Bit error rate 1 Channel estimation 1 Channel state information 1 Communication channels (information theory) 1 DACE 1 Data aided channel estimation 1 Data symbols 1 Data-aided Errors 1 Estimation 1 Frequency estimation 1 Gain control 1 Least squares approximations 1 MIMO systems 1 MIMO-OFDM 1 Mean square error 1 Multiple-input multiple-output orthogonal frequency-division multiplexing 1 OFDM 1 Orthogonal frequency division multiplexing 1 Performance 1 Reliability 1 Signal receivers 1 Signal to noise ratio 1 Spatial resources 1 Spectrum efficiency 1 Symbol 1 Symbols 1 Wireless channel 1 Wireless communication 1 Wireless communications 1