cogcom 16(7): e3

Research Article

Receiving more than data - a signal model, theory and implementation of a cognitive IEEE 802.15.4 receiver

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  • @ARTICLE{10.4108/eai.5-9-2016.151646,
        author={Tim Esemann and Horst Hellbr\'{y}ck},
        title={Receiving more than data - a signal model, theory and implementation of a cognitive IEEE 802.15.4 receiver},
        journal={EAI Endorsed Transactions on Cognitive Communications},
        volume={2},
        number={7},
        publisher={EAI},
        journal_a={COGCOM},
        year={2016},
        month={9},
        keywords={cognitive communication system, cognitive radio, spectrum sensing},
        doi={10.4108/eai.5-9-2016.151646}
    }
    
  • Tim Esemann
    Horst Hellbrück
    Year: 2016
    Receiving more than data - a signal model, theory and implementation of a cognitive IEEE 802.15.4 receiver
    COGCOM
    EAI
    DOI: 10.4108/eai.5-9-2016.151646
Tim Esemann1,*, Horst Hellbrück1
  • 1: Lübeck University of Applied Sciences, Germany Department of Electrical Engineering and Computer Science CoSA Center of Excellence
*Contact email: tim.esemann@h-luebeck.de

Abstract

Standard medium access schemes sense the channel immediately prior transmission, but are blind during the transmission. Therefore, standard transceivers have limited cognitive capabilities which are important for operation in heterogeneous radio environments. Specifically, mobile interferers move gradually into the reception range before actually causing collisions. These gradual interferences cannot yet be detected, and upcoming collisions cannot be predicted. We present a theoretical analysis of the received and demodulated signal. This analysis and the derived signal model verifies that the received signal contains more than transmitted data exclusively. Enhanced signal processing extracts signal components of an interference at the receiver and enables advanced interference detection to provide information about approaching mobile interferers. Our theoretical analysis is evaluated by simulations and experiments with an IEEE 802.15.4 transmitter and an extended cognitive receiver.