Repressive Interference Of Radio Signals Research And Verification

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.