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无线电信号压制性干扰研究与验证
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摘要
随着科学技术的不断发展,尤其是通信技术的突飞猛进,无线通信产品和设备的使用越来越广泛,依赖度也越来越高,同时也带来了无线通信信号相互干扰、频段使用不规范等诸多问题,给管理上造成了很大的麻烦。同时出于国家安全考虑,对于一些有害的无线信号应进行管控。因此对于这些不规范的无线电信号如何进行压制,对创造一个良好的通信环境具有重要的意义。
     理论研究已经证实,对于不同的无线电通信调制方式,有着不同的最佳干扰样式,它的干扰效果也不一样,在研究干扰对各种无线电通信影响时,应充分考虑选择干扰样式,使之效果最佳,即所谓的最佳干扰。对于不同的无线通信信号(不同的调制方式)必定存在着不同的“较佳”干扰样式。但是否一定存在最佳干扰样式,这是一个比较复杂的问题。问题的复杂性首先在于干扰效果的评价往往带着不确定及主观因素,其次在于问题本身的理论也很复杂。目前,世界各国大都主要还是采用实验与理论相结合的方法来研究这个问题。
     论文通过分析通信干扰的特点、种类以及信号调制原理,对通信干扰样式进行了研究,并从信号的产生、传播,以及干扰机和发射机的特性参数出发,分析了影响干扰效果的各种因素,总结了常见模拟和数字信号的最佳干扰样式,对AM、FM、SSB等模拟信号以及2ASK、2FSK、2PSK等数字信号的各种干扰样式进行了仿真分析;并通过发射接收实际信号模拟了整个信号干扰的过程,对理论分析和仿真结果进行了验证。对干扰效果的评估总结了一套建立在信号相关度、误码率计算以及相关度比较基础上的评估方法。对干扰效果评判进行了有意义的尝试,通过实验表明具有较高的的应用价值。
The wireless communication products and equipment are wider and wider used, with fast development of science technology, especially the communication technology, which was more and more replied, meanwhile bringing the use of wireless signal not in order and spectrum not in regular way. It turns out a lot of problem in management. Considering the national security, some of the harmful signals must be stopped to keep the society harmonious and stable. How to interfere these unregular signals has always being attentioned, which is significant to create a very good communication environment.
     We have the theoretical know that radio communication for different modulation methods, with different optimal interference pattern, its interference effect is not the same as in the study interference pairs of various radio communication had impacted O'clock should be fully considered to choose interference patterns, so that The best, the best so-called interference. For different wireless communication signal (modulation in different ways) that there must be different "better" interference pattern. But if there must be the best interference pattern? This is a very complex issue. First, the complexity of the problem is the evaluations of interference effects with uncertain and subjective factors are often followed by the theory that the problem itself is complex. So now, most countries in the world using the combination of experimental and theoretical methods to study this problem.
     Through analyzing the characteristics of communication interference, modulation types and signal theory, communications interference patterns are analyzed and studied, analyzed the effect of various factors affecting interference, summed up the common analog and digital signal interference pattern the best, on AM, FM , SSB and other analog signals and 2ASK, 2FSK, 2PSK various interferences such as digital signal patterns were simulated; and by transmitting and receiving signals to simulate the actual process of the signal interference, on the theoretical analysis and simulation results of the verification, fruitful conclusion. Interference effects on a summary assessment based on analysis of interference power, error rate and the relevance assessment on the basis of comparison. Evaluation of the interference effect was significant attempt, an experiment that has a high application value.
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