Joint modeling of fade and interfade duration on radio connections applying Markov chain

Fade and interfade duration are important dynamic aspects of path attenuation corresponding to the time length during which a fixed threshold is exceeded by path attenuation or it is below the level. Precise estimation these dynamic parameters is essential to be taken into account in wireless communication system design for several reasons like calculating the system outage or unavailability period, sharing the system resource during the fading events, apply fade mitigation techniques, select the right coding scheme etc. In this paper we are presenting a digital model with N-state partitioned Markov chain for the joined statistical prediction of the fade and interfade duration. A new method introduced to derive the parameter set from the separate digital model of fade and interfade duration Markov models. The joint model applies the steady state probabilities to derive the joint state transition probabilities. The parameterization is based on a measurement of a high frequency terrestrial radio link. To achieve this goal, in the fading model parameterization process beside the fade events we take into account also the interfade periods, likewise in the interfade modelling. This allows a more precise description of the fading and non-fading process and leads to the possibility of the joint fade-interfade duration modelling.