数字无线电信号侦测系统的设计与实现
发布时间：2018-11-11 21:59
【摘要】：随着科学的进步,社会的发展,现代无线电通信技术在社会发展过程中得到广泛的应用,人们的生活已经离不开无线电通信,但伴随而来的是通过利用高科技无线电技术进行考试作弊的手段不断翻新,呈现专业化、集团化、网络化态势,严重破坏了公平和公正的考试环境,给社会带来了极大的负面影响。利用无线电技术进行考试作弊有以下几个特点：在很宽的频段内随机使用频率；发射时间短；越来越多使用数字信号,单次发射时间有时不到2秒、传送一百多汉字；主要用于考试期间,服务于考生,具有时效性、地域性特点。我们分析现有监测和干扰处置手段,发现目前这些系统主要针对日常无线电监测,时效性、地域性不是很强,针对考试保障工作方面,信号的快速处置功能不强,使用不方便。对此,通过分析接收机性能,结合考试保障实际经验,分析和设计出一套无线电信号快速处理系统,通过建立信号特征数据库,将采集到的无线电信号与数据库的里的数据进行比对,快速查找分辨出非法的作弊信号,大幅度提高了作弊信号侦察的速度、干扰处置效率,为防范利用无线电技术进行考试作弊工作提供一种有力工具。
[Abstract]:With the progress of science and the development of society, modern radio communication technology has been widely used in the process of social development. But with it, the means of cheating through the use of high-tech radio technology are constantly renovated, showing a trend of specialization, collectivization, and networking, which seriously undermines the fair and just examination environment. Has brought great negative influence to the society. Using radio technology to cheat in the examination has the following characteristics: random use frequency in a wide frequency range, short transmission time, more and more digital signals, sometimes less than 2 seconds in a single transmission time, more than 100 Chinese characters transmitted; Mainly used in the examination period, serving candidates, with timeliness, regional characteristics. We analyze the existing monitoring and interference disposal methods, and find that these systems are mainly aimed at daily radio monitoring, timeliness, regional nature is not very strong, for the test guarantee work, the signal fast processing function is not strong, not easy to use. In this paper, by analyzing the performance of the receiver and combining the practical experience of the test guarantee, a set of radio signal fast processing system is analyzed and designed, and the signal characteristic database is established. By comparing the collected radio signals with the data in the database, we can quickly find and distinguish illegal cheating signals, which greatly improve the speed of detection of cheating signals and the efficiency of jamming disposal. To prevent the use of radio technology to cheat in the examination to provide a powerful tool.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN98
，
本文编号：2326261
[Abstract]:With the progress of science and the development of society, modern radio communication technology has been widely used in the process of social development. But with it, the means of cheating through the use of high-tech radio technology are constantly renovated, showing a trend of specialization, collectivization, and networking, which seriously undermines the fair and just examination environment. Has brought great negative influence to the society. Using radio technology to cheat in the examination has the following characteristics: random use frequency in a wide frequency range, short transmission time, more and more digital signals, sometimes less than 2 seconds in a single transmission time, more than 100 Chinese characters transmitted; Mainly used in the examination period, serving candidates, with timeliness, regional characteristics. We analyze the existing monitoring and interference disposal methods, and find that these systems are mainly aimed at daily radio monitoring, timeliness, regional nature is not very strong, for the test guarantee work, the signal fast processing function is not strong, not easy to use. In this paper, by analyzing the performance of the receiver and combining the practical experience of the test guarantee, a set of radio signal fast processing system is analyzed and designed, and the signal characteristic database is established. By comparing the collected radio signals with the data in the database, we can quickly find and distinguish illegal cheating signals, which greatly improve the speed of detection of cheating signals and the efficiency of jamming disposal. To prevent the use of radio technology to cheat in the examination to provide a powerful tool.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN98
，
本文编号：2326261
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