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Requirements of wireless systems in industrial areas

Requirements of wireless systems in industrial areas. Javier Ferrer-Coll , Per Ängskog , José Chilo , Peter Stenumgaard Center for RF Measurement Technology, University of Gävle, Sweden. Outline. Introduction Electromagnetic Interference Multipath Measurements

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Requirements of wireless systems in industrial areas

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  1. Requirements of wireless systems in industrial areas Javier Ferrer-Coll, Per Ängskog, José Chilo, Peter Stenumgaard Center for RF Measurement Technology, University of Gävle,Sweden

  2. Outline • Introduction • Electromagnetic Interference • Multipath Measurements • Propagation Loss • Overall • Conclusion

  3. Introduction • Commercial wireless applications face problems: • Electromagnetic Interference • ISI  Multipath Effects • Coverage  Propagation Loss • It is needed to characterize the environment before to deploy a wireless system  measurements, simulations. • Measurements campaign conducted at multiple industrial environments: • Steel Mill • Paper Warehouse • Rail Yard • Electromagnetic characterization from 20 MHz to 3 GHz.

  4. Electromagnetic Interference

  5. Electromagnetic Interference • Impulsive and Gaussian noise have different statistical properties. • Detect and calculate the impact of impulsive interference in communication systems.

  6. Electromagnetic Interference • Simulation of BPSK system with Gaussian and Impulsive noise.

  7. Electromagnetic Interference • Measurements of radio interference in railway transport. • Marshalling yard: Remote control locomotive technologies. Train with heavy load Reference measurement

  8. Electromagnetic Interference • Analysis of the interference • Broadband frequency scan • Time measurement at particular frequency • Statistical analysis

  9. Multipath Measurements

  10. Multipath Measurements • Time dispersion can produce ISI. • Where can we expect problems?  Quantify ISI (Inter-Symbol Interference) Ts Ts

  11. High-Reflective High-Absorbent

  12. MultipathHigh-Reflective to Absorbent 90% of the receivedenergyarrives at: • 10 ns for high-absorbent • 148ns for office • 664ns for high-reflective

  13. Propagation Loss

  14. Propagation Loss • LoS measurements in Reflective and Absorbent environment. • Stronger small scale fading for Reflective.

  15. Propagation Loss

  16. OverallInterference vsTime Dispersion • Low level of interference provides the best performance of wireless systems • High reflectivity can produce ISI but low reflectivity can insert coverage problems

  17. Conclusions • Impulsive noise are different than Gaussian. • Electrical motors, vehicles and repair work insert impulsive interference in wireless systems. • Different industrial environments have different propagation characteristics (Reflective, Absorbent). • There is not a single best solution for all industrial cases.

  18. Thank you!!!

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