Cognitive radio networks (CRNs) allow coexistence of unlicensed users (UUs) and licensed users (LUs) and hence, mutual\ninterference between UUs and LUs is neither ignored nor considered as Gaussian-distributed quantity. Additionally, exploiting\njamming signals to purposely interfere with signal reception of eavesdroppers is a feasible solution to improve security performance\nof CRNs.This paper analyzes reliability-security trade-off, which accounts for maximum transmit power constraint, interference\npower constraint, jamming signal, and Rayleigh fading, and considers interference fromLUs as non-Gaussian-distributed quantity.\nToward this end, exact closed-form expressions of successful detection probability and successful eavesdropping probability, from\nwhich reliability-security trade-off is straightforwardly visible, are first suggested and then validated by Monte-Carlo simulations.\nVarious results demonstrate that interference from LUs considerably decreases both probabilities while jamming signal enlarges\nthe difference between them, emphasizing its effectiveness in improving security performance.
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