Design of frequency-modulated correlation delay shift keying chaotic communication system

Considering the shortcomings of differential chaos shift keying (DCSK) with bad secrecy and low data transfer rate, this study designs and researches a new chaos shift keying digital modulation scheme – frequency-modulated correlation delay shift keying (FM-CDSK). The scheme has both the merits of CDSK and FM-DCSK. This study provides the particular theoretical derivation of the principle of modulation and demodulation. The simulation analysis of data transmission rate and confidentiality verify that this new scheme has more superior performance than DCSK and CDSK, and the transmission rate is twice as much as original shift keying schemes. Meanwhile, this new chaos shift keying scheme perfectly achieves the secrecy transmission of image signal. It can be clearly seen that this scheme is realisable in digital secure communication.

[1]  Liang Zhan-Hong.  A hybrid secure communication method based on the synchronization of hyperchaos systems , 2005 .

[2]  M. Delgado-Restituto,et al.  A mixed-signal integrated circuit for FM-DCSK modulation , 2004, Proceedings of the 30th European Solid-State Circuits Conference.

[3]  Gonzalo Álvarez,et al.  Breaking two secure communication systems based on chaotic masking , 2004, IEEE Transactions on Circuits and Systems II: Express Briefs.

[4]  Guanrong Chen,et al.  Promising performance of a frequency-modulated differential chaos shift keying ultra-wideband system under indoor environments , 2010, IET Commun..

[5]  Chi K. Tse,et al.  Analysis of bit error rates for multiple access CSK and DCSK communication systems , 2003 .

[6]  Hui Li,et al.  UWB DCSK system design and simulation , 2009, 2009 International Conference on Test and Measurement.

[7]  Jiangang Zhang,et al.  A New Multistage Chaos Synchronized System for Secure Communications , 2009, 2009 Fifth International Conference on Natural Computation.

[8]  Michael Peter Kennedy,et al.  FM-DCSK: a novel method for chaotic communications , 1998, ISCAS '98. Proceedings of the 1998 IEEE International Symposium on Circuits and Systems (Cat. No.98CH36187).

[9]  Michael Peter Kennedy,et al.  Performance evaluation of FM-DCSK modulation in multipath environments , 2000 .

[10]  Timothy J. Wren,et al.  Orthogonal chaotic vector shift keying in digital communications , 2010, IET Commun..

[11]  Anthony J. Lawrance,et al.  Performance Analysis and Optimization of Multi-User Differential Chaos-Shift Keying Communication Systems , 2006, IEEE Transactions on Circuits and Systems I: Regular Papers.

[12]  Zhang Li.  Performance analysis of hyperchaotic FM-DCSK secure communication system , 2008 .

[13]  Zhu Yi-sheng.  A Kind of Method for Enhancing the Transmission Efficiency in FM-DCSK , 2005 .

[14]  Yoshifumi Nishio,et al.  Noncoherent Correlation-Based Communication Systems Choosing Different Chaotic Maps , 2007, 2007 IEEE International Symposium on Circuits and Systems.