CAJ | 학술논문

为增强调制跳变技术的抗截获性能, 提出一种基于时间信息(TOD)的宽间隔混沌调制跳变图案设计方法. 针对周期抽取法构造的混沌跳变序列在均衡性方面的缺陷, 提出采用改进的周期抽取与多比特抽取结合的方法产生迭代式TOD混沌跳变序列,并分析验证了该方法良好的均衡性. 为进一步完善抗截获性能, 采用对偶法和随机平移替代法对跳变图案进行宽间隔处理. 仿真结果表明, 对偶法在长周期条件下的性能优于随机平移法, 适用于产生正常通信使用的调制跳变图案;随机平移法在最大有效周期长度范围内具有很好的均衡性, 适用于短周期突发通信.
위증강조제도변기술적항절획성능, 제출일충기우시간신식(TOD)적관간격혼돈조제도변도안설계방법. 침대주기추취법구조적혼돈도변서렬재균형성방면적결함, 제출채용개진적주기추취여다비특추취결합적방법산생질대식TOD혼돈도변서렬,병분석험증료해방법량호적균형성. 위진일보완선항절획성능, 채용대우법화수궤평이체대법대도변도안진행관간격처리. 방진결과표명, 대우법재장주기조건하적성능우우수궤평이법, 괄용우산생정상통신사용적조제도변도안;수궤평이법재최대유효주기장도범위내구유흔호적균형성, 괄용우단주기돌발통신.
In order to enhance the anti-interception performance of modulation-hopping technology, a method to design wide-gap chaos modulation hopping pattern based on time of day (TOD) is proposed. According to the deficiency of the cycle extraction algorithm in the balance, an improved algorithm combining the cycle extraction and reshaping operation is presented to design Chaos modulation hopping pattern. The analysis and simulation results verify this method has better properties in balance. Furthermore, in order to perfect the anti-interception property, symmetry algorithm and random shift replace algorithm are introduced to widen the modulation hopping pattern gap. Simulation results prove that symmetry algorithm is applicable for generating the long periodic hopping pattern used in valid data communications, while random shift replace algorithm is proper for the short periodic pattern with the good balance in the range of maximum effective length, and it can be used in the situations of short-cycle emergency communications.