Self-aligning wireless link using modulated backscatter

Vincent Fusco, Horacio Cantu

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A self-tracking (aligning) radio communications system based on the principle of modulated backscatter detection is presented here. Using amplitude-modulated backscatter from a co-operating target, a modified IQ demodulation scheme is used to reproduce automatically and in real time both the received and conjugate of the received phase of an incoming signal. The phase conjugated demodulated IF signal can have incoming backscattered data removed and new data are inserted before being up-converted using IQ single side-band generation so that retro-directive re-transmission can be made to occur. In the absence of the backscattered modulation signal, no phase conjugation and hence no retro-directed re-transmission can occur. The system reported is therefore inherently self-authenticating a facility not readily available from previously reported retro-directive self-tracking systems. © 2010 © The Institution of Engineering and Technology.
Original languageEnglish
Article numberIMAPCH000004000009001347000001
Pages (from-to)1347-1353
Number of pages7
JournalIET Microwaves, Antennas and Propagation
Issue number9
Publication statusPublished - Sep 2010

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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