A Novel "Single-Path" vs. "Few-Path" Test Based on Higher Order Statistics to Possibly Start-Up Coherent Combining

 

F. Benedetto*, G. Giunta and E. Guzzon

 

Signal Processing for Telecommunications and Economics (SP4TE) Lab University of ROMA TRE, via Vito Volterra 62 00146 Rome, Italy. * francesco.benedetto@uniroma3.it

 

ABSTRACT

This paper focuses on an innovative hypothesis test for discrimination of wireless mobile channels based on higher order statistics to possibly start-up coherent combining. We have devised a new testing procedure, namely the Rakeness test, that statistically measures how much the series under investigation (amplitude samples of matched filter receiver's output) fits Rice vs. non-Rice models. This is equivalent to discriminate between the cases of a channel with one single dominant path (strong propagation), or with few dominant paths (weak propagation). Then, mathematical expressions for the bias and variance of the new testing variable are derived, by a 3-D reduced Taylor's expansion up to the second order. The achieved results, obtained throughout theory and simulations, evidence the robustness of this innovative test. Our test can hence be used as a preliminary signal processing method to decide if simpler choices (i.e. matched filters) or cumbersome coherent combining strategies (i.e. Rake receivers) can be effectively implemented at the receiver's side.

Keywords: Wireless channel modeling, Hypothesis testing, Higher order statistics, Coherent combining, Rake receiver.

 

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References

[1] A. Molisch, Channel Models, in Wireless Communications, pp. 125 - 143, 2011.         [ Links ]

[2] S. Draganov et al., "Synthetic aperture navigation in multipath environments", IEEE Wireless Commun., vol. 18, no. 2, pp. 52 - 58, 2011.         [ Links ]

[3] D. Hill, "Indoor Wireless Propagation", in Electromagnetic Fields in Cavities: Deterministic and Statistical Theories, pp. 203 - 230, 2009.         [ Links ]

[4] F. Tsai et al., "A positioning scheme combining location tracking with vision assisting for wireless sensor networks", J. of Applied Research and Techn. (JART), vol. 11, no. 2, pp. 292-300, 2013.         [ Links ]

[5] G. Sun et al., "Signal processing techniques in network-aided positioning", IEEE Sign. Proc. Mag., vol. 22, issue 4, pp. 12-23, July 2005.         [ Links ]

[6] W. Xu, et al., "Non-line-of-sight identification via phase difference statistics across two-antenna elements", IET Commun., vol.5, no. 13, pp. 1814 -1822, 2011.         [ Links ]

[7] F. Benedetto et al., "Dynamic LOS/NLOS Statistical Discrimination of Wireless Mobile Channels ", in Proc. of the 2007 IEEE 65th Vehicular Technology Conf. VTC2007 Spring, 23-25 Apr. 2007.         [ Links ]

[8] V. M. Vergara and S. E. Barbin, "LOS and NLOS capacity components in MIMO Rice fading channels", in Proc. of the 2010 Asia-Pacific Proc. of Microwave Conf., pp. 1589 - 1592, 2010.         [ Links ]

[9] A. Annamalai et al., "Analysis of Generalized Selection Diversity Systems in Wireless Channels", IEEE Trans. on Vehic. Techn., vol. 55, no. 6, pp. 1765 - 1775, 2006.         [ Links ]

[10] J. MinChul et al., "Opportunistic Source/Destination Cooperation in Cooperative Diversity Networks", IEEE Trans. on Wireless Commun., vol. 9, no. 12, pp. 3822 -3837, 2010.         [ Links ]

[11] A.E.-S. El-Mahdy, "Adaptive generalised selection-combining receiver over time-varying mobile communication channel", IET Sign. Proc., vol. 6, no. 1, pp. 64-71, 2012.         [ Links ]

[12] F. Benedetto et al., "A Rakeness Test for Coherent Signal Combining in Mobile Receivers", in Proc. of the 2013 36th Int. Conf. on Telecommunications and Signal Processing (TSP), pp. 47-51, July 2013.         [ Links ]

[13] F. Benedetto et al., "LOS/NLOS detection by the normalized Rayleighness test", in Proc. of the 17th European Signal Processing Conference, EUSIPCO 2009, Glasgow (Scotland), 2009.         [ Links ]

[14] K. Yu and Y. J. Guo, "Statistical NLOS Identification Based on AOA, TOA, and Signal Strength", IEEE Trans. on Vehic, Techn., vol. 58, no. 1, pp. 274 - 286, 2009.         [ Links ]

[15] J. Yan et al., "Non-Line-of-Sight Identification for Indoor Positioning Using Ultra-WideBand Radio Signals", Navigation, vol. 60, no. 2, pp 97-111, 2013.         [ Links ]

[16] R. Tamayo-Fernández et al., "An architecture for design and planning of mobile television networks", J. of Applied Research and Techn. (JART), vol. 9, no. 3, pp. 277-290, 2011.         [ Links ]

[17] J. Penttinen et al., "The DVB-H Handbook: The Functioning and Planning of Mobile TV", Wiley-Blackwell, 2009.         [ Links ]

[18] C.-H. Hsu and M. Hefeeda, "Flexible Broadcasting of Scalable VideoStreams to Heterogeneous Mobile Devices", IEEE Trans. on Mobile Computing, vol. 10, no. 3, pp. 406-418, March 2011.         [ Links ]

[19] F. Babich and G. Lombardi, "Statistical analysis and characterization of the indoor propagation channel", IEEE Trans. on Commun., vol. 48, no. 3, pp. 455 - 464, 2000.         [ Links ]

[20] F. Benedetto et al., "A Blind Equalization Algorithm Based on Minimization of Normalized Variance for DS/CDMA Communications", IEEE Trans. on Vehic. Techn., vol. 57, no. 6, pp. 3453-3461, Nov. 2008.         [ Links ]

[21] G. Giunta and L. Vandendorpe, "A 'Rayleigh-ness' Test for DS/SS Code Acquisition", IEEE Trans. on Commun., vol. 51, no. 9, pp.1492-1501, Sept. 2003.         [ Links ]

[22] G. Giunta, "Fine Estimators of Two-Dimensional Parameters and Application to Spatial Shift Estimation", IEEE Trans. Signal Proc.,vol.47, no.12, pp. 3201-3207, 1999.         [ Links ]

[23] F. Benedetto and G. Giunta, "A self-synchronizing method for asynchronous code acquisition in band-limited spread spectrum communications", IEEE Trans. on Commun., vol. 57, no. 8, pp. 2410-2419, 2009.         [ Links ]

[24] F. Benedetto et al., "Effective Monitoring of Freeloading User in the Presence of Active User in Cognitive Radio Networks", IEEE Trans. on Vehic. Techn., in press, 2013.         [ Links ]

[25] E. Guzzon et al., "A New Test for Initial Code Acquisition of Correlated Cells, IEEE Trans. on Vehic. Techn., vol. 62, no. 5, pp. 2349-2358, 2013.         [ Links ]

[26] F. Benedetto et al., "A Fast Unambiguous Acquisition algorithm for BOC-Modulated Signals", IEEE Trans. on Vehic. Techn., vol. 62, no. 3, pp. 1350-1355, 2013.         [ Links ]

[27] M. Nakagami, "The m-Distribution, a general formula of intensity of rapid fading", in William C. Hoffman, editor, Statistical Methods in Radio Wave Propagation, pp 3-36. Pergamon Press, June 18-20, 1958.         [ Links ]

[28] D. L. Noneaker, M. B. Pursley, "Rake reception for a CDMA mobile communication system with multipath fading", in Proc. of the IEEE 3rd Int. Symp. on Spread Spectrum Techniques and Applications, vol. 1, pp. 98104, 1994.         [ Links ]