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Joint Detection of Primary Systems Using UWB Impulse Radios

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Joint Detection of Primary Systems Using UWB Impulse Radios.pdf (795.1Kb)
Date
2011
Author
Erküçük, Serhat
Lampe, Lutz
Schober, Robert
Abstract
Regulation in Europe and Japan requires the implementation of detect-and-avoid (DAA) techniques in some bands for the coexistence of licensed primary systems and secondary ultra wideband (UWB) systems. In a typical coexistence scenario a primary system may have potentially interdependent uplink-downlink communication channels (e. g. simultaneous uplink-downlink communications in a frequency division duplex system) overlapping with the frequency band of a UWB system. If such interdependencies of primary systems' activities are known the UWB system's ability to detect primary systems can be improved. In this study we are interested in determining the possible gains in the detection performance when taking interdependencies into account for practically implementable detection methods. Contrary to selecting the detection thresholds individually for each band as in a conventional detection approach the bands are jointly processed. To this end maximum a posteriori (MAP) decision variables are generated at the receiver and bias terms are introduced to achieve a desired trade-off between the probabilities of detection and false alarm. In addition to finding the optimal detection results based on the Neyman-Pearson (NP) test a suboptimal but practically implementable approach is also considered and the gain compared to conventional independent detection is quantified for various practical scenarios. The results obtained from this study can be used for improving the primary system detection performance of UWB systems as well as for cognitive radios that perform spectrum sensing in multiple bands.

Source

Transactions on Wireless Communications

Issue

2

Volume

10

Pages

419-424

URI

https://hdl.handle.net/20.500.12469/998
https://doi.org/10.1109/TWC.2011.122010.100990

Collections

  • Araştırma Çıktıları / Scopus [1565]
  • Araştırma Çıktıları / WOS [1518]
  • Elektrik-Elektronik Mühendisliği / Electrical - Electronics Engineering [320]

Keywords

Ultra wideband (UWB) systems
Detect-and-avoid (DAA)
Coexistence
Spectrum sensing
Joint detection
Cognitive radios

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DSpace software copyright © 2002-2015  DuraSpace
Contact Us | Send Feedback
Theme by 
@mire NV