Capture probability and throughput analysis of slotted ALOHA and unslotted np-ISMA in a Rician/Rayleigh environment

The performance of mobile radio communication systems is analyzed, in terms of the capture probability and throughput, for the slotted ALOHA and the unslotted np-ISMA (nonpersistent inhibit sense multiple access) protocol with receiver capture. The influence of Rayleigh faded interference and additive white Gaussian noise (AWGN) is studied on the performance of the two protocols considering BPSK (binary phase shift keying) modulated desired test signal, which suffers from Rician fading and the near-far effect. BCH (Bose Chaudhuri Hocquenghem) error correction codes consisting of packets with equal numbers of bits are introduced to improve the performance of the system, considering both fast and slow multipath fading.<
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