IJCNS  Vol.3 No.3 , March 2010
Complex Domain Wavelet-Based Denoising of Measured UHF Wireless Channel Power Delay Profiles
Abstract: This work extends the use of wavelet-based denoising as an alternative processing scheme to improve measured mobile-radio channel power delay profiles. It has already been reported that, when applied on real domain data (amplitude only), denoising provides mainly a qualitative improvement. Here, phase content was also considered, leading to significant qualitative and quantitative improvement of the processed profiles. Signal-to-noise ratios and dynamic ranges improvements as high as 50 dB have been observed.
Cite this paper: nullM. Costa Dias and G. Siqueira, "Complex Domain Wavelet-Based Denoising of Measured UHF Wireless Channel Power Delay Profiles," International Journal of Communications, Network and System Sciences, Vol. 3 No. 3, 2010, pp. 253-255. doi: 10.4236/ijcns.2010.33032.

[1]   T. S. Rappapport, “Wireless communications – Principles & practice,” 2nd Edition, Upper Saddle River, Prentice Hall, 2002.

[2]   E. S. Sousa, V. M. Jovanovic, and C. Daigneault, “Delay spread measurements for the digital cellular in Toronto,” IEEE Transactions on Vehicular Technology, Vol. 43, No. 4, pp. 837–847, November 1994.

[3]   M. H. C. Dias and G. L. Siqueira, “On the use of wavelet-based denoising to improve power delay profile estimates from 1.8 GHz indoor wideband measurements,” Wireless Personal Communications, Vol. 32, No. 2, pp.153–175, January 2005.

[4]   L. H. Macedo, M. H. C. Dias, R. D. Vieira, J. F. Macedo, and G. L. Siqueira, “Mobile indoor wide-band 1.8 GHz sounding: measurement-based time dispersion analysis,” in Proceedings of the IEEE 55th Vehicular Technology Conference - VTC Spring 2002, Birmingham - AL, USA, Vol. 1, pp. 375–379, May 2002.

[5]   D. L. Donoho, “De-noising by soft-thresholding,” IEEE Transactions on Information Theory, Vol. 41, No. 3, pp. 613–627, May 1995.