Level Crossing Rate of Macrodiversity System in the Presence of Multipath Fading and Shadowing

Abstract

Macrodiversity system including macrodiversity SC receiver and two microdiversity SC receivers is considered in this paper. Received signal experiences, simultaneously, both, long term fading and short term fading. Microdiversity SC receivers reduces Rayleigh fading effects on system performance and macrodiversity SC receiver mitigate Gamma shadowing effects on system performance. Closed form expressions for level crossing rate of microdiversity SC receivers output signals envelopes are calculated. This expression is used for evaluation of level crossing rate of macrodiversity SC receiver output signal envelope. Numerical expressions are illustrated to show the influence of Gamma shadowing severity on level crossing rate.

Keywords

• Macrodiversity selection combining (SC) receiver
• Rayleigh multipath fading
• Gamma shadowing
• level crossing rate
• correlation