OFDM-IM-Based Spectrum Sharing for Cognitive Radio Networks

Qiang Li, Miaowen Wen, Shuping Dang, Ertugrul Basar, H. Vincent Poor, Fangjiong Chen

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

1 Scopus citations


In this paper, a novel spectrum sharing scheme, based on orthogonal frequency division multiplexing with index modulation (OFDM-IM), is proposed for cognitive radio networks. In the considered model, the primary transmitter communicates with the primary receiver with the aid of an amplify-and-forward (AF) relay by transmitting OFDM-IM signals. Meanwhile, the secondary transmitter passively senses the spectrum and transmits its own information over those inactive subcarriers of the primary network to the secondary receiver. Through the proposed protocol, inactive subcarriers inherent in the existing OFDM-IM systems can be fully exploited, thus improving the spectral efficiency. To evaluate the performance, closed-form upper bounds on the bit error rate (BER) are derived for both users utilizing the optimal maximum-likelihood detection. Simulation results corroborate the analysis and show that the proposed scheme has the potential of outperforming OFDM-IM-AF in terms of BER with higher spectral efficiency.

Original languageEnglish (US)
Title of host publication2019 IEEE 19th International Conference on Communication Technology, ICCT 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Electronic)9781728105352
StatePublished - Oct 2019
Externally publishedYes
Event19th IEEE International Conference on Communication Technology, ICCT 2019 - Xi'an, China
Duration: Oct 16 2019Oct 19 2019

Publication series

NameInternational Conference on Communication Technology Proceedings, ICCT


Conference19th IEEE International Conference on Communication Technology, ICCT 2019

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computer Networks and Communications


  • Amplify-and-forward relaying
  • OFDM
  • cognitive radio
  • index modulation
  • spectrum sharing


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