PROPAGATION ASPECTS OF FREQUENCY-HOPPING SPREAD SPECTRA

In the paper, the effect of frequency-hopping spread spectra (FH-SS) o n mobile channel characteristics is evaluated. Employing propagation s tudies, statistical analysis and simulation models, it is shown that t he frequency-hopped channel displays improved characteristics when com pared to the nonhopped case. Furthermore, the parameters specifically associated with the frequency-hopped channel are characterised, such a s hop rate and system bandwidth. It is shown that the long-term channe l statistics are unchanged by hopping. However, the short-term fading statistics are improved, and can be exploited to provide an overall in crease in the quality of service. The short-term statistics of the fre quency-hopped channel are derived, enabling prediction of the performa nce of FH-SS.