Adaptive filtering for selective subband transmission based on interference detection

  • Authors:
  • Pingzhou Tu;Xiaojing Huang;Eryk Dutkiewicz

  • Affiliations:
  • University of Wollongong, Wollongong, Australia;Univeisity of Wollongong, Wollongong, Australia;Univeisity of Wollongong, Wollongong, Australia

  • Venue:
  • Proceedings of the 1st ACM international workshop on Heterogeneous sensor and actor networks
  • Year:
  • 2008

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Abstract

In a shared radio spectrum environment, multiple systems may interfere with each other. In this paper we propose an adaptive filtering method to suppress interference and select the most suitable subbands according to predetermined interference thresholds. Two methods to determine these interference thresholds in Gaussian and multipath fading channels are introduced. The adaptive filtering method enables a system to dynamically use frequency subbands without employing frequency hopping techniques. The flexible received signal bandwidth with different number of subbands provides great potential for systems to coexist with each other, resulting in higher spectrum utilization efficiency. To verify the ectiveness of the proposed adaptive filtering method, the system bit error rates (BERs) under different interference conditions are simulated and compared.