Fundamentals of dynamic frequency hopping in cellular systems

We examine techniques for increasing spectral efficiency of cellular system s by using slow frequency hopping (FH) with dynamic frequency-hop (DFH) pat tern adaptation. We first present analytical results illustrating the impro vements in frequency outage probabilities obtained by DFH in comparison wit h random frequency hopping (RFH). Next, we show simulation results comparin g the performance of various DFH and RFH techniques. System performance is expressed by cumulative distribution functions of codeword error rates. Sys tems that we study incorporate channel coding, interleaving, antenna divers ity, and power control. Analysis and simulations consider the effects of pa th loss, shadowing, Rayleigh fading, cochannel interference, coherence band width, voice activity, and occupancy. The results indicate that systems usi ng DFH can support substantially more users than systems using RFH.