ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
권호 표지
DOI QR코드

DOI QR Code

Improvement of Ultra-wideband Link Performance over Bands Requiring Interference Mitigation in Korea

  • Rateb, Ahmad M. (Telecommunications Research Group, Faculty of Electrical Engineering, Universiti Teknologi Malaysia) ;
  • Syed-Yusof, Syarifah Kamilah (Telecommunications Research Group, Faculty of Electrical Engineering, Universiti Teknologi Malaysia) ;
  • Fisal, Norsheila (Telecommunications Research Group, Faculty of Electrical Engineering, Universiti Teknologi Malaysia)
  • Received : 2009.04.12
  • Accepted : 2009.08.12
  • Published : 2010.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

Ultra-wideband (UWB) systems have witnessed a debate over whether they may cause interference to other existing and future narrowband systems sharing their band of operation. The detect and avoid (DAA) mechanism was developed as a solution to reduce interference to narrowband systems in order to ease regulatory concerns. It works by adaptively reducing the transmitted power at the overlapping bands upon detecting an active narrowband link. However, employing DAA degrades the performance of UWB transmissions. In this paper, we present the Korean UWB regulations as an example of regulations that require DAA in certain bands. We investigate DAA's impact on performance and propose a method to mitigate it, which provides UWB with the more efficient support of the DAA mechanism and enables it to avoid a larger number of narrowband users while sustaining the data rate. Results show significant improvement in performance with the application of our technique compared to conventional performance.

Keywords

References

  1. R. Aiello and A. Batra, Ultra Wideband Systems: Technology and Applications, Elsevier, 2006.
  2. S.S.M Wong and F.C. Lau, "Impacts of UWB Interference on Selected Radio Systems Used by the Government," Proc. 4th IEEE Int. Conf. Circuits and Systems for Communications, ICCSC, May 2008, pp. 525-529.
  3. S.M. Mishra et al., "Detect and Avoid: An Ultra-Wideband/WiMax Coexistence Mechanism," IEEE Communications Magazine, vol. 45, no. 6, June 2007, pp. 68-75.
  4. ECMA International Standard ECMA-368, High Rate Ultra Wideband PHY and MAC Standard, 3rd ed., Dec. 2008.
  5. http://wimedia.org/en/index.asp
  6. C.J. Kim et al., "Policy and Technology of Dynamic Spectrum Access in Korea," Proc. CrownCom, May 2008, pp. 1-4.
  7. http://www.usb.org/developers/wusb/
  8. http://www.bluetooth.com/Bluetooth/Technology/Technology_Transfer.htm
  9. Anuj Batra et al., Multiband OFDM Physical Layer Proposal for IEEE 802.15 Task Group 3a, IEEE P802.15-03/268r3, Mar. 2004.
  10. A. Batra and J. Balakrishnan, "Improvements to the Multi-band OFDM Physical Layer," Proc. 3rd IEEE Consumer Communications and Networking Conference, vol. 2, Jan. 2006, p. 701.
  11. S.M. Mishra et al., "Cognitive Technology for Ultra-Wideband/WiMax Coexistence," Proc. 2nd IEEE Int. Symp. New Frontiers in Dynamic Spectrum Access Networks, DySPAN 2007, Apr. 2007, p. 179.
  12. S. Brandes, I. Cosovic, and M. Schnell, "Reduction of Out-of-Band Radiation in OFDM-Based Overlay Systems," Proc. First IEEE Int. Symp. New Frontiers in Dynamic Spectrum Access Networks, DySPAN, 2005, P. 662.
  13. F. Molisch, J.R. Foerester, and M. Pendergrass, "Channel Models for Ultrawideband Personal Area Networks," IEEE J. Wireless Communications, vol. 10, no. 6, Dec. 2003, pp. 14-21. https://doi.org/10.1109/MWC.2003.1265848
  14. J. Foerster, Channel Modeling Sub-committee Report (Final), IEEE P802.15- 02/368r5-SG3a, Nov. 2002.

Cited by

  1. QoS-Guaranteed Slot Allocation Algorithm for Efficient Medium Access in HR-WPAN vol.37, pp.6, 2010, https://doi.org/10.4218/etrij.15.0115.0299