A Novel Demodulation Method for Chaotic Parameter Modulation

2006 ◽  
Author(s):  
Maoge Xu ◽  
Yaoliang Song ◽  
Liwei Liu
Keyword(s):  
Parameter Modulation ◽  
Chaotic Parameter ◽  
Demodulation Method

scholarly journals Design of Chaotic Bifurcation Parameter Modulation Scheme using Mean Value Estimation

2018 ◽  
Vol 1 (1) ◽  
pp. 52-61
Author(s):  
Hikmat Najem Abdullah ◽  
Ibrahim Fahmi Ali
Keyword(s):  
Spread Spectrum ◽  
Chaotic Map ◽  
Mean Value ◽  
Direct Sequence Spread Spectrum ◽  
Modulation Scheme ◽  
Manufacturing Cost ◽  
Bifurcation Parameter ◽  
Parameter Modulation ◽  
Value Estimation ◽  
Chaotic Parameter

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).  

scholarly journals DESIGN OF A HYPERCHAOTIC CRYPTOSYSTEM BASED ON IDENTICAL AND GENERALIZED SYNCHRONIZATION

1999 ◽  
Vol 09 (10) ◽  
pp. 2027-2037 ◽  
Author(s):  
MICHELE BRUCOLI ◽  
DONATO CAFAGNA ◽  
LEONARDA CARNIMEO ◽  
GIUSEPPE GRASSI
Keyword(s):  
Communication System ◽  
Complex Dynamics ◽  
Generalized Synchronization ◽  
Parameter Modulation ◽  
Low Degree ◽  
Chaotic Signals ◽  
Simulation Results ◽  
Modulation Methods ◽  
Chaotic Parameter

In this paper identical and generalized synchronization and the complex dynamics of hyperchaotic circuits are exploited for designing reliable cryptosystems. Since chaotic additive masking, chaotic switching and chaotic parameter modulation methods can have a low degree of security, an attempt to overcome this drawback is made by utilizing hyperchaotic circuits which make available several chaotic signals. Some of these signals are used to properly synchronize the encrypter and the decrypter in an identical and generalized way. Other chaotic signals are considered for encrypting and decrypting the information messages by means of a multishift cipher scheme. The approach is applied to a communication system constituted by an encrypter and a decrypter each consisting of two coupled Chua's circuits, unidirectionally coupled with two coupled Chua's oscillators. Simulation results are reported to show the performance of the suggested cryptosystem.

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