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Statistical characteristics of the envelope in diversity combining of two correlated Rayleigh fading channels

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2 Author(s)
Tang, W. ; Dept. of Electr. & Syst. Eng., Pennsylvania Univ., Philadelphia, PA ; Kassam, S.A.

Performance of diversity systems is often evaluated under the assumption of perfect interleaving and characterised in terms of long-term parameters such as the average bit-error rate, which does not capture the dynamics of fading channels. Statistical characteristics (static and dynamic) of the envelope of two correlated Rayleigh fading channels are explored using a physical model. For two popular diversity-combining schemes, maximal ratio combining and selection combining, both static and dynamic (level-crossing rate) properties of correlated fading channels are derived. These results are very useful for performance evaluation of diversity systems without bit-level simulations. The results can also provide very useful characteristics such as average duration of fades, fading rate and outage probability for two-channel diversity systems and can be extended to multiple fading channels

Published in:

Communications, IET  (Volume:1 ,  Issue: 3 )

Date of Publication:

June 2007

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