Performance Analysis of Diversity Combining Algorithms in Shadowed Fading Channels

  • Authors:
  • P. M. Shankar

  • Affiliations:
  • Department of Electrical and Computer Engineering, Drexel University, Philadelphia, USA 19104

  • Venue:
  • Wireless Personal Communications: An International Journal
  • Year:
  • 2006

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Abstract

A compound fading model incorporating short term fading and shadowing proposed recently is used to analyze the performance of wireless systems employing microscopic diversity to mitigate the effects of flat fading. This model can account for the presence of different levels of fading and shadowing and provide an analytical solution for the probability density function of the signal-to-noise ratio. Using that model, the performances of MRC and SC diversity combining algorithms were studied. The amount fading (AF) following diversity implementation was calculated and it is seen that the decline in the amount of fading is bound by the level of shadowing present, with the MRC providing a larger decrease in the amount of fading than the SC algorithm. The effect on the error rates was studied using the example of the coherent BPSK modem. Results show that the performances of wireless systems can be analyzed using the compound model for the shadowed fading channels.