Computationally tractable model of energy detection performance over slow fading channels

Hongjian Sun, David I. Laurenson, Cheng Xiang Wang

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Energy detection (ED) has been widely used for detecting unknown deterministic signals in many wireless communication applications, e.g., cognitive radio, and ultra-wideband (UWB). However, the performance analysis of ED over slow fading channels is cumbersome, because it is difficult to derive closed-form expressions for the average probability of detection involving the generalised Marcum Q-function and the log-normal distribution. In this letter, we derive an approximation of the average probability of detection over a slow fading channel by replacing the log-normal distribution with a Wald distribution. In addition, we analyze the detection performance of the ED using a square-law combining scheme over multiple independent and identically distributed slow fading channels. © 2006 IEEE.

Original languageEnglish
Article number5581186
Pages (from-to)924-926
Number of pages3
JournalIEEE Communications Letters
Volume14
Issue number10
DOIs
Publication statusPublished - Oct 2010

Keywords

  • cognitive radio
  • Energy detection
  • slow fading
  • UWB
  • Wald distribution

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