6th International ICST Symposium on Modeling and Optimization

Research Article

Characterization of Multi-Channel Interference

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  • @INPROCEEDINGS{10.4108/ICST.WIOPT2008.3181,
        author={Ozlem Durmaz Incel and Pierre Jansen},
        title={Characterization of Multi-Channel Interference},
        proceedings={6th International ICST Symposium on Modeling and Optimization},
        keywords={Analytical models Bit error rate Channel spacing Computer science Error analysis Frequency Interchannel interference Transceivers Wireless application protocol Wireless networks},
  • Ozlem Durmaz Incel
    Pierre Jansen
    Year: 2008
    Characterization of Multi-Channel Interference
    DOI: 10.4108/ICST.WIOPT2008.3181
Ozlem Durmaz Incel1,*, Pierre Jansen1,*
  • 1: Department of Computer Science, University of Twente, The Netherlands.
*Contact email: o.durmaz@cs.utwente.nl, jansen@cs.utwente.nl


Multi-channel communication protocols in wireless networks usually assume perfect orthogonality between wireless channels or consider only the use of interference-free channels. The first approach may overestimate the performance whereas the second approach may fail to utilize the spectrum efficiently. Therefore, a more realistic approach would be the careful use of interfering channels by controlling the interference at an acceptable level. We present a methodology to estimate the packet error rate (PER) due to inter-channel interference in a wireless network. The methodology experimentally characterizes the multi-channel interference and analytically estimates it based on the observations from the experiments. Furthermore, the analytical estimation is used in simulations to derive estimates of the capacity in larger networks. Simulation results show that the achievable network capacity, which is defined as the number of simultaneous transmissions, significantly increases with realistic interfering channels compared with the use of only orthogonal channels. When we consider the same number of channels, the achievable capacity with realistic interfering channels can be close to the capacity of idealistic orthogonal channels. This shows that overlapping channels which constitute a much smaller band, provides more efficient use of the spectrum. Finally, we explore the correctness of channel orthogonality and show why this assumption may fail in a practical setting.