Design of QCA based Three-Stage Pseudo Random Number Generator

Abstract

Quantum-dot Cellular Automata (QCA) technology offers higher switching, compact structures and lower energy consumption. A Pseudo Random Number Generator (PRNG) is a fundamental block in communication system which is used at the transmitter end to spread the sequence over a wide frequency band and the same is used at the receiver to despread the demodulated signal. The total area and energy dissipation of the PRNG becomes a very important concern in the design. This paper presents the implementation of a compact three-stage PRNG using CAD tool QCADesigner. The efficacy of the proposed PRNG circuit is assessed in terms of cell count, total area, latency and energy dissipation using QCA Designer-E. The proposed three-stage PRNG operates at higher switching speed and is 41% and 23% more efficient in terms of energy dissipation and cell count than the existing architectures, can be used for spreading of the sequence.