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Resource allocation using fragmented-spectrum synchronous OFDM-CDMA in cognitive radio networks

Akhoondi, F ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/IWCIT.2014.6842483
  3. Abstract:
  4. This paper presents a fragmented-spectrum synchronous OFDM-CDMA modulation and utilize it as secondary users modulation in a cognitive radio-based network to provide high data rate by efficiently exploiting available spectrum bands in a target spectral range while simultaneously offering multiple-access capability. In particular, given preexisting communications in the spectrum where the system is operating, a channel sensing and estimation method is used to obtain information of subcarrier availability. Given this information, some three-level codes are provided for emerging new cognitive radio users. Furthermore, analytical results of the system performance in a typical cognitive radio network are shown
  5. Keywords:
  6. Cognitive radio ; Communication ; Information theory ; Modulation ; Orthogonal frequency division multiplexing ; Analytical results ; Channel sensing ; Cognitive radio network ; Estimation methods ; Fragmented-spectrum ; Multi carrier ; Multiple access ; Secondary users ; Code division multiple access
  7. Source: IWCIT 2014 - Iran Workshop on Communication and Information Theory ; May , 2014 ; ISBN: 9781479948772
  8. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6842483