Design and implementation of enhanced permutation index differential chaos shift keying system

In standard PI-DCSK, information is transmitted by sending reference chaotic signal followed by information bearing signal, which is simply a permutated version of the reference signal. Permutation is performed based on a specific data map. In this paper, a developed version of (PI-DCSK) is presented and tested in AWGN and multipath Rayleigh fading channels environment. Information bearing signal is generated by mapping first set of information bits to the reference bit while the second set is mapped to the permutated-time reversed version of same reference signal. Both versions is added together on the same time slot. At the receiver, each incoming signal undergoes two operations; permutation and time reversal followed by permutation to detect the two different sets of information. This arrangement offers high data rate and reduce the energy requirement utilizing the low cross correlation between the chaotic signal and its time reversed version. The bit error performance is studied using baseband system model and analytically tested using Gaussian Approximation (GA) method. System performance is evaluated analytically to predict the Bit Error Rate (BER) using computer simulations. Results show that system performance is outperform the recent developed one by an average of at 2.25 dB while outperform the other standard chaos based scheme by an average of at same E-b/N-0. Moreover, the analytical form which are developed to predict the BER is validated by simulation. (C) 2021 Elsevier B.V. All rights reserved.