Adaptive Bit Allocation for OFDM Cognitive Radio Systems with Imperfect Channel Estimation

Ebrahim Bedeer Mohamed, Mohammed Marey, Octavia A. Dobre, Kareem E. Baddour

Research output: Contribution to journalConference article

5 Citations (Scopus)
11 Downloads (Pure)

Abstract

Cognitive radios hold tremendous promise for increasing the spectral efficiency of wireless communication systems. In this paper, an adaptive bit allocation algorithm is presented for orthogonal frequency division multiplexing (OFDM) CR systems operating in a frequency selective fading environment. The algorithm maximizes the CR system throughput in the presence of narrowband interference, while guaranteeing a BER below a predefined threshold. The effect of imperfect channel estimation on the algorithm's performance is also studied.
Original languageEnglish
Journal2012 IEEE Radio and Wireless Symposium
DOIs
Publication statusPublished - 3 Apr 2012
Event2012 IEEE Radio and Wireless Symposium - Santa Clara, United States
Duration: 15 Jan 201218 Jan 2012

Keywords

  • OFDM
  • bit error rate
  • throughput
  • channel estimation
  • interference

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