Sutton, P.D., Nolan, K.E., Doyle, L.E. ‘Cyclostationary signatures for rendezvous in OFDM-based dynamic spectrum access networks’ in Proceedings of the 2nd IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, Dublin, Ireland, 17-20 April, 4221499, IEEE, 2007, pp 220-231
Abstract—Distributed coordination of operating frequencies
and bandwidths is one of the key challenges in the development
of dynamic spectrum access (DSA) technology. The spectrum
efficiency of DSA networks is achieved through the use of
spectrum white spaces, frequency bands which are unoccupied at
a given time and place. The issue of frequency rendezvous arises
as the availability of these white spaces may change dynamically
in frequency, time and space.
We propose a novel solution to the problem of distributed
rendezvous in dynamic spectrum access networks using cyclostationary
signatures. By embedding a cyclostationary signature or
watermark in a transmitted signal, the received signal can be
uniquely detected, classified, and used for frequency acquisition
by distributed dynamic spectrum access-enabled nodes in a
network. This paper therefore makes three key contributions.
First, a solution to the problem of distributed rendezvous in DSA
networks using the novel concept of cyclostationary signatures
is presented. Second, a low-complexity technique for generating
these cyclostationary signatures in OFDM (orthogonal frequency
division multiplexing) waveforms is described. Finally, an initial
performance analysis of an implemented test platform is discussed.
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