JOURNAL OF COMMUNICATIONS (JCM)
ISSN : 1796-2021
Volume : 2    Issue : 2    Date : March 2007

Petri Net Based Controller Concept For Cognitive Radios in Wireless Access Networks
Alexander Viessmann, Admir Burnic, Christoph Spiegel, Guido H. Bruck, and Peter Jung
Page(s): 29-38
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Abstract
This paper will give a detailed discussion about the authors view on Software Defined and Cognitive
Radio. After an introduction on different aspects of software radio and a novel approach on cognitive
radio is presented. As proof of concept a software defined cognitive radio demonstrator termed
Falcon was built up which is described afterwards. The Falcon is entirely based on a modular
signal processing concept. In particular, the receiver deploys modules which process and generate
log-likelihood ratio (LLR) signals, hence, providing the capability of a plug-and-play-type
reconfigurability. To the best knowledge of the authors, such a reconfigurability approach has not yet
been pursued as consequently before.

Index Terms
Software Defined Radio (SDR), Cognitive Radio (CR), Controller Concept, Petri Net,
Reconfigurability