Modulation Classification for Adaptive Mobile OFDM Systems
Conference: OFDM 2014 - 18th International OFDM Workshop 2014 (InOWo'14)
08/27/0000 - 08/28/2014 at Essen, Deutschland
Proceedings: OFDM 2014
Pages: 8Language: englishTyp: PDF
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Authors:
Husmann, Christopher; Chen, Yun (Fraunhofer Institute for Embeded Systems and Communication Technologies ESK, Hansastr. 32, 80686 Munich, Germany)
Abstract:
Adaptive modulation is an efficient approach to combat the effect of deep fades in orthogonal frequency division multiplexing (OFDM) systems with time-varying multipath channels. However, the receiver has to know the applied modulation scheme to perform the demodulation. Blind detection of the modulation scheme eliminates the need of a signaling overhead. In this contribution, a simplified maximum a priori based automatic modulation classification algorithm is analyzed. Simulations indicate that via efficient utilizations of boundary conditions and channel properties a good classification performance can already be achieved for a small number of observed symbols.