Link adaptation based on adaptive modulation and coding for multiple-antenna OFDM system

Authors:
Peng Tan;Yan Wu;Sumei Sun
Affiliations:
Inst. for Infocomm Res., Singapore;-;-
Venue:
IEEE Journal on Selected Areas in Communications
Year:
2008

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Abstract

In this paper, we study the problem of link adaptation based on adaptive modulation and coding for multiple antenna OFDM system in slow fading channel. Based on the extrinsic information transfer analysis, we give an accurate packet error rate prediction with channel estimation errors. This method uses Gaussian approximation to characterize the output of the detector and decoder. We also discuss approaches for searching and selecting the best modulation and coding scheme for the link adaptation algorithm. Finally, the performance of the proposed link adaptation algorithm is studied for the IEEE 802.11n multiple-antenna OFDM system. Good system throughput are achieved using the proposed method, compared to the SNR based algorithm.