# Jamming Analysis between Non-Cooperative Mega-Constellations Based on Satellite Network Capacity
###### Abstract  
Due to the openness of inter-satellite links (ISLs) in mega-constellations, the threat posed by jamming from non-cooperative constellations is becoming increasingly significant. Most of the existing approaches focus on the up/down link capacity between satellites and ground stations, which differs greatly from the situation whereby SLS are subjected to non-cooperative jamming. Therefore, this work investigates the transmission rates of SLS under jamming from non-cooperative mega-constellations. Based on this, a novel satellite network capacity calculation method is proposed to evaluate the mega-constellation network capacity when the transmission rates change dynamically. The simulation results show that the satellite number, jamming power and inclination of non-cooperative constellations have a significant influence on the network capacity. The optimal jamming efficiency occurs when the constellation inclinations are close.  
jamming analysis; mega-constellation; satellite network capacity; inter-satellite link; satellite communication +
Footnote †: journal: Electronics  
0000-0002-2300-3300][PERSON]  
0000-0002-3300-3300][PERSON]  
0000-0002-3300-3300-3300-3300-3300-3300-3300-3300-3300-3300-3300-33000-To address these issues, we define a typical non-cooperative jamming scenario [13; 14] with two mega-constellations to analyze the impact of potential non-cooperative jamming on the satellite network capacity. Against this background, two questions remain to be answered: (1) How can we determine the impact of the jamming parameters on a single ISL's capacity? (2) How can we accurately measure the overall communication capacity of a mega-constellation network when the transmission rates of the ISLs are dynamically changing? To address the aforementioned challenges, we propose a calculation method for the satellite network capacity under non-cooperative jamming. We propose the main jamming region and propagation model to investigate the transmission rate under non-cooperative jamming. Based on this, a novel satellite network capacity calculation method is proposed to evaluate the network capacity of mega-constellations when the transmission rates change dynamically. The main determinants of the jamming effects are investigated to guide the anti-jamming design of mega-constellations. The main contributions of this paper are as follows:  
* The concept of the main jamming region is defined in order to describe the jamming scene between mega-constellations;
* The transmission rates of ISLs in mega-constellations under jamming from non-cooperative constellations are calculated, and a novel satellite network capacity calculation method is propose to evaluate the network capacity of mega-constellations when the transmission rates change dynamically;
* The simulation results show that the jamming power, constellation scale and inclination of non-cooperative jamming constellations have a significant influence on mega-constellations' network capacities.  
The rest of the paper is organized as follows. In Section 2, we define the main jamming region and system model. In Section 3, we propose the satellite network capacity calculation method. In Section 4, the simulation results verify the effectiveness of our method. Section 5 concludes the paper.