A LOW-POWER PULSE WIDTH CODING SCHEME FOR COMMUNICATION RECEIVER SYSTEMS

Vyasa Sai, Ajay Ogirala, and Marlin H. Mickle

Keywords

Pulse width coding, low power, explicit clock-less decoding and wireless passive receiver systems

Abstract

This article introduces a novel pulse width coding (PWC) scheme for low-power applications. The symbol width properties of the pulse width encoding scheme allow the traditional decoder at the receiver side to be replaced with a low-power self-clocking decoding circuit. The major advantages of the proposed PWC scheme include minimal decoder hardware, synchronization between the transmitter and the receiver and low-power decoder. The low-power PWC scheme can be applied to various wireless passive device architectures such as passive tags and passive sensor nodes. Simulation results show that the PWC decoder implemented without an explicit clock has signi´Čücant low-power advantage when compared to a traditional clocked decoder.

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