Definition and drivation of level crossing rate and average fade duration in an interference-limited environment

Wireless signals are subject to multipath propagation, which results in Rayleigh fading characteristics and the fading signal fluctuates around its mean signal level. The level crossing rate (LCR) and average fade duration (AFD) are often used to characterize the signal-fading statistics. This paper explores the LCR and AFD issue in an interference environment. New definitions of LCR and AFD are introduced and the corresponding expressions are derived for an interference-limited environment.