ABSTRACT
This chapter describes the digital chaotic modulation schemes using the basis functions approach. It also describes the state of the art in digital modulation schemes which use chaotic rather than periodic basis functions. The chapter discusses the problems and opportunities arising from the non-periodicity of chaotic signals, proposes solutions and identifies potential application domains. By maintaining a constant energy per symbol, FM-Differential Chaos Shift Keying (FM-DCSK) can achieve the noise performance of DCSK, without an artificial upper bound on the data rate. FM-DCSK has the best noise performance of all known digital chaotic modulation schemes. A chaotic signal generator automatically produces a wideband noiselike signal with robust and reproducible statistical properties. Due to its wideband nature, a modulation scheme using chaotic basis functions is potentially more resistant to multipath propagation than one based on sinusoids.
