|ITU-R Study Group: WP 4-9S||Document No: USWP-4-9S/18(Rev.5)|
WRC-97 Resolution 131
ITU-R Questions 60-1/4, 206-1/9 & 237-1/4
|Date: August 20, 1998|
Document Title: Possible Application of RecommendationITU-R S.1323 for Assessing Interference From FS Transmitters into NGSOFSS Earth Station Receivers
To consider the application of the criteria contained in RecommendationITU-R S.1323 to the analysis of interference from stations in the terrestrialfixed-service into NGSO FSS earth station receivers, in view of the factthat this interference is of a time-varying nature.
To contribute to the ITU-R work aimed at determining the feasibilityof co-frequency operation of NGSO FSS networks and FS stations.
To respond to the referenced resolution and questions in preparationfor WRC-2000.
To provide technical information for inclusion in a liaison statementfrom WP 4-9S to JTG 4-9-11 with the objective of contributing towards thedevelopment of CPM-99 Report text.
This paper explores the possibility of applying the interference criteriacontained in Recommendation ITU-R S.1323 to define the protection requiredby NGSO FSS earth stations with respect to the interference produced byFS stations.
This possibility should be explored in view of the time-varying natureof the interference.
An example procedure and some preliminary results are presented, whichcan serve as a guideline for developing the most appropriate interferencecriteria applicable in these interference situations.