Characterization and modelling of time diversity statistics for satellite communications from 12 to 50 GHz

Abstract

SUMMARYTo compensate propagation impairments on Earth-space communication links, a specific fade mitigation technique to make up for rain propagation impairments is studied in this paper: the time diversity. This process consists in sending the information when the propagation channel allows to get it through. Here the time diversity technique is applied to different experimental attenuation time series collected in Europe: Spino d'Adda (Italy), Louvain-la-Neuve and Lessive (Belgium). These propagation measurements have been collected from 12 to 50 GHz and the performance of time diversity technique is assessed from the generation of time diversity statistics conditioned to the time delay. A prediction method of these statistics is also described. The proposed model relies on the time correlation of the attenuation time series. The model is validated and its accuracy analysed in terms of prediction error calculated using the different databases.

On the Outage Probability Prediction of Time Diversity Scheme in Broadband Satellite Communication Systems

“…In Figures 4 and 5, for data derived from measurements at Spino d'Adda at frequencies 19 GHz and 40 GHz, respectively. The experimental curves were derived from [13]. In [13], as this is mentioned in the paper, the statistics presented refer to in-excess attenuation.…”

“…The experimental curves were derived from [13]. In [13], as this is mentioned in the paper, the statistics presented refer to in-excess attenuation. However, in this paper due to the lack of measurements for time diversity systems, we compare the proposed model with these data.…”

“…The latter is based on the knowledge and modelling of joint exceedance probability of rain attenuation. In [12,13], two models are proposed for the computation of joint exceedance probability of rain attenuation based on the assumption that rain attenuation follows the lognormal distribution. Following this assumption and adopting a temporal correlation coefficient the joint Complementary Cumulative Distribution Function (CCDF) of rain attenuation is calculated.…”

Time diversity prediction modeling using Copula functions for satellite communication systems operating above 10GHz

“…In particular, in the latter three references, i.e. [11][12][13], the joint statistics of rain attenuation for different time lags (waiting period) are modeled in order to be able to derive the outage probability of a system. In these three references, it is assumed that rain attenuation statistical behavior is approximated with lognormal distribution.…”

“…In [6][7][8][9][10][11][12][13], time diversity technique for satellite systems operating under rain is investigated and modeled. In particular, in the latter three references, i.e.…”