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Cognitive radio network with dirty paper coding for Concurrent access of spectrum by primary and secondary users

Author Affiliations

  • 1Department of Computer and Electronics and Communication Engineering, Kathford International College of Engineering and Management, IOE, Balkumari, Lalitpur, Tribhuvan University, NEPAL
  • 2Department of Electronics and Computer Engineering, IOE, Central Campus, Pulchowk, Lalitpur, Tribhuvan University, NEPAL

Res. J. Engineering Sci., Volume 4, Issue (9), Pages 1-7, September,26 (2015)


In the current architecture of dynamic spectrum access, also called as opportunistic spectrum co access, secondary user can only access the spectrum when there is no existence of primary carrier. The resurgence of primary user compels the secondary user to left the spectrum such that the communication of primary user shall not get disturbed. However, this disrupts the secondary user resulting the poor Quality of Service of secondary users. In this paper, a special architecture for concurrent spectrum access, termed as Dynamic Spectrum Co-Access (DSCA) is developed, to enable primary user as well as secondary user to simultaneously access licensed spectrum. With DSCA, secondary users transparently incentivize primary users by giving some of secondary’s power to relay codeword of primary user, which increases primary user signal to noise ratio i.e. performance , and secondary users can also access spectrum simultaneously with primary users. This is realized by using the special pre coding techniques called Dirty Paper Coding (DPC) to preserve signal over the interference. For that, a mathematical model is formulated to determine the minimum incentives for the spectrum co-access, computational analysis of region of co-access is done to determine where the secondary users that can co-access with a given primary user.


  1. Sun S., Ju Y. and YamaoY., Overlay cognitive radio OFDM system for 4G cellular networks, IEEE Wireless Communications, 20(2), 68–73 (2013)
  2. GoldsmithA., Jafar S.A., Maric I. and Srinivasa S., Breaking spectrum gridlock with cognitive radios: An information theoretic perspective, Proceedings of the IEEE, 97(5), 894–914 (2011)
  3. Xin C., Song M., Ma L., Hsieh G. and Shen C.C., An incentivized cooperative architecture for dynamic spectrum access networks, IEEE Wireless Communications, 12(10), 5154–5161 (2013)
  4. Mitola J., Cognitive radio, Licentiate Proposal, KTH, Stockholm, Sweden (1998)
  5. Pan M., Zhang C., Li P. and Fang Y., Joint routing and link scheduling for cognitive radio networks under uncertain spectrum supply, IEEE INFOCOM, 2237–2245 (2011)
  6. Liu Y., Cai L.X. and Shen X., Spectrum-aware opportunistic routing in multi-hop cognitive radio networks, IEEE Journal on Selected Areas in Communications, 30(10), 1958–1968 (2012)
  7. Zhang Y., Li Q., Yu G. and Wang B., Etch: efficient channel hopping for communication Rendezvous in dynamic spectrum access networks, IEEE INFOCOM , 2471–2479 (2011)
  8. Zhao Q. and Sadler B.M., A survey of dynamic spectrum access, IEEE Signal Processing Magazine, 24(3), 79–89 (2007)
  9. Kolodzy P.J., Cognitive radio fundamentals, SDR Forum, Singapore, (2005)
  10. Zhang R. and Liang Y.C., Exploiting multi-antennas for opportunistic spectrum sharing in cognitive radio networks, IEEE Journal of Selected Topics in Signal Processing, 2(1), 88–102 (2008)
  11. Devroye N., Mitran P., Sharif M., Ghassemzadwh S. and Tarokh V., In-formation theoretic analysis of cognitive radio systems, Springer Cognitive Wireless Communications, 45–78 (2007)
  12. Devroye N., Mitran P. and Tarokh V., Cognitive multiple access networks, IEEE International Symposium on Information Theory, 57–61 (2005)
  13. Shin K. G., Kim H., Min A.W. and Kumar A., Cognitive radios for dynamic spectrum access: from concept to reality, IEEE Wireless Communications, 17(6), 64–74 (2010)
  14. Song M., Xin C., Zhao Y. and Cheng X., Dynamic spectrum access: from cognitive radio to network radio, IEEE Wireless Communications, 19(1), 23–29 (2012)
  15. Costa M.H.M., Writing on dirty paper (corresp.), IEEE Transaction on Information Theory, 29(3), 439–441 (1983)
  16. Guan X., Cai Y., Sheng Y. and Yang W., Exploiting primary retransmission to improve secondary throughput by cognitive relaying with best-relay selection, IET Communications, 6(12), 1769–1780 (2012)
  17. Shahmohammadi M., Koyluoglu O.O., Khattab T.M.S., and Gamal E.H., Joint interference cancellation and dirty paper coding for cogvntive cellular networks,IEEE Wireless Communications and Networking Conference (WCNC), 1972–1976 (2011)
  18. Zhang R., and Liang Y. C., Investigation on multiuser diversity in spectrum sharing based cognitive radio networks, IEEE Communication Letters, 14(2), 133–135 (2010)
  19. Cover T., Broadcast channels, IEEE transaction on Information Theory, 18(1), 2–14 (1972)