Aiming at the growing phenomenon of cheating in exams using radio-technology, the paper introduces a radio anti-cheat system. It monitors the frequency band occupied by cheating signal (voice signal mostly), and then fires interfering signals in the corresponding frequency band so as to achieve the purpose of suppressing the cheating signal. The performance of interfering signals is very important and determines whether interference module can complete the purpose of preventing cheating or not. We analyze and simulate several interfering signals and choose the optimal form in this paper, providing a theoretical basis for the specific implementation of the system.
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