Redefining passive in backscattering with commodity devices
Mohammad Rostami, Karthik Sundaresan, Eugene Chai, Sampath Rangarajan, Deepak Ganesan
Abstract
The recent innovation of frequency-shifted (FS) backscatter allows for backscattering with commodity devices, which are inherently half-duplex. However, their reliance on oscillators for generating the frequency-shifting signal on the tag, forces them to incur the transient phase of the oscillator before steady-state operation. We show how the oscillator's transient phase can pose a fundamental limitation for battery-less tags, resulting in significantly low bandwidth efficiencies, thereby limiting their practical usage.
Topics & Concepts
LimitingBandwidth (computing)Transient (computer programming)Backscatter (email)CommodityElectronic engineeringComputer scienceElectrical engineeringOptoelectronicsPhysicsTelecommunicationsEngineeringWirelessBusinessMechanical engineeringOperating systemFinanceEnergy Harvesting in Wireless NetworksFull-Duplex Wireless CommunicationsUnderwater Vehicles and Communication Systems