Adaptive Semiblind Receiver for 3GPP LTE Downlink MIMO-OFDM Systems

A suboptimal adaptive semiblind receiver is proposed for 3GPP LTE downlink MIMO-OFDM systems. The receiver directly detects data using frequency diversity of code division multiplexing technique and updating tap-weight vector exploits the contribution of information from pilot signal and data signal on the resource block mapping. The complex frequency-domain space-frequency received shift sub-resource block signal sequence matrix is formulated to take the diversity from MIMO-OFDM scheme and combats the effect of inter-carrier-interference. Numerical results show that performance of proposed adaptive semiblind receiver outperforms adaptive pilot-based receiver in term of BER over ITU MIMO Pedestrian A and Vehicular A in fast time varying frequency-selective fading channel models.