A Programmable Hamming Encoder/Decoder System Design with Quantum-dot Cellular Automata

Quantum-dot cellular automata (QCA) is a candidate paradigm for current CMOS logic circuits. Its inherent deep pipelining nature provides an expedience for bit-serial operations. However, many previous systems were implemented with bit- parallel circuits design because they can usually be achieved by direct equivalent conversion in lieu of conventional counterparts, which would cause problems of large area delay products and functional insufficiency. It is supposed to further exploit the aforementioned potentiality of QCA. In this work, we present a serial input serial output Hamming encoder/decoder communications system with QCA, which refers to both configurational and mathematical operations of bit string. The main contributions of this work are: first, a serial signal distribution network (SSDN) is proposed to achieve bit-serial data reshaping such as editing and alteration; second, we find the convolution computation may be a basic format for bit-serial operating circuits; third, the proposed system has a lower area delay product than previous work and employs an easily programmable structure.