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A New Reduction Method of the Uplink Information for an Adaptive Modulation and Coding OFDM/FDD System  

장일순 (한국전자통신연구원 광대역무선MAC연구팀)
유병한 (한국전자통신연구원 광대역무선MAC연구팀)
조경록 (충북대학교 전기전자공학부 통신회로및시스템연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.29, no.2A, 2004 , pp. 140-146 More about this Journal
Abstract
In this paper we proposed the reducing method of feedback information for transmitting of adaptable data rate in multi-user OFDMA/FDD systems. In order to transmit downlink channel information to Base-Station(BS) through the limited uplink control channel, the proposed algorithm exploits the channel variation level which describes the similarity among the adjacent clusters and uses just one modulation and coding scheme(MCS) level representing channel information of all clusters'. We investigated the performance in single cell environment. It has a similar overhead for feedback information with conventional algorithm and has better performance in that bandwidth efficiency and outage probability than the conventional algorithms.
Keywords
OFDM; AMC; CVL;
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