Over the years, the way we communicate has changed dramatically. From handwritten letters to e-mails to smoky signals and text messages, technological advances have dramatically changed the way information is exchanged. One of the most pioneering inventions in the communications field may be the discovery of wireless signal transmission. Not surprisingly, this development involves a pair. In this case, it is the science of signal interference. In other words, if the frequency of the device collides with another signal of the same frequency and higher power, signal interference will occur. In this case, the receiving device cannot process the signal correctly and cannot work normally.
Signal interference was common during World War II and the Cold War. In addition to preventing news from reaching the intended country, broadcast interference was also spreading at the time. During the Cold War, transmitters from the Soviet Union and the West even participated in a "power race," and signal jammer tried to increase their broadcast power. After the cold war ended, the situation began to change. When the Soviet Union withdrew from power, the Western military generally had more traction and control over innovative technologies. However, because there is no need for "signal warfare", signal interference is classified as illegal in many countries, except for government, military, and defense applications.
The interference signal may be caused by mechanical or electrical interference. The main differences between them are explained below. This technique is an ancient disease. This technology uses bait, mirrors, rice husks and other equipment to reflect the signal back, and then reflect it back to the source, so as to get the wrong return. These devices are very eye-catching. For example, corner reflectors are usually attached to decoys (or moving objects designed to confuse radar operators) to make them look like real airplanes. On the other hand, rice husks are made of aluminum glass fibers of different lengths. All of these are valid, but not very accurate. This may defeat the purpose of strengthening the invisible signal barrier.
Portable jammer use noise or repeater technology to send jamming and high-density signals to the radar or receiver. Noise interference is divided into three types: speckle, frequency sweep and barrage. Speckle interference is a concentrated symptom that attacks a specific channel or frequency. It is often difficult to track because it is difficult to identify the specific frequencies that are affected during a speckle jamming attack. However, the secondary disadvantage is that the strategy is limited to interference frequencies.