Department of Electronics and Communication Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Amritapuri Campus, Kerala, India.
Chaos. 2009 Sep;19(3):033102. doi: 10.1063/1.3157183.
Multiplexing of discrete chaotic signals in presence of noise is investigated. The existing methods are based on chaotic synchronization, which is susceptible to noise, precision limitations, and requires more iterates. Furthermore, most of these methods fail for multiplexing more than two discrete chaotic signals. We propose novel methods to multiplex multiple discrete chaotic signals based on the principle of symbolic sequence invariance in presence of noise and finite precision implementation of finding the initial condition of an arbitrarily long symbolic sequence of a chaotic map. Our methods work for single precision and as less as 35 iterates. For two signals, our method is robust up to 50% noise level.
研究了噪声存在下离散混沌信号的多路复用。现有的方法基于混沌同步，易受噪声、精度限制的影响，并且需要更多的迭代。此外，这些方法中的大多数都无法对超过两个离散混沌信号进行多路复用。我们提出了基于噪声存在下符号序列不变性原理和有限精度实现的寻找混沌映射任意长符号序列初始条件的新方法，以实现多路复用多个离散混沌信号。我们的方法在单精度下和少至 35 次迭代下工作。对于两个信号，我们的方法在噪声水平高达 50%时仍然稳健。
