Anti-Jamming Performance of Chaos-Based Digital Communication Systems Under Narrowband Sine-Wave Jammers

In the previous chapters, we have described in detail the major digital modulation schemes that exploit chaotic signals as information carriers, and discussed the analytical approaches for evaluating performance. In this and the next chapters, we focus our attention on an important performance aspect for spread-spectrum communication systems, namely, anti-jamming capability [Peterson et al. (1995)]. Intuitively, any coherent system, where the receiver knows or is able to reproduce the chaotic carriers, is expected to be considerably better in anti-jamming than its non-coherent counterpart. In chaos-based communications, coherent systems suffer serious drawbacks due to the fragility of chaos synchronization which is the main technique for reproducing the chaotic carriers [Chen and Yao (2000)]. Non-coherent systems are practically more favourable although their noise performance is inherently worse than coherent systems. It is therefore of interest to study thoroughly the anti-jamming properties of chaos-based communication systems in order to gain a better understanding of how well or poorly, in exact quantitative terms, a practical non-coherent chaotic communication system performs in comparison with the theoretically better coherent systems.