CAJ | 학술논문

针对单门限变换域通信系统往往无法兼顾抗干扰和隐蔽通信的问题,提出了一种基于双门限变换域通信系统基函数幅度谱的设计方法。该方法首先在干扰存在情况下进行单门限系统最优误码率门限与最差误码率门限的判断,然后通过参数灵活调整两个门限的值,将大于高门限和低于低门限的值分别设为0和1,位于双门限之间的频谱进行倒置,得到的基函数通过对数据进行调制实现通信。仿真结果表明：相比于单门限变换域通信系统,通过参数调节后的双门限变换域通信系统可以同时具有良好的抗干扰及隐蔽通信性能。
침대단문한변환역통신계통왕왕무법겸고항간우화은폐통신적문제,제출료일충기우쌍문한변환역통신계통기함수폭도보적설계방법。해방법수선재간우존재정황하진행단문한계통최우오마솔문한여최차오마솔문한적판단,연후통과삼수령활조정량개문한적치,장대우고문한화저우저문한적치분별설위0화1,위우쌍문한지간적빈보진행도치,득도적기함수통과대수거진행조제실현통신。방진결과표명：상비우단문한변환역통신계통,통과삼수조절후적쌍문한변환역통신계통가이동시구유량호적항간우급은폐통신성능。
For the problem that single threshold transform domain communication system ( TDCS ) cannot possess anti-jamming and covert communication property at the same time,a method of designing the spec-trum amplitude of basis function based on double-threshold is proposed in transform domain communication system. With the coexistence of jamming, the thresholds of optimal and worst bit error rate ( BER ) are judged,then by adjusting the two thresholds through parameter, the spectrum amplitude above the upper threshold is marked as 0,below the lower threshold is marked as 1,while between the double thresholds, the spectrum amplitude is inverted,and finally TDCS implements communication by modulating data on the basis function. Simulation results show that compared with single-threshold transform domain system com-munication,the double-threshold TDCS through adjusting the parameter can achieve good performance of anti-jamming and covert communication at the same time.