New soft stack decoder for MIMO channel

In this paper, we investigate the use of soft output decoders for signals transmitted on linear channels when applied to multiple input multiple output (MIMO) systems. A new soft output MIMO decoder is proposed. It´s an extension of the hard stack decoder. A straightforward idea was to exploit internal nodes still stored in the stack at the end of hard decoding process to calculate LLR. We show that the potential gain of such method is rather large then classical soft decoders.