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http://dx.doi.org/10.9709/JKSS.2011.20.4.091

Performance Analysis of MMSE-Based Equalization of IMT-Advanced System in Time-Varing Channels  

Park, Sung-Joon (강릉원주대학교 전자공학과)
Publication Information
Journal of the Korea Society for Simulation / v.20, no.4, 2011 , pp. 91-96 More about this Journal
Abstract
As the user's demand for ultra high-speed wireless internet has increased, the standardization, research and development of future mobile communication systems have been done for several years. IMT-Advanced system which is called fourth generation mobile communication should support the data rate of 1 Gbps for nomadic users and 100 Mbps for mobile users. Also, the system should hold call connection at the mobile speed of 350 km/h. Meanwhile, since Doppler spread is linearly proportional to mobile speed, high mobility leads to the increase of interference between subcarriers and the deterioration of detection performance consequently. In this paper, we evaluate and analyze detection probability with respect to equalization methods in time-varying channels under system parameters complying with IMT-Advanced requirements. According to computer simulation conducted by varying mobile speed and code rate, MMSE based equalization can mitigate performance degradation of IMT-Advanced system considerably in time-varying channels.
Keywords
Fourth Generation Mobile Communication; IMT-Advanced; OFDM; Time-Varying Channel; One-Tap Equalization; MMSE Equalization;
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  • Reference
1 ITU-R WP8F (2008), Report ITU-R M.2134.
2 ITU-R WP5D (2009), Report ITU-R M.2135-1.
3 3GPP, http://www.3gpp.org
4 IEEE 802.16, http://www.ieee802.org/16/tgm
5 Goldsmith, A. (2005), Wireless Communications, 1st Edition, Cambridge University Press, New York, pp. 374-402.
6 Jeon, W. G., Chang, K. H. and Cho, Y. S. (1999), "An Equalization Technique for Orthogonal Frequency-Division Multiplexing Systems in Time-Varying Multipath Channels", IEEE Tr. Communications, Vol. 47, No. 1, pp. 27-32.   DOI   ScienceOn
7 Schniter, P. (2004), "Low-Complexity Equalization of OFDM in Doubly-Selective Channels", IEEE Trans. Signal Processing, Vol. 52, No. 4, pp. 1002-1011.   DOI   ScienceOn
8 Rugini, L., Banelli, P. and Leus, G. (2005), "Simple Equalization of Time-Varying Channels for OFDM," IEEE Communications Letters, Vol. 9, No. 7, pp. 619-621.   DOI   ScienceOn
9 Rugini, L., Banelli, P. and Leus, G. (2006), "Low- Complexity Banded Equalizers for OFDM Systems in Doppler Spread Channels," EURASIP J. Applied Signal Processing, Vol. 2006, Article ID 67404, pp. 1-13.
10 Poor, H. V. (1994), An Introduction to Signal Detection and Estimation, 2nd Edition, Springer-Verlag, New York, pp. 221-229.
11 Jakes, W. C. (1974), Microwave Mobile Communications, John Wiley and Sons, New York.
12 ITU-R (1997), Report ITU-R M.1225, "Guideline for Evaluation of Radio Transmission Technologies for IMT-2000".