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Mutually exclusive data encoding for realization of a full duplexing self-steering wireless link using a retrodirective array transceiver

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2 Author(s)
Leong, K.M.K.H. ; Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA ; Itoh, T.

A two-way communication link is established between an interrogator and retrodirective antenna array. The link is realized by using standard time-domain modulation for data uplink to the retrodirective array, while outgoing data is coded onto the antenna polarization sense of the signal sent back to the interrogator. Using these noninterfering mutually exclusive modulations schemes, this system architecture is able to resolve the difficulty of dealing with the corruption of the outgoing retrodirected signal by the incoming interrogation signal inherent when using phase-conjugation mixers (PCMs). This paper will discuss the development of a novel PCM also used for polarization modulation and a polarization state detector for demodulation. Analysis of circuit design tolerances and affects of jammers on proper polarization detection is also shown. Demonstration of simultaneous data transfer is presented in simulation and measurement along with the array's automatic beam-steering ability.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:53 ,  Issue: 12 )

Date of Publication:

Dec. 2005

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