Energy efficient implementation of soft iterative MIMO detection

The performance of coded MIMO systems can be enhanced by effectively utilizing soft iterative estimation techniques at the receiver. The main concern on this iterative techniques is computational complexity and feasibility of the hardware implementation. This paper evaluates a number of soft iterative MIMO detection schemes in terms of the bit error rate performance as well as computational complexity. We focus on the methods with a fixed and minimum hardware complexity to produce the best performance, for energy efficient implementation. After investigating a number of possible configurations of iterative loops, we suggest the most efficient structure and its algorithm to perform iterative estimations.