Energy change detection of appearance of the primary signal with unknown power

  • Authors:
  • Weixia Zou;Mingjie Liu;Wei Liu;Kyung Sup Kwak;Chengshi Zhao

  • Affiliations:
  • Key Lab of Universal Wireless Communications, MOE, Wireless Network Lab, Beijing University of Posts and Telecommunications, Beijing, China;Key Lab of Universal Wireless Communications, MOE, Wireless Network Lab, Beijing University of Posts and Telecommunications, Beijing, China;Department of Service Technology, China Mobile Research Institue, Xuanwu District, Beijing, China;UWB, ITRC, Inha University, Inchen, Korea;Key Lab of Universal Wireless Communications, MOE, Wireless Network Lab, Beijing University of Posts and Telecommunications, Beijing, China and UWB, ITRC, Inha University, Inchen, Korea

  • Venue:
  • ISCIT'09 Proceedings of the 9th international conference on Communications and information technologies
  • Year:
  • 2009

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Abstract

In this paper, a sequential change detection scheme is proposed to detect the emergence of a primary signal with unknown power. It can be shown that the proposed test can do better than the generalized likelihood ratio (GLR) test, under the same worst case average run length (ARL) of detection delay constraint. And performance of our test is evaluated using theoretical analysis and numerical simulations.