Iterative Nonlinear Channel Compensation in MC-CDMA Systems

In this contribution we present an efficient multi-user data predistortion algorithm for the compensation of the nonlinear channel in the forward link of a wireless multiple access MC-CDMA system. A simplified method which eases the implementation of the iterative procedure by trading off performance and complexity is also described. Furthermore, we demonstrate that the performance of the proposed compensation scheme can be improved by combining it with a judicious allocation of the spreading signature codes. Computer simulations evidence a significantly better performance with respect to a conventional memoryless pre-distortion technique.