Adaptive Modulation with Signalling vs. Fixed Modulation for WLAN Systems

Konferenz: European Wireless 2014 - 20th European Wireless Conference
14.05.2014 - 16.05.2014 in Barcelona, Spain

Tagungsband: European Wireless 2014

Seiten: 5Sprache: EnglischTyp: PDF

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Chen, Yun; Oswald, Erik; Heidrich, Mike (Fraunhofer Institute for Embeded Systems and Communication Technologies ESK, Hansastr. 32, Munich, 80686, Germany)

In industrial communications, especially in automation and control systems, data transmission shall be robust, of low-latency and energy-efficient. Adaptive modulation could be used to fulfill these requirements, where modulation schemes are adapted to current channel states. In this contribution, an orthogonal frequency division multiplexing (OFDM) based system with adaptive modulation is considered, where signalling is used to inform the receiver about the adapted modulation schemes. System performance in terms of frame error ratio (FER) is compared between fixed modulation and adaptive modulation with the proposed signalling schemes.