Threshold based soft partial parallel interference cancellation for MIMO-OFDM system

The multiple input multiple output (MIMO) technology combined with orthogonal frequency division multiplexing (OFDM) is a dominant air interface technology for 4G and 5G wireless communication technologies. In this paper we proposed a new threshold based soft partial parallel interference canceller for MIMO-OFDM system. The MIMO detector based on the hybrid use of soft minimum mean square error (MMSE) equalization and proposed threshold based partial parallel interference cancellation (PPIC) is applied on each OFDM subcarrier. From simulation results, it is shown that proposed interference cancellation technique outperforms the conventional interference cancellation techniques such as parallel interference (PIC) and ordered successive interference cancellation (OSIC).