APPLICATION OF FREQUENCY DIVERSITY FOR DIMENSIONING AKa-BAND SATELLITE SYSTEM

✍ Scribed by LUGLIO, MICHELE

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 741 KB
• Volume: 14
• Category: Article
• ISSN: 0737-2884
• DOI: 10.1002/(sici)1099-1247(199601)14:1<53::aid-sat529>3.0.co;2-e

✦ Synopsis

The growth of the demand for telecommunication services is going to saturate the frequency bands usually used (C or KJ. For this reason the Ka-band is much considered and is going to be highly used.

To meet the requirements of a more developed market a satellite system in KO-band with European coverage and better performance than those of common VSATs, especially in terms of capacity and of link availability, is proposed and characterized.

The negative effect due to the high rain attenuation, that represents the main impairment using K,-band, can be mitigated using one or more fade countermeasures.

Frequency diversity, which well suites the characteristics of the proposed systems, has been analysed and characterized in detail using a model developed at Politecnico di Milano. Its performances are shown as a function of different system parameters such as total number of stations, number of assisted stations, link availability and statistical dependence among stations.

The aim of the paper is to introduce a design methodology and to show the advantages obtainable using frequency diversity for a Ka-band system with higher performances than common VSATs.

The advantages achieved for rain margins are shown and system design parameters are then compared with those of an uncompensated system.

Using this type of countermeasure, the dimensioning of the whole system (both payload and earthstation) is proved to be much less severe.