Second-order statistics of dual SC macrodiversity system over channels affected by Nakagami-m fading and correlated gamma shadowing

This paper considers second-order statistics of wireless communication system with microand macrodiversity reception in correlated gamma shadowed Nakagami-m fading channels. Macrolevel is of selection combining (SC) type and consists of two base stations (dual diversity) while N-branch receiver employing maximal ratio combining (MRC) is implemented on microlevel. Level crossing rate (LCR) and average fade duration (AFD) represent the system’s second-order statistics. They are important design criteria and performance measure for wireless communication systems. Rapidly converging infinite-series expressions for LCR and AFD are derived. Numerical results are presented graphically to illustrate the proposed mathematical analysis and to examine the effects of system’s parameters on the concerned quantities. Streszczenie. W artykule analizowano statystykę drugiego rzędu w systemach komunikacji bezprzewodowej ze zróżnicowanym odbiorem. Statystyka ta jest reprezentowana przez parametry LCR (level crossing ratio) i AFD (average fade duration). (Statystyka drugiego rzędu w systemie komunikacji bezprzewodowej zakłóconej przez tłumienia: Nakagami-m i skorelowane gamma)