In recent decades many articles have discussed the possibilities of chaos applied in communications. However, the vast majority consider in practical terms the ideal channel condition, which is clearly a restringing condition. Some papers show that when there is an additive noise, the synchronization error often disrupts communication. In this work, we present results of a comparison between sy...

For a square matrix A, let S(A) be an eigenvalue inclusion set such as the Gershgorin region, the Brauer region in terms of Cassini ovals, and the Ostrowski region. Characterization is obtained for maps Φ on n × n matrices satisfying S(Φ(A) − Φ(B)) = S(A − B) for all matrices A and B. From these results, one can deduce the structure of additive or (real) linear maps satisfying S(A) = S(Φ(A)) fo...

In this brief, simple noncoherent detection methods for chaosshift-keying (CSK) modulation are proposed. By exploiting some deterministic property of the two chaotic maps, the proposed methods recover the digital message through simple decision algorithms. Specifically, the proposed methods exploit the difference in the return maps of the signals representing the digital symbols. Two specific a...

Convergence in distribution is investigated in a finitely additive setting. Let Xn be maps, from any set Ω into a metric space S, and P a finitely additive probability (f.a.p.) on the field F = S n σ(X1, . . . , Xn). Fix H ⊂ Ω and X : Ω → S. Conditions for Q(H) = 1 and Xn d → X under Q, for some f.a.p. Q extending P , are provided. In particular, one can let H = {ω ∈ Ω : Xn(ω) converges} and X ...

nowadays urban sanitary landfill compatible with environmental principles and in line with sustainable development is a necessity. in this paper for the purpose of determining appropriate sanitary landfill sites in kohgilooye & boyerahmad province, , many data layers were used including: slope, land cover, distance to main roads, distance to cities & villages, geology, surface water network, di...

This paper holds to establish a soft pre-compact map and investigate its associations with maps, almost A-almost compact A*-almost mildly semi-compact M-mildly maps besides M*-mildly which are utilized from the relations between their spaces under some conditions or without conditions. Consequently, composition factors of studied based on previous association them. Many examples given explain r...