Revisiting active cancellation carriers for shaping the spectrum of OFDM-based cognitive radios

Mahmoud S. El-Saadany, Ahmed F. Shalash, Mohamed Abdallah

Research output: Chapter in Book/Report/Conference proceedingConference contribution

26 Citations (Scopus)

Abstract

Orthogonal frequency division multiplexing (OFDM) is widely used in wireless communication systems, and it is a candidate for Cognitive Radios (CR). Shaping the spectrum of OFDM-based CR is needed to reduce the out-of-band radiations and reduce the interference delivered to the licensed user (LU). In this paper, shaping the spectrum using windowing and active cancellation carriers is discussed. It is shown that the use of windowing alone for large band is a better choice. The window choice in case of large number of subcarriers spanned by a LU is investigated and it is shown that the Hanning window outperforms the raised cosine window by 7dB. Computational complexity analysis is introduced and it shows a huge advantage by using windowing alone for large frequency bands and multiple bands vis-à-vis cancellation carriers. Simulations show that such technique offers no effect on the bit error rate performance.

Original languageEnglish
Title of host publication2009 IEEE Sarnoff Symposium, SARNOFF 2009 - Conference Proceedings
DOIs
Publication statusPublished - 2009
Externally publishedYes
Event2009 IEEE Sarnoff Symposium, SARNOFF 2009 - Princeton, NJ, United States
Duration: 30 Mar 20091 Apr 2009

Other

Other2009 IEEE Sarnoff Symposium, SARNOFF 2009
CountryUnited States
CityPrinceton, NJ
Period30/3/091/4/09

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ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Communication

Cite this

El-Saadany, M. S., Shalash, A. F., & Abdallah, M. (2009). Revisiting active cancellation carriers for shaping the spectrum of OFDM-based cognitive radios. In 2009 IEEE Sarnoff Symposium, SARNOFF 2009 - Conference Proceedings [4850359] https://doi.org/10.1109/SARNOF.2009.4850359