| With the development of modern communication technology, the use of high-tech means of the radio technology for cheating in the exam appeared unceasingly, specialization, collectivization, the network situation, serious damage to the justice and fairness of the exam environment, bring about great negative influence to the society.Cheating in the exam by radio technology has the following characteristics: within the wide band random use frequency; Launch time is short; More and more use of digital signal, a single transfer launch time less than 2 seconds, sometimes more than one hundred Chinese characters; Mainly for the exam period, in the service of the examinee, have timeliness, regional characteristic.We analyze the existing monitoring and interference disposal method, found that these systems currently focuses on daily radio monitoring, timeliness, regional is not very strong, for exam security work, rapid disposal of the function of the signal is not strong, the use is not convenient. To this, by analyzing the receiver performance, combined with test to ensure the actual experience, analysis and design a set of radio signal processing system quickly, by establishing database of signal characteristics, radio signals were collected and compare the data in a database, quickly find distinguish illegal cheating signal, greatly improves the speed of the cheating signal reconnaissance, interference disposal efficiency, to prevent use of radio technology work provide a powerful tool for cheating in the exam. |
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