Progress in and Prospects of On-Board Communication Equipment Technologies for Communications Satellites in Japan

Ueba, Masazumi; Miyasaka, Akihiro; Suzuki, Yôiti; Yamashita, Fumiyoshi

doi:10.1587/transcom.2016pfi0002

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…Satellite mobile communication refers to the use of communication satellites as a relay to provide a transfer or exchange between the signals sent and received by each device in the ground segment. As one of the main means of modern communication, satellite communication has the advantages of wide coverage, large communication capacity, less restriction by geographical location, wide communication band and flexibility (Ueba et al , 2017). Satellite as an essential component of a communications satellite constellation, the evaluation of its effectiveness is an important part of the constellation’s feasibility studies, providing an important basis for the design, maintenance and application of the constellation.…”

Section: Introductionmentioning

confidence: 99%

A comprehensive G-Lz-ADC effectiveness evaluation model for the single communication satellite system in the context of poor information

Shao

Fang

Tao

et al. 2021

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PurposeDuring the service period of communication satellite systems, their performance is often degraded due to the depletion mechanism. In this paper, the grey system theory is applied to the multi-state system effectiveness evaluation and the grey Lz-transformation ADC (availability, dependability and capability) effectiveness evaluation model is constructed to address the characteristics of the communication satellite system such as different constituent subsystems, numerous states and the inaccuracy and insufficiency of data.Design/methodology/approachThe model is based on the ADC effectiveness evaluation method, combined with the Lz transformation and uses the definite weighted function of the three-parameter interval grey number as a bridge to incorporate the possibility of system performance being greater than the task demand into the effectiveness solution algorithm. At the same time, using MATLAB (Matrix laboratory) to solve each state probability, the same performance level in the Lz transform is combined. Then, the system effectiveness is obtained by Python.FindingsThe results show that the G-Lz-ADC model constructed in this paper can accurately evaluate the effectiveness of static/dynamic systems and certain/uncertain system and also has better applicability in evaluating the effectiveness of the multi-state complex system.Practical implicationsThe G-Lz-ADC effectiveness evaluation model constructed in this paper can effectively reduce the complexity of traditional effectiveness evaluation models by combining the same performance levels in the Lz-transform and solving the effectiveness of the system with the help of computer programming, providing a new method for the effectiveness evaluation of the complex MSS. At the same time, the weaknesses of the system can be identified, providing a theoretical basis for improving the system’s effectiveness.Originality/valueThe possibility solution method based on the definite weighted function comparing the two three-parameter interval grey numbers is constructed, which compensates for the traditional calculation of the probability based on numerical values and subjective preferences of decision-makers. Meanwhile, the effectiveness evaluation model integrates the basic theories of three-parameter interval grey number and its definite weighted function, Grey−Markov, grey universal generating function (GUGF), grey multi-state system (GMSS), etc., which is an innovative method to solve the effectiveness of a multi-state instantaneous communication satellite system.

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Section: Introductionmentioning

confidence: 99%