On the equivalence of blind equalizers based on MRE and subspace intersections

Two classes of algorithms proposed for the blind equalization of multiple channels driven by a single source are the Mutually Referenced Equalizers (MRE) method by Gesbert et al., and the Subspace Intersection (SSI) method by Van der Veen et al. Although these methods seem at first sight unrelated, we show here that a variant of the SSI method and a particular member in the class of MRE methods provide mathematically identical solutions.