ERROR FLOOR OF GAUSSIAN MINIMUM SHIFT KEYING IN MOBILE RADIO CHANNELSWITH LARGE-SCALE AND SMALL-SCALE FADING

We analyze the error floor due to channel-induced intersymbol interfer ence for TDMA mobile radio systems that use the Gaussian minimum shift keying (GMSK) modulation format; both fixed and adaptive sampling is considered. The channel is assumed to have a two-spike impulse respons e, where the spikes suffer from both small-scale (Rayleigh or Rice) an d large-scale (lognormal) fading. We compute the average bit error pro bability and the probability density function of the numbers of bit er rors in one data burst when we have interleaving. The probability dens ity function allows the prediction of transmission quality with channe l coding.