Surface acoustic wave tag-based coherence multiplexing

US9477857B2 · kind B2 · utility

Assignees

• University of Central Florida Research Foundation · US
• The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · US

Inventors

• Robert C. Youngquist · Cocoa, US
• Donald Malocha · Oviedo, US
• Nancy Saldanha · Baltimore, US

Key dates

• Filing date: Aug 7, 2013
• Grant date: Oct 25, 2016
• Expiry date: Nov 14, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04J14/002
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A surface acoustic wave (SAW)-based coherence multiplexing system includes SAW tags each including a SAW transducer, a first SAW reflector positioned a first distance from the SAW transducer and a second SAW reflector positioned a second distance from the SAW transducer. A transceiver including a wireless transmitter has a signal source providing a source signal and circuitry for transmitting interrogation pulses including a first and a second interrogation pulse toward the SAW tags, and a wireless receiver for receiving and processing response signals from the SAW tags. The receiver receives scrambled signals including a convolution of the wideband interrogation pulses with response signals from the SAW tags and includes a computing device which implements an algorithm that correlates the interrogation pulses or the source signal before transmitting against the scrambled signals to generate tag responses for each of the SAW tags.