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A multi-carrier communication technique for interference-free spectrum sharing in cognitive radios

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1 Author(s)
Wylie-Green, M.P. ; Nokia Siemens Networks, Irving, TX

Future cognitive radio systems are envisioned to accommodate multiple users that are able to co-exist without causing harmful interference to each other. In this paper, we introduce a new modulation scheme, based on Single-Carrier FDMA (SC-FDMA) and Orthogonal FDMA (OFDMA), which enables interference-free spectrum sharing between radios that operate over different air interfaces. The basis of our approach is that non-OFDM signals can be sampled and the resulting data samples can be used as the dasiadata symbolspsila for an SC-FDMA style transmission.The concept is demonstrated by showing that a CPM-based radio and a conventional SC-FDMA radio can transmit over the same shared channel without interfering and thus without suffering any loss in performance.

Published in:

Waveform Diversity and Design Conference, 2009 International

Date of Conference:

8-13 Feb. 2009