Sidelobe suppression in OFDM-based spectrum sharing systems using adaptive symbol transition

Mahmoud H. A., ARSLAN H.

IEEE Communications Letters, cilt.12, sa.2, ss.133-134, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 12 Sayı: 2
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1109/lcomm.2008.071729
  • Dergi Adı: IEEE Communications Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.133-134
  • Anahtar Kelimeler: CR, OFDM, sidelobe suppression
  • İstanbul Medipol Üniversitesi Adresli: Evet

Özet

In this letter, we introduce a new method for orthogonal frequency division multiplexing (OFDM) sidelobe suppression. An extension is added to OFDM symbols that is calculated using optimization methods to minimize adjacent channel interference (ACI) while keeping the extension power at an acceptable level. Using this technique, interference to adjacent signals is reduced significantly at the cost of a small decrease in the useful symbol energy. The proposed method can be used by cognitive radio (CR) systems to shape the spectrum of OFDM signals and to minimize interference to licensed users (LU), or to reduce the size of guard bands used in conventional OFDM systems. © 2008 IEEE.