Impact of Interference on Broadcasting Satellite Services in Terms of Increase Rate of Outage Time Caused by Rain Attenuation

摘要

The indexes of the degradation of C/N, ΔT/T and I/N, which can be converted from one to another, are used to evaluate the impact of interference on the satellite link. These indexes are based on the increase of the noise temperature. On the other hand pfd (power flux density) and C/I values are used as a threshold for triggering coordination or sharing criteria. However, it is not suitable to intuitively understand how these parameters degrade the quality of services. In this paper, we propose to evaluate the impact of interference on the performance of BSS (Broadcasting Satellite Services) in terms of the increase rate of the outage time caused by the rain attenuation. Some calculation results are given for the 12GHz band BSS in Japan.