Cognitive Radio --- A Current Snapshot and Some Thoughts on Commercialization for Future Cellular Systems

  • Authors:

  • Thomas Kaiser;Hanwen Cao;Wei Jiang;Feng Zheng

  • Affiliations:

  • Institute of Digital Signal Processing (DSV), University of Duisburg-Essen (UDE), Duisburg, Germany;Institute of Digital Signal Processing (DSV), University of Duisburg-Essen (UDE), Duisburg, Germany;Institute of Digital Signal Processing (DSV), University of Duisburg-Essen (UDE), Duisburg, Germany;Institute of Digital Signal Processing (DSV), University of Duisburg-Essen (UDE), Duisburg, Germany

  • Venue:
  • Journal of Signal Processing Systems
  • Year:
  • 2013

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Abstract

Cognitive Radio (CR) has received tremendous interest during the past decade from almost all research disciplines in wireless communications. Meanwhile, companies across the world in the value chain are showing more and more interest in CR. This is due to the expected significant scarcity of spectrum caused by data-consuming modern smartphones or similar mobile devices. However, partly conflicting interests and severe technical challenges remain for a successful commercialization of CR ideas, in particular for Long-Term Evolution (LTE) cellular systems. The aims of this survey are as follows: 1) we try to limit the various physical parameters (e.g. the carrier frequency range, the cell size) being relevant for cognitive cellular systems either in qualitative or in quantitative terms, 2) a conceptual approach for a performance bound being of practical relevance will be pointed out, 3) different players in the value chain of cellular systems and potential conflict of interests will be discussed, 4) the technical state-of-the-art CR and the remaining major challenges will be highlighted, 5) a current snapshot about the quickly evolving area of regulation and standardization will be provided. Finally, some products, services and prototypes for CR will be presented.