A predictive blind equalizer based in Godard´s criterion for 256-QAM digital radio systems

This paper develops the theory of complex finite-length linear equalization based in predictive filter structures and Godard´s (1980) criterion. The complex equalizer is composed by a cascade of a forward and backward prediction-error filters plus a complex gain responsible for both power and carrier phase recovery. It can be updated adaptively at the same low computational cost as any other classical blind technique. Simulation results for digital radio links show that this technique performs very well with severe channel fadings in high-order QAM systems. In this case, some classical blind equalizers do not perform as well