Analysis of the rain outage performance of route diversity systems

Int. J. Satell. Commun. Network.

2004

SUMMARYIn modern satellite communications, matters such as frequency congestion, transmission of dual polarized carriers and increase of the number of geostationary satellites in use, necessitate the implementation of interference analysis in neighbouring networks so as to ensure satisfactory quality of service. In this paper, a recently proposed model for the prediction of the degradation of the carrier-to-interference ratio due to differential rain attenuation and cross-polarization, which is applicable only for the noise-dominant case, has been properly modified to include the general case. The proposed model is based on the lognormal assumption for the point rainfall rate statistics and the convective raincell model. Due to complexity of the proposed analysis, some simple regression-derived formulas have been generated forming a very useful tool for the system engineer. The elaborations of numerical results examine the influence of various parameters upon the total availability performance and the optimum utilization of the geostationary orbit.

“…Analytical formulas expressing the above parameters in terms of the lognormal statistical parameters of the point rainfall distribution can be found in Reference [17]. Figure B1.…”

Section: Appendix B: Derivation Of Expression (2)mentioning

confidence: 99%

“…The parameters encountered in this formula are defined as in terms of the known parameters of the problem is presented in Reference [17].…”

Section: Appendix B: Derivation Of Expression (2)mentioning

confidence: 99%

A model for the estimation of the carrier-to-noise plus total interference ratio between two adjacent dual polarized satellite links sharing the same frequency band

Katsambas

Int. J. Satell. Commun. Network.

2004

“…[12] In the above expressions A m 1 ; S a 1 are the lognormal statistical parameters of the attenuation A [Kanellopoulos and Koukoulas, 1987] …”

Section: Discussionmentioning

confidence: 99%

Prediction of the degradation of the carrier‐to‐noise plus interference ratio concerning a site diversity system suffering from differential rain attenuation

Livieratos

2002

Radio Science

Self Cite

[1] Rain-induced attenuation is a factor of utmost importance in designing a satellite link since it can strongly deteriorate the availability and performance of an Earth-space path. Availability and performance are key criteria for the reliable design process. In the present paper the statistics of carrier-to-noise plus interference ratio under rain fade conditions are examined, given that the interference is caused by an adjacent satellite operating at the same frequency, and taking also under consideration double site diversity protection as a countermeasure technique. The method presented herein is based on a model of convective rain cells and the lognormal assumption for the point rainfall statistics. Numerical results have been obtained for heavy rain climatic regions and very large availability times, to examine how effective site diversity can be, not only for lowering fade margins but for compensating severe interference effects. Moreover, the elaboration of the numerical results has revealed how the optimum design of the satellite link can be achieved by selecting proper values for some critical parameters of the system.INDEX TERMS: 6979 Radio Science: Space and satellite communication; 6964 Radio Science: Radio wave propagation; 6914 Radio Science: Electromagnetic noise and interference; 6904 Radio Science: Atmospheric propagation; KEYWORDS: rain attenuation, interference, site diversity Citation: Livieratos, S. N., and J. D. Kanellopoulos, Prediction of the degradation of the carrier-to-noise plus interference ratio concerning a site diversity system suffering from differential rain attenuation,

“…A methodology to evaluate the latter parameter is also shown where rain rate duration statistics are available. For the static properties of rain attenuation the Kanellopoulos-Koukoulas model [8] is adopted, which assumes the unconditional log-normal form for the statistical representation of the long-term point rainfall rate and rain attenuation on a microwave path as well the spatial correlation coefficient between two points as suggested by Lin [9]. The proposed methodology is compared with appropriate experimental results taken from Barcelona, Italy and England, extracted from the open literature.…”

Section: Introductionmentioning

confidence: 99%

On the rain attenuation dynamics: spatial‐temporal analysis of rainfall rate and fade duration statistics

Panagopoulos

2003

Satell Commun Network

SUMMARYKnowledge about the dynamic characteristics of rain attenuation is of utmost importance for many applications in terrestrial and satellite communication systems operating at frequencies above 10 GHz: Long-term rain rate statistics and rain rate duration statistics are usually available from meteorological data. In this paper, a spatial-temporal analysis is employed in order to evaluate the rain attenuation power spectrum of a terrestrial/satellite path. The predicted power spectrum is compared with experimental data. Based on the spectral analysis of rainfall rate a method for converting rain rate duration statistics to link fade duration statistics is also proposed. Fade duration statistics are presented for terrestrial and satellite links and compared with available experimental data. The agreement between the predicted results and the experimental data has been found to be quite encouraging. Finally, numerical results are presented for various climatic zones, elevation angles and frequencies. Some very useful conclusions concerning the dynamic properties of rain attenuation for a microwave path are deduced.