Fault Tolerance Improvement of QCA Binary Wire in Space Radiation Environment

Communication satellites are generally outside the Earth's atmosphere and the most important characteristic of this environment is the existence of high energy ionizing radiations of MeV energy. The semiconductor materials used in satellites are highly vulnerable to environmental impacts of radiations and electrical, optical and physical characteristics of these materials will be affected and the circuit efficiency will degrade. Because of these problems the available and cost-accessible techniques should be considered. Nowadays, there are many small satellites with the telemetry and telecommunication missions. The high cost of putting satellites in their orbits and problems related to the integration of satellites and their carriers are among the reasons for the development of nano satellites. Reducing the size of components, circuits become more sensitive and circuits with nano dimensions are more vulnerable to space radiations. Quantum cellular automata circuits with the minimum power consumption are a suitable way for the construction of arithmetic circuits in the nanoscale. Providing a method to increase the fault tolerance and simulation of this method for QCA binary wire is discussed in this paper.