Method And Simulation Of Noise Jamming For The Digital Communication System

Striving for electromagnetism advantage for being able to concentrate a strengthon modern war under the very bad electronic warfare environment, it needs toimplement jamming to enemy on the premise of ensuring that one's own sideexchanges message smoothly. when jamming is effective, useful information is metwithcompletelydestroyingtheenemy'sregularcommunication.General digital communication process and principle is studied first, Take thesimulation of various signal as the basis: 2ASK,2FSK,MFSK,2PSK,2DPSK,QPSK, then introduced a few communication jamming , Explain some basic methodandconceptofthejamming.The three noise amplitude modulation jamming models are introduced, basebandgauss noiseis acquiredbyusingtheGaussian whitenoisewhich gates throughthelowpass filter. And then it is amplitude modulation. By choosing the different filters, wecould get the broadband and narrow band noise amplitude modulation. Shifting thecenter frequencyofnarrowbandsignal,wecould get themulti-frequencynarrowbandnoisejamming.Finally the various modulation ways are carried out in the different formssimulation with the noise jamming: the broad band noise jamming, narrow noisejamming,multi-frequencynarrowbandnoisejamming,thesimulationresultsaregivenout. Finally we discuss the jamming effect in the form of plot the figure between biterrorrateandJSR,carryoutthebestjammingcombiningwithsimulation.