitting and receiving antenna configurations. MIMO-OFDM using PSK modulation provide remarkable lower bit error rate as compared to QAM technique at same constellation and antenna configuration.Finally , the effect of channel order on MIMO-OFDM system has been reported.