An Optimum Pre-Filter for ICA Based Multi-Input Multi-Output OFDM System
In this paper, the authors present an optimum pre-filter for ICA based multi-input multi-output OFDM system. In their former work, they presented a pre-filter solution for multiuser reconstruction in ICA based MIMO-OFDM systems. Here, based on the structure of the system and former pre-filter solution, an optimization problem has been designed to give them the optimum pre-filter. The designed problem is based on minimization of the estimation error of ambiguities inherent to ICA in reconstruction of the data after separation. The optimization problem is mathematically solved and a set of optimized coefficients are obtained.