OFDM for cognitive radio: Merits and challenges

Mahmoud H., Yücek T., ARSLAN H.

IEEE Wireless Communications, cilt.16, sa.2, ss.6-14, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 16 Sayı: 2
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1109/mwc.2009.4907554
  • Dergi Adı: IEEE Wireless Communications
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.6-14
  • İstanbul Medipol Üniversitesi Adresli: Evet

Özet

Cognitive radio is a novel concept that enables wireless systems to sense the environment, adapt, and learn from previous experience to improve the quality of the communication. However, CR requires a flexible and adaptive physical layer in order to perform the required tasks efficiently. In this article, CR systems and their requirement of a physical layer are discussed, and the orthogonal frequency division multiplexing technique is investigated as a candidate transmission technology for CR. The challenges that arise from employing OFDM in CR systems are identified. The cognitive properties of some OFDM-based wireless standards also are discussed to indicate the trend toward a more cognitive radio. © 2006 IEEE.