Figure 3

Sample spatial exclusion masks ${\mathcal{X}}_{[n]}$( c ). The top mask represents the fundamental knowledge implied by the principle of asynchronous access. Because of its maximum value ${\mathcal{X}}_{[n]}$(c = c_[n-1]) = 1, the element c_[n-1]cannot be chosen when selecting a new device outcome c_[n]. The bottom mask represents the assumption that outcomes similar to c_[n-1]should also be excluded from the selection of c_[n].