An Interfering Signal Detection Technique Using an Ultra Wideband Chirp Template Waveform

  • Authors:

  • Kohei Ohno;Makoto Itami;Tetsushi Ikegami

  • Affiliations:

  • Department of Applied Electronics, Faculty of Industrial Science and Technology, Tokyo University of Science, Chiba, Japan 278-8510;Department of Applied Electronics, Faculty of Industrial Science and Technology, Tokyo University of Science, Chiba, Japan 278-8510;Department of Electronics and Bioinformatics, School of Science and Technology, Meiji University, Kanagawa, Japan 214-8571

  • Venue:
  • Wireless Personal Communications: An International Journal
  • Year:
  • 2012

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Abstract

This paper discusses a coexisting signal detection technique for sharing the spectrum of an Ultra Wideband (UWB) radio with other radio systems. In some countries' regulations, the Detection and Avoidance technique is required to be implemented in UWB systems so they do not interfere with other radio systems. In most interference avoidance techniques it is necessary to detect emissions of the interfering system and the interfering bands. In this paper, correlation detection is applied for interfering signal detection without band pass filters. In the detector, a Chirp-UWB is prepared as a template waveform. The signal received before UWB communications is correlated with the Chirp-UWB template waveform, and is then integrated. The integral period is decided from the sweep function of the Chirp-UWB and the interfering bands. Therefore the detection technique can detect arbitrary frequency band signals by modifying the integral period. The sweep function of the Chirp-UWB also improves the detection performance. A sine function is adopted for the sweep function of the chirp. The miss Detection Error Rate and False Alarm Rate are evaluated to show the effectiveness of the proposed interference detection technique.