EXIT chart optimization of Turbo-FSK: Application to Low Power Wide Area networks

Yoann Roth (1) , Jean-Baptiste Doré (1) , Laurent Ros (2) , Vincent Berg (1)

1 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information
2 GIPSA-CICS - GIPSA - Communication Information and Complex Systems

Low Power Wide Area (LPWA) networks aim at connecting low cost devices with high constraints on the link budget. Focusing on the physical layer, the combination of Frequency Shift Keying (FSK) modulation and coding in the same process has been shown efficient when associated to a turbo receiver. This paper considers the optimization of Turbo-FSK parameters for the LPWA context using the EXtrinsic Information Transfer (EXIT) Chart analysis. After adapting the metric to the FSK waveforms, EXIT chart performance results are extended and compared to short packet lengths using extensive Bit Error Rate (BER) computations.

Mots clés: Low Power Wide Area; LPWA; Internet of Things; PHY-layer; FSK; Turbo Code; Low Rate; Low SNR; Machine-to-; Machine; EXIT Chart

Domaines: Traitement du signal et de l'image [eess.SP]

Yoann Roth, Jean-Baptiste Doré, Laurent Ros, Vincent Berg. EXIT chart optimization of Turbo-FSK: Application to Low Power Wide Area networks. 9th International Symposium on Turbo Codes & Iterative Information Processing, Sep 2016, Brest, France. pp.46-50, ⟨10.1109/ISTC.2016.7593074⟩. ⟨hal-01418421⟩