Multipath propagation and amplitude damping are unavoidable physical phenomena in wireless communication systems. The first causes intersymbol interference in the information signal leading to problems in the decoding of information at the receiver end. The second signifies loss of communication at receiver end. The chapter presents numerical evidences that the multipath propagation and amplitude damping do not alter the largest positive Lyapunov exponent of some chaotic discrete maps. It discusses results of simulations illustrating how one could use this property to create a chaos-based communication system that is robust to multi-path propagation and amplitude damping. Compared to its air-based wireless communication counterpart, the underwater communication suffers from the large amplitude damping and from serious multi-path propagation. The damping effect can be diminished by the use of acoustic signals. However, due to the low sound speed, the multi-path propagation becomes a more serious issue. The chapter proposes a possible solution for this by the use of chaotic signals.
|Title of host publication
|Chaotic Signals in Digital Communications
|Marcio Eisencraft, Romis Attux, Ricardo Suyama
|Number of pages
|Published - 2017