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Quantized Channel State Information Feedback Scheme for Multi-carrier Systems  

Seo Hee-Jung (이화여자대학교 정보통신학과 이동통신 연구실)
Kim Seayoung (이화여자대학교 정보통신학과 이동통신 연구실)
Kim Nak-Myeong (이화여자대학교 정보통신학과 이동통신 연구실)
Kim Kiho (삼성종합기술원 Comm. & Network Lab.)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.12A, 2005 , pp. 1146-1152 More about this Journal
Abstract
In this paper, we propose a compressed quantized channel state information (CQCSI) feedback scheme for multi-carrier mobile communication systems. The proposed CQCSI figures out the contiguous subsequences of equal QCSI's as separate types of runs across the subcarriers, and then encodes the types of runs using a truncated Huffman coding algorithm. Computer simulation shows that the proposed algorithm can reduce the QCSI feedback up to one tenth of the uncompressed, while providing a comparable performance with the conventional QCSI feedback schemes. To cope with special cases when the frequency selective fading is very high, we also propose a restricted CQCSI feedback scheme. The restricted CQCSI feedback has been proved under vehicular B channel model.
Keywords
OFDM; multicarrier system; channel state information; CSI feedback; adaptive modulation;
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