On convergence constraint precoder design for iterative frequency domain multiuser SISO detector

Convergence constraint power allocation (CCPA) in single carrier multiuser (MU) single-input single-output (SISO) systems with iterative frequency-domain (FD) soft cancelation (SC) minimum mean-squared error (MMSE) equalization is considered in this paper. In order to exploit full benefit of iterative receiver, convergence properties need to be considered. The proposed scheme can guarantee that the desired mutual information point/value after sufficient amount of iterations is achieved. In this paper, successive convex approximation algorithm is proposed as a solving the non-convex convergence constraint power minimization problem. Furthermore, the results of EXIT-chart analysis demonstrate that the CCPA design can achieve the objectives described above