Improved Soft-Decision Technique with Channel State Information in MB-OFDM System with DCM 


Vol. 32,  No. 5, pp. 467-474, May  2007


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  Abstract

MB-OFDM (Multiband-orthogonal frequency division multiplexing) UWB (ultra wide band) system uses DCM(dual carrier modulation) scheme to achieve high-data rate transmission. The basic idea of DCM is that to transmit the 4 bits more reliably two 16-QAM (quadrature amplitude modulation) symbols are used and the two 16-QAM sysmbols are allocated to each subcarrier of OFDM with maximum-distance. In the case of using the DCM, if one 16-QAM symbol is broken by deep fadding channel, a receiver can detect the transmitted signal by using another 16-QAM symbol. In the conventional ML (maximum likelihood) decision scheme, since the receiver does not use the CSI (channel state inforation), loss in diversity can not be reduced. In this paper, we propose improved soft-decision scheme with CSI for higher performance of MB-OFDM UWB systemn.

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  Cite this article

[IEEE Style]

B. Koo, B. Kang, H. Song, "Improved Soft-Decision Technique with Channel State Information in MB-OFDM System with DCM," The Journal of Korean Institute of Communications and Information Sciences, vol. 32, no. 5, pp. 467-474, 2007. DOI: .

[ACM Style]

Bon-Wook Koo, Byung-Su Kang, and Hyoung-Kyu Song. 2007. Improved Soft-Decision Technique with Channel State Information in MB-OFDM System with DCM. The Journal of Korean Institute of Communications and Information Sciences, 32, 5, (2007), 467-474. DOI: .

[KICS Style]

Bon-Wook Koo, Byung-Su Kang, Hyoung-Kyu Song, "Improved Soft-Decision Technique with Channel State Information in MB-OFDM System with DCM," The Journal of Korean Institute of Communications and Information Sciences, vol. 32, no. 5, pp. 467-474, 5. 2007.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880