An improved nonlinear-estimation based chaotic communication scheme

In this work, an improved nonlinear estimator based scheme is introduced to enhance the performance of a previously proposed chaotic digital communication scheme. The earlier scheme was improved in two ways. First the speed of the scheme is improved by a factor greater than ten, therefore is more suitable for real time communication where all delays (including processing time) must be kept extremely small in applications such as radar communication, telephony, and videoconferencing. Second, the new scheme´s bit error rate performance is superior to that of the previous one. The key factor for the fast decoding of this new algorithm is that it is designed based on faster divergence of the estimator in case of chaotic system mismatch. Simulation results are provided and show the feasibility and superiority of our scheme over the earlier proposed one.