基于附加频移跳频的方案设计及其性能分析

Design of Frequency-hopping Scheme Based on Additional Frequency Shift and Analysis on Its Performance

为了提高跳频系统的抗预测性能,增大抗跟踪干扰能力,提出了基于附加频移的跳频通信。在给定跳频带宽内,该方案通过双序列的控制输出射频频率来提高其跳变复杂度,从而增大敌方对于跳频序列的正确建模和预测难度。基于混沌特性的分析方法,对采用L-G非连续抽头模型和Logistic-Kent级联映射构造的合成跳频序列的复杂度进行了计算,与相同模型下构造的常规跳频序列相比,基于附加频移的跳频通信均具有更大的复杂度。

To improve the performance of anti-forecasting and enhance the capability of antifollower jamming of Frequency Hopping （FH） system,the FH communication based on additional frequency shift is proposed. In the given FH bandwidth,the complexity of hopped radio frequency is improved under the control of dual-sequence. Thus, this scheme increases the difficulty of modeling and forecasting of FH sequence for enemies.Based on the analysis of chaotic features,the FH complexity is calculated. Compared with the conventional FH system,the results indicate that the FH sequence based on additional frequency shift has greater complexity by the L-G discontinuous tap model and Logistic-Kent cascade mapping.