XIONG Ju, SU Yong-tao, JI Kai. Research on modeling and simulation of downlink interference in satellite communication system based on OPNET[J]. 2019, 36(11): 49-54.
XIONG Ju, SU Yong-tao, JI Kai. Research on modeling and simulation of downlink interference in satellite communication system based on OPNET[J]. 2019, 36(11): 49-54.DOI:
Research on modeling and simulation of downlink interference in satellite communication system based on OPNET
Inter-cell co-interference caused by side lobes of satellite multi-beam antenna is an important basis for network planning and engineering design of satellite communicate system. Aiming at the interference problem caused by the side lobes of multi-beam antennas
firstly
based on the analysis of system frequency planning and downlink co-channel interference generation mechanism
the downlink co-channel interference model of multi-beam satellite communication system is obtained. Secondly
the satellite single beam antenna model is designed according to the antenna radiation characteristics given in Recommendation ITU-R S.672-4. Then
according signal beam antenna model and the requirements of the multi-beam antenna covering the ground
the coverage parameters of multi-beam antenna are obtained through geometric analysis. Finally
using the OPNET network simulation software
the satellite single beam antenna is modeled by the ema programming mechanism
and in a rectangular area of 80° east and west longitude and 64.8°north and south latitude
radiation characteristics of multi-beam antennas and downlink co-channel interference characteristics of 7-cell co-frequency and 3-color multiplexing are obtained through the mobile statistic of 109 mobile data receivers located at 1.2° apart on the same meridian. The simulation results show that the proposed model can accurately calculate the carrier interference ratio of any latitude and longitude under satellite multi-beam antenna coverage and carrier interference noise ratio intensity map of the whole network.
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