On the influence of correlated Rayleigh-fading channel with capture over IEEE 802.11 WLANs

Considering the flat Rayleigh-faded channel, we derived an analytical expression for the frame capture probability P/sub capture/ assuming two discrete mean power levels (occurring with predefined probability) of frames at the receiver. The simulations prove the validity of such a capture model assuming 24 dB difference of the two power levels. The expected through improvement under capture is observed only given the RTS/CTS "handshake" transmission scheme is not used. The impact of different lengths of frame-error bursts due to correlated channel fading over performance can be neglected.