A novel orthogonal spreading matrix

摘要

This paper proposes a novel orthogonal spreading matrix (OSM) for the iterative detection (ID) with the minimum mean square error-soft interference cancellation soft-in soft-out (MMSE-SIC SISO) detector. The novel OSM concatenates block diagonal orthogonal matrices and random permutation matrices. Simulation results show that the novel OSM using ID significantly improves the BER of the conventional OSM using the maximum likelihood detection.