Ultra-efficient convolution encoder design in quantum-dot cellular automata with power dissipation analysis

Abstract

Nowadays, Quantum-dot Cellular Automata (QCA) is a well-known technology for designing digital systems. Actually, QCA is the most possible alternative for semiconductor transistor based technology. In this paper, an improved design of QCA based convolution encoder has been proposed. The proposed encoder outperforms previous QCA based design from the view of size, speed, and power consumption. A popular simulator, QCADesigner has been used for simulating and verifying the proposed encoder. Simulation result shows proposed encoder’s dominance against previous designs from the context of cell number, area, latency, and energy consumption. The proposed 1/2 rate and 1/3 rate encoder reveal 89% and 85% less energy consumption at 0.5Ek tunneling energy level as compared to the previous design. It is worth mentioning that 90% and 86% optimizations in the number of cells in addition to 95% and 96% optimizations in the area are achieved for the proposed 1/2 rate and 1/3 rate convolution encoder, respectively, in comparison with the previous design. Keywords: Quantum-dot cellular automata, Convolution encoder, Power dissipation, QCADesigner, QCAPro