Recent GPS signal jamming on the Korean Peninsula has revealed a serious potential threat in the U.S. Army Rifleman Radio equipment: the equipment uses non-military civilian GPS chips, which are extremely susceptible to jamming. signal jammer The exposure of this vulnerability has triggered widespread doubts about the application of low-cost civilian technology in military communication equipment and highlighted the U.S. military's technological gap in preventing enemy signal jamming.cell phone jammer

　　The use and impact of GPS jamming technology

　　The Global Navigation Satellite System (GNSS) plays a key role in the military field, and GPS satellites provide anti-jamming signals designed specifically for military use and open and easily jammed signals for civilian use. GPS jammerTo save costs, the U.S. Army chose to use chips that only receive civilian GPS signals in rifleman radios. Wifi jammerHowever, this "economic choice" makes these communication equipment extremely vulnerable to enemy jamming, which can easily lead to loss or error of location information, seriously affecting the combat efficiency and safety of infantry.drone jammer

　　According to McNeff of Overlook Systems Technologies Inc., the frequent occurrence of GPS jamming incidents has once again emphasized the structural problems of rifleman radios. Although choosing civilian chips can reduce equipment costs, they have almost no protection against signal interference and are not suitable for combat environments.

　　GPS jamming operations by North Korea and Russia

　　According to a report by the U.S. Defense Intelligence Agency, North Korea has deployed Russian-made high-power jammers, which are mounted on vehicles and can interfere with GPS signals within a range of 30 to 60 miles. The report said that North Korea is gradually developing GPS jammers with longer ranges to further weaken the positioning systems of South Korea and the United States, indicating that GPS jamming has become a strategic threat. Since 2014, Russia has jammed U.S. drones over Ukraine and helped Iran shoot down a U.S. stealth drone on the Afghan border in 2011. These events highlight the importance and destructive power of GPS jamming in modern warfare.

　　Importance of the Army Network Integration Assessment Exercise

　　The U.S. military is currently planning to conduct a network integration assessment exercise at the White Sands Missile Range in New Mexico to test the actual combat performance of rifleman radios. The exercise will test the anti-jamming capabilities of rifleman radio equipment in a real jamming environment, aiming to understand its vulnerabilities and improvement plans. McNeff called for joining the "navigation war" exercise to test the equipment's response performance under severe interference and find possible emergency solutions.

　　Popularity and challenges of small GPS jammers

　　As technology becomes more popular, small GPS jammers are becoming cheaper and easier to obtain on the Internet. Merrill of the U.S. Department of Homeland Security pointed out that these devices are not only low-cost, but also difficult to track due to their small and concealed appearance. The Coast Guard Navigation Center under the U.S. Department of Transportation also maintains a list of military test projects that may interfere with GPS signals to remind civilian users that GPS signals near the White Sands Range may fluctuate.

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　　Technical response: Improving the anti-interference ability of navigation systems

　　In response to the growing threat of GPS interference, the U.S. Defense Advanced Research Projects Agency (DARPA) has launched a number of projects focusing on communication research and development under extreme radio frequency spectrum conditions, and is committed to developing radio systems that can automatically detect interference and adapt to harsh environments. Evans, DARPA's program manager, said that future radio systems will have the ability to detect, evaluate interference and change frequencies to ensure the safe transmission of data under strong interference.