Low Complexity BICM-OFDM-based MIMO Receiver using Successive Interference Cancelation

This paper proposes a low complexity receiver for the next generation BICM-OFDM-based WLAN systems. It uses the multiple transmitting antennas in a Spatial Multiplexing (SM) mode. After successfully decoding one data stream, the proposed scheme regenerates the transmitted signal and removes its interference to other streams. Each stream independently employs bit interleaving in the frequency domain and uses convolutional codes to mitigate the effect of channel fading. The better stream is decoded first to reduce the error propagation problem. As Packet Error Rate (PER) is used as a comparison metric, simulation results show that the proposed scheme outperforms a simple Minimum-Mean-Squared-Error (MMSE) receiver without Successive Interference Cancelation (SIC) by about 2 dB in a 2×2 sysstem.