Abstract
In this paper, the bifurcation parameter of the chaotic map is estimated accurately by utilizing the ergodic properties of a chaotic dynamical signal. Binary Phase Shift Keying Ergodic Chaotic Parameter Modulation (BPSK-ECPM) scheme is used to modulate the information signal in the bifurcating parameter of the chaotic map. A mean value estimation technique is used at the receiver to retrieve the original information accurately. This method minimizes the computational complexity of the receiver; thereby, reduces the total manufacturing cost. Simulation results confirm that, in AWGN channel and at bit error rate (BER) of 10-3, BPSK-ECPM achieves gains in Eb/N0 of about 0.7dB and 5dB in comparison with conventional direct sequence spread spectrum with BPSK modulation (DS-SS BPSK) and conventional ergodic chaotic parameter modulation spread spectrum (ECPM-SS) systems respectively. The results also confirm that in Rayleigh fading channel and at BER of 10-3, BPSK-ECPM achieves gains in Eb/N0 of about 6.3dB and 1.6dB in comparison with DS-SS BPSK and ECPM-SS systems respectively, which make BPSK-ECPM an ideal candidate for the intelligent transportation system (ITS).
Highlights
Applications of chaotic signals in communication systems got a great attention
As shown in Figure (2), at bit error rate (BER) =10-3, BPSK-ergodic chaotic parameter modulation scheme (ECPM) scheme achieves a gain in Eb/N0 of about 0.7 dB as compared with conventional DS-spread spectrum (SS) BPSK system
The ergodic approach can be improved by combining it with the standard BPSK modulation which results in BPSK-ECPM system model
Summary
Applications of chaotic signals in communication systems got a great attention. Many active ongoing researches have been looking at ways to exploit the properties of chaotic signals in chaotic communication schemes and have got a quite remarkable results. The above mentioned characteristic of chaotic signals make it attractive for communication use since it offers good and cheaper substitution to conventional SS communication systems [1,2]. Different chaotic modulation systems have been presented to exploit different properties of a chaotic dynamical system to obtain the aim of SS transmission [3,4,5,6,7,8]. One of the most important chaotic modulation systems is chaotic parameter modulation (CPM) schemes [4]
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