Communications have become the invisible thread that sustains any modern military operation. Troops, vehicles or missiles are no longer enough: without a stable and resilient network, the situation can become complicated. During the Ukrainian war, Starlink demonstrated be able to keep Ukrainian forces connected even under pressure, and has since been placed at the center of the debate over its role in military scenarios. According to South China Morning Posta group of Chinese researchers linked to defense institutions has examined to what extent that network could resist a large-scale interference attempt on a territory like Taiwan.
Starlink is not a typical satellite network. Instead of relying on a few high-altitude satellites in fixed positions above the equator, it is made up of thousands of small satellites that orbit the Earth at low altitudes and on changing routes. This architecture allows a terminal on the ground to not always connect to the same satellite, but to jump between several in a matter of seconds, forming a flexible mesh that is difficult to interrupt. That dynamic behavior largely explains why it has become a key element in debates about electronic warfare.
A laboratory experiment. The study that has put numbers to this scenario is titled “Simulation research of distributed jammers against mega-constellation downlink communication transmissions” and appeared on November 5 in the Chinese magazine Systems Engineering and Electronics. It is signed by a team from Zhejiang University and the Beijing Institute of Technology, an institution with a prominent presence in the country’s military research. It should be noted that it is not an operational document or an official proposal from the Chinese Army, but rather an academic simulation that explores, from a technical point of view, what it would take to interfere with a network like Starlink on a regional scale.
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A constellation designed to avoid interference. The study does not limit itself to describing that the terminals change satellites, but analyzes how this change thwarts any attempt at sustained interference. When a hostile signal affects a link, the terminal automatically redirects traffic to another visible satellite, and the network adapts the channel and frequency in real time. That reaction, combined with highly directional antennas capable of concentrating the signal toward specific points, reduces the impact of interfering emitters. The researchers highlight that even if a connection is momentarily blocked, the network can restore communication from another angle or frequency almost immediately.
A thousand drones in action? The simulation was based on real data from Starlink’s orbital positioning and modeled how the signal would behave for twelve hours over eastern China. The researchers placed a virtual network of jammers 20 kilometers high, spaced between five and nine kilometers apart, as if they formed a checkerboard in the sky. The study considers that these nodes could be installed on drones, balloons or similar aerial platforms, capable of supporting coordinated interference systems. Using 26 dBW power and narrow beam antennas, each node managed to block an average of 38.5 square kilometers. With that efficiency, at least 935 units would be needed to cover a territory the size of Taiwan, not counting redundancies, failures or geographical barriers such as mountains.
The authors themselves acknowledge that their results are only an approximation. They explain that they do not have real data on the radiation patterns of the terminals or measured signal suppression coefficients, which limits the precision of the simulation. They also do not know Starlink’s internal adaptation mechanisms against coordinated interference. Even so, they consider that the model serves to estimate the scale of the necessary effort and opens a line of study that allows quantifying, although imperfectly, how a blocking strategy would work in a real scenario.
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Xataka
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Javier Marquez
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