Capture effect with diversity in IEEE 802.11b DCF

In this paper, we examined the influence of capture effect with L-fold antenna diversity at the access point over IEEE 802.11b DCF at 11 Mbit/s. We are able to obtain an exact closed-form solution for the conditional capture probability in case of L-fold ideal selection diversity, and an approximate closed-form solution for the conditional capture probability in case of L-fold maximum selection diversity in Rayleigh-faded channel. By using numerical integration, we calculated the total frame capture probability vs. the number of contending stations and capture ratio, and then we analytically evaluated the network saturation throughput of a single IEEE 802.11 BSS operating in Basic or RTS/CTS access methods.