①Department of Electronic Engineering, Naval Aeronautical Engineering Institute, Yantai 264001, China; ②Shanghai Research Center for Wireless Communications, Shanghai 200050, China; ③The 36th Research Institute of China Electronic Technology Group Corporation, Jiaxing 314001, China
Abstract：The Joint Probability Density Function (JPDF) of signal envelope and its derivative, which is subjected to composite fading, is analyzed by means of conditional probability density. New uniform expressions for the average Level Crossing Rate (LCR) and Average Fade Duration (AFD) of signal envelope are derived using the above obtained JPDF, then some results of the PDF, Cumulative Distribution Function (CDF), average LCR and AFD of signal envelopes, characterized by Rayleigh-Lognormal, Ricean-Lognormal, Nakagami-Lognormal fading models, are derived via Gauss-Hermite quadrature. Simulation results validate the correctness of these expressions.
2008, Vol. 30 
