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http://dx.doi.org/10.6109/jkiice.2010.14.12.2791

Low Computational Algorithm for Estimating LLR in MIMO Channel  

Park, Tae-Doo (한국해양대학교 전파공학과)
Kim, Min-Hyuk (한국해양대학교 전파공학과)
Kim, Chul-Sung (한국해양대학교 전파공학과)
Jung, Ji-Won (한국해양대학교 전파공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.14, no.12, 2010 , pp. 2791-2797 More about this Journal
Abstract
In recent years, the goal of providing high speed wireless data services has generated a great amount of interest among the research community. Several researchers have shown that the capacity of the system, in the presence of flat Rayleigh fading, improves significantly with the use of combined MIMO and LDPC. To feed the soft values to LDPC decoder, the soft values must be calculated from multiple transmitter and receiver antennas in Rayleigh fading channel. It requires high computational complexity to get the soft symbols by increasing number of transmitter and receiver antennas. Therefore, this thesis proposed on effective algorithm for calculation of soft values from multiple antennas based on LLR. As result, This thesis shows that maximum 61% of computational complexity is reduced with a little loss of performance.
Keywords
MIMO; low density parity check code; log-likelihood computation; space time code;
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  • Reference
1 V. Tarokh, N. Seshadri, and A. R. calderbank, "Space-time codes for high data rate wiress communication: performance criterion and code construction," IEEE Trans. Inform. Theory, pp.744-765, Mar. 1998.
2 T. Richardson, A. Shokrollahi, and R. Urbrake, "Design of Provably Good Low-Density Parity Check Codes," IEEE Trans. Inform. Theory, Vol. 47, No. 2, pp. 599-618 Feb. 2001.   DOI   ScienceOn
3 ETSI EN 302 707 ver. 1.1.1, "Digital Video Broadcasting(DVB); Second generation framing structure, channel coding and modulation systems for Broadcasting Interactive Services, News Gathering and other broadband satellite applications," ETSI, June. 2004.
4 G. J. Foschini, Jr. and M. j. Gans, "On limits of wireless communication in a fading environment when wsing multiple antenas," Wireless Personal Communication, Mar. 1998.
5 G. J. Foschini, G.D. Golden, R.A. Valenzuela, P.W. Wolniansky, "Simplified processing for high spectral efficiency wireless communication employing multi-element arrays", IEEE Journal on Selected Areas in Communications, vol. 17, no.11, p. 1841-52, Nov. 1999.   DOI   ScienceOn
6 R. G. Gallager, "Low-Density Parity-Check Codes," IREtrans. informationPP.21-28,1962.