Jammers will change the trajectory of our lives

Sometimes, if they do not arrive on time, we have to wait a long time. But now, we only send short messages or dial his mobile number. This problem can be solved simply. At that time, the Internet was not used much, so we paid great attention to the classroom. After school, we don’t have much information to check. Therefore, our knowledge only comes from manual or test work. Today, students can search for information on the Internet. Alternatively, you can download the required information. Therefore, the school is worried about this problem. They decided to install a mobile phone handheld jammer to prevent this from happening. I agree with this idea because university is one of the most important periods in our lives. So far, we have learned a lot of knowledge and information. This period may also be a turning point in our lives. If we study hard and enter a famous university, your life will change. At that time, many celebrities studied very hard. I still remember that when I was in university, I was very interested in learning geography and English. I spent a lot of time on these two issues. After graduating from high school, I studied English in a university. Then, I am looking for work related to English. Maybe my life is related to English. I think schools should install this product. Can they turn off the machine after school.

In order to interfere, the jammer transmits radio frequency power (CW + modulation) at the same frequency used by the enemy link or network. The enemy’s receiver (“listening” side) receives both the jammer’s transmission and its “partner” transmission. The strongest will prevail; if the power of the jammer is greater than the power of the “partner”, the “listener” will not be able to “understand” the message/data correctly. Alternatively, if the capability of the “partner” is greater than that of the jammer, the “listener” will probably be able to “understand” the message/data correctly, and the communication link between the “partners” will remain uninterrupted. This explanation is a bit superficial and aims to simplify things. However, if we try to “deep” this problem, we can make more parameter comparisons between the signal levels of the two “links”. An example is the SNR (signal-to-noise ratio) that the receiver “sees” on its input. Sometimes, the interference signal arriving at the receiver input may be lower than the communication signal (“partner”) and still dominate. This happens because the receiver usually needs a certain amount of “headroom” between the two input signals to be able to explain one of them (usually louder). However, in advanced communication systems, this “headroom” is sometimes even negative (meaning that the communication signal may be much weaker than the interference signal), and the receiver is still able to.