ETRI Journal

  • 제33권6호
  • /
  • Pages.961-964
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  • 2011
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  • 1225-6463(pISSN)
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  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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Enhanced FCME Thresholding for Wavelet-Based Cognitive UWB over Fading Channels

  • 투고 : 2011.02.06
  • 심사 : 2011.04.25
  • 발행 : 2011.12.31
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초록

The cognitive ultra-wideband (UWB) network detects interfering narrowband systems and adapts its configuration accordingly. An inherently adaptive and flexible candidate for cognitive UWB transmission is the wavelet packet multicarrier modulation (WPMCM). In this letter, we use an enhanced forward consecutive mean excision thresholding algorithm to tackle the noise uncertainty in the wavelet-based sensing of WPMCM systems, and mathematical analysis is performed for primary user channel fading. As a benchmark, we compare the proposed system with a conventional fast Fourier transformation-based system, and performance investigation proves significant improvements when primary and secondary links are subjected to multipath fading and noise.

키워드

참고문헌

  1. A.M. Rateb, S.K. Syed-Yusof, and N. Fisal, "Improvement of Ultra-wideband Link Performance over Bands Requiring Interference Mitigation in Korea," ETRI J., vol. 32, no. 1, Feb. 2010, pp. 44-52. https://doi.org/10.4218/etrij.10.0109.0218
  2. H. Hosseini, N.B. Fisal, and S.K. Syed-Yusof, "Wavelet Packet Based Multicarrier Modulation for Cognitive UWB Systems," SPIJ J., vol. 4, no. 2, May 2010, pp. 75-84.
  3. Y.C. Liang et al., "Sensing-Throughput Tradeoff for Cognitive Radio Networks," ICC, Glasgow, 2007, pp. 5330-5335.
  4. D.D. Ariananda, M.K. Lakshmanan, and H. Nikookar, "A Study on the Application of Wavelet Packet Transforms to Cognitive Radio Spectrum Estimation," CrownCom, June 2009, pp. 1-6.
  5. J. Lehtomaki et al., "CFAR Outlier Detection with Forward Methods," IEEE Trans. Signal Process., vol. 55, no. 9, Sept. 2007, pp. 4702-4706. https://doi.org/10.1109/TSP.2007.896239
  6. O. Rioul and P. Duhamel, "A Remez Exchange Algorithm for Orthonormal Wavelets," IEEE Trans. Circuits Syst. II, vol. 41, no. 8, Aug. 1994, pp. 550-560.

피인용 문헌

  1. Wavelet Packet-Based Transceiver for Cognitive UWBÉmetteur-récepteurà base de paquet d'ondelette pour les applications cognitives UWB vol.37, pp.2, 2011, https://doi.org/10.1109/cjece.2014.2312451
  2. Compressed Wavelet Packet-Based Spectrum Sensing With Adaptive Thresholding for Cognitive Radio vol.38, pp.1, 2011, https://doi.org/10.1109/cjece.2014.2355916
  3. Cooperative Spectrum Sensing for Cognitive Heterogeneous Networking Using Iterative Gauss-Seidel Process vol.11, pp.12, 2011, https://doi.org/10.1155/2015/319164