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Prediction of channel information in multi-user OFDM systems

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dc.contributor.authorJun, Jae-Hoon-
dc.contributor.authorLee, Yong-Hwan-
dc.date.accessioned2009-08-13T03:11:38Z-
dc.date.available2009-08-13T03:11:38Z-
dc.date.issued2006-08-
dc.identifier.citationMWSCAS '06. 49th IEEE International Midwest Symposium on Circuits and Systems, 2006en
dc.identifier.urihttp://mwscas06.uprm.edu-
dc.identifier.urihttp://hdl.handle.net/10371/7108-
dc.description.abstractChannel information is indispensable to employ advanced channel aware technologies such as packet scheduling and adaptive modulation and coding (AMC). In this paper, we first investigate the delay effect of instantaneous signal to interference and noise power ratio (SINR) on the spectral efficiency of multi-user orthogonal frequency division multiplexing (OFDM) systems that employ packet-based channel aware technologies. To alleviate the performance degradation due to delayed channel information, we consider the use of predicted channel gain for link adaptation with packet scheduling. It is shown that the use of predicted channel gain can significantly enhance the spectral efficiency particularly in high mobility environments. For practical realization of an optimum predictor, we propose a grouped minimum mean square error (MMSE) prediction scheme, which can substantially reduce the implementation complexity without noticeable performance degradation. Finally, the proposed scheme is verified by computer simulation.en
dc.language.isoenen
dc.publisherInstitute of Electrical and Electronics Engineers-
dc.subjectchannel state informationen
dc.subjectpacket schedulingen
dc.subjectMMSE predictionen
dc.subjectOFDMen
dc.titlePrediction of channel information in multi-user OFDM systemsen
dc.typeConference Paperen
dc.contributor.AlternativeAuthor전재훈-
dc.contributor.AlternativeAuthor이용환-
dc.identifier.doi10.1109/MWSCAS.2006.382314-
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Others_전기·정보공학부
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