Two Contributions Derived from a Polynomial Formulation of the Constant Modulus Criterion
Denis G. Fantinato, Romis Attux, Celso de Sousa Jr., Ricardo Suyama, Aline Neves, J.M.T. Romano

DOI: 10.14209/sbrt.2013.6
Evento: XXXI Simpósio Brasileiro de Telecomunicações (SBrT2013)
Keywords: Blind equalization constant modulus criterion Equalizability index CMA initialization
From the classical blind CM criterion, we derive a MSE-based polynomial formulation that lead to two contributions: a lower bound of the CM criterion, which works as an equalizability index, and an initialization heuristic for the CMA. The results indicate the validity of the index as an analytical tool and as a practical performance assessment metric in the context of inverse problems. For the heuristic, the results reveal that it is capable of outperforming the classical center-spike method and a random initialization approach.