混沌信号加速度模糊函数算法

Reverse-Time Chaos Based Scheme for Calculating Wideband Ambiguity Functions of chaotic signals

该文基于线性反时间混沌理论和信号的动力系统表示理论,将时间尺度变化宽带信号的产生同动力学系统结合,提出利用线性反时间混沌理论的混沌信号加速度模糊函数的计算方法。该方法首先通过不同时钟频率的数字系统产生脉冲信号,然后以此脉冲信号驱动相应的线性系统直接产生延迟和时间尺度变换后的反时间混沌信号,最后可通过相关处理方便的计算相应混沌信号的宽带模糊函数。

This paper develops a reverse-time chaos based scheme for calculating Acceleration Ambiguous Function （AAF） of a chaotic signal. By exploiting the reverse-time chaos theory and the generating dynamics of the chaotic signal, it is found that the timedelay and time-scaling chaotic signal can be generated by a corresponding linear system. With this observation, the AAF diagrams can be accurately obtained by following the conventional correlation operation. A distinct characteristic of the proposed scheme is that the generation of the tinie-delay and time-scaling versions is implemented in analog way, while the correlation operation can be implemented in digital way.