一种混沌跳频序列构造方法

提出了无需进行门限量化,直接将混沌映射轨道点的实数值表示为二进制小数,然后利用比特抽取产生跳频序列的新方法。理论分析和统计性能实验表明,在相同的条件下(频率数目和序列长度相同),该跳频序列的平衡性、跳频间隔和最大汉明相关值与其它方法产生的混沌跳频序列相当,然而其所需的迭代次数却可大大减少,并且可以极大地增强系统抗干扰、抗截获的能力,因此非常适合在跳频多址通信中应用。

Design of frequency-hopping sequences based on chaotic map

Based on the chaotic map,a novel method to generate frequency-hopping(FH)sequences was proposed.The chaotic real-valued sequences of nonlinear maps were directly encoded to bit sequences rather than by a threshold function,then chaotic FH sequences by reshaping bits of these bit sequences were obtained.The performance analysis and experiment results show that the sequence has the same balance properties,FH distance and maximum Hamming correlation as other FH sequences when they have the same FH number and period length,but much less requirements of iterative operation and much more anti-jamming and anti-intercept capacities.It can be concluded that the FH sequences generated by the new method are suitable for FH code-division multiple-access systems.