TR2006-081

On the Optimality of Equal Gain Combining for Energy Detection of Unknown Signals

    •  Gezici, S., Sahinoglu, Z., Poor, H.V., "On the Optimality of Equal Gain Combining for Energy Detection of Unknown Signals", IEEE Communications Letters, Vol. 10, No. 11, pp. 772-774, November 2006.
      BibTeX TR2006-081 PDF
      • @article{Gezici2006nov,
      • author = {Gezici, S. and Sahinoglu, Z. and Poor, H.V.},
      • title = {On the Optimality of Equal Gain Combining for Energy Detection of Unknown Signals},
      • journal = {IEEE Communications Letters},
      • year = 2006,
      • volume = 10,
      • number = 11,
      • pages = {772--774},
      • month = nov,
      • issn = {1089-7798},
      • url = {https://www.merl.com/publications/TR2006-081}
      • }
  • Research Areas:

    Signal Processing, Communications

Abstract:

In this letter, the optimality of equal gain combining (EGC) for energy detection of unknown signals in a system with receive-diversity is studied. It is shown that EGC results in an optimal test statistic for infinitesimally small signal-to-noise ratios (SNRs); however, it does not yield the optimal test for all SNR values according to the Neyman-Pearson criterion. In other words, EGC does not induce a uniformly most powerful (UMP) test for unknown signal detection.

 

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