Required carrier isolation—a reference parameter in a simplified coordination procedure for satellite communication systems
✍ Scribed by Manohar, R. ;Roy, M. N.
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 99 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0737-2884
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✦ Synopsis
Required carrier isolation (RCI) has been investigated in this paper and some values of RCI have been computed that can be used for comparing with the ALI values to conclude upon the burden sharing rather easily while discussing the frequency coordination of any two GSO satellite communication systems. It can be easily be seen that the most dissimilar carriers, i.e. the narrow SCPC carriers and wide band FDM/FM and FM/TV carriers, require the largest value of RCI of more than 50 dB for satisfactory operation on a common frequency band. This is because of the rather large number of narrow interfering carriers that can be accommodated in the desired broad band carrier. Most other carrier combinations can be accommodated within a 30 dB value of RCI. Satellite links over any two GSO systems where ALI of 30 dB or more is realizable will then be able to operate most such carrier combinations on a co-frequency basis.
The satisfactory operation of various carriers is obviously governed through recourse to the inter-system interference limits prescribed di!erently by di!erent ITU-R Recommendations. Translation of these varied criteria to a common parameter RCI that is inherently required in the alternative inter-system frequency coordination approach would simplify the application of the relevant radio regulatory provisions considerably.