Performance analysis of a coherent chaos-shift keying technique

The transmission of binary information by using chaotic switching named as chaos-shift keying (CSK) with the generation of chaos using cubic map is presented. A system has been proposed for calculating the analytical bit-error rate (BER) of a coherent chaos-shift keying (CSK) digital communication system under an additive white Gaussian noise environment with the consideration of ideal synchronization at the receivers. The bit-error rate of the CSK system is compared with the conventional modulation techniques like ASK, FSK, and PSK. Generating the chaos with the simple cubic map, it is shown that the performance of coherent CSK system can be improved with the variations of the initial conditions of chaos generation. The bit-error rate of the CSK system is improved for both single-user and multiple-user environment.