A Simple Bit Allocation Scheme Based on Grouped Sub-Channels for V-BLAST OFDM Systems 


Vol. 31,  No. 7, pp. 680-690, Jul.  2006


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  Abstract

In this paper, we present a bit allocation scheme based on grouped sub-channels for MIMO-OFDM (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) systems using V-BLAST (Vertical-Bell laboratories LAyered Space-Time) detector. A fully adaptive modulation and coding scheme may provide optimal performance in the MIMO-OFDM systems, however it requires excessive feedback information. Instead, SBA (Simplified Bit Allocation) scheme for reduction of feedback overhead, which applies the same modulation and coding to all the good sub-channels, may be considered. The proposed scheme in this paper named SBA-GS (Simplified Bit Allocation based on Grouped Sub-channels) groups sub-channels and assigns the same modulation and coding to the set of selected sub-channel groups. Simulation results show that the proposed scheme achieves comparable bit error rate performance of the convnetional SBA scheme, while significantly reducing the feedback overhead in multipath channels with small delay spreads.

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  Cite this article

[IEEE Style]

D. Park, S. Yang, J. Kim, M. Yoo, W. Lee, Y. Shin, "A Simple Bit Allocation Scheme Based on Grouped Sub-Channels for V-BLAST OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 7, pp. 680-690, 2006. DOI: .

[ACM Style]

Daejin Park, Suckchel Yang, Jongwon Kim, Myungsik Yoo, Woncheol Lee, and Yoan Shin. 2006. A Simple Bit Allocation Scheme Based on Grouped Sub-Channels for V-BLAST OFDM Systems. The Journal of Korean Institute of Communications and Information Sciences, 31, 7, (2006), 680-690. DOI: .

[KICS Style]

Daejin Park, Suckchel Yang, Jongwon Kim, Myungsik Yoo, Woncheol Lee, Yoan Shin, "A Simple Bit Allocation Scheme Based on Grouped Sub-Channels for V-BLAST OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 7, pp. 680-690, 7. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880