Orthogonal chaotic vector shift keying in digital communications

An orthogonal chaotic vector shift keying digital communication scheme is presented. The main characteristics of the scheme are increased data transmission rates with greatly improved robustness and an increase in security of communications links because of the structure of the scheme and the nature of the message bearer. Compared with some existing schemes, for example, quadrature chaos shift keying (QCSK) reported in the literature, the noise rejection is improved by an increase in the 'inter-symbolic separation'. Furthermore, a new method of characterising non-linear processing elements in complex communication schemes has been presented. Based on this, a simple modelling and evaluation method to determine the bit error rates of these schemes is derived. Various simulated results are presented to demonstrate these achievements.

[1]  Wen Yu,et al.  Robust chaotic communication via high gain observer , 2008 .

[2]  Michael Peter Kennedy,et al.  The role of synchronization in digital communications using chaos. II. Chaotic modulation and chaotic synchronization , 1998 .

[3]  Carroll,et al.  Synchronization in chaotic systems. , 1990, Physical review letters.

[4]  T. Carroll,et al.  Synchronizing hyperchaotic volume-preserving maps and circuits , 1998 .

[5]  Michael Peter Kennedy,et al.  FM-DCSK: A robust modulation scheme for chaotic communications , 1998 .

[6]  Ii Leon W. Couch.  Digital and analog communication systems , 1983 .

[7]  Zbigniew Galias,et al.  Quadrature chaos shift keying , 2001, ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196).

[8]  C. Williams.  Robust chaotic communications exploiting waveform diversity. part 2: Complexity reduction and equalisation , 2008, IET Commun..

[9]  C. Williams,et al.  Robust chaotic communications exploiting waveform diversity. part 1: Correlation detection and implicit coding , 2008, IET Commun..

[10]  Mischa Schwartz,et al.  Information transmission, modulation, and noise , 1959 .

[11]  Wen-Wei Lin,et al.  Digital Secure-Communication Using Robust Hyper-Chaotic Systems , 2008, Int. J. Bifurc. Chaos.

[12]  Carroll,et al.  Driving systems with chaotic signals. , 1991, Physical review. A, Atomic, molecular, and optical physics.

[13]  Gualberto Solís-Perales,et al.  A chaos-based communication scheme via robust asymptotic feedback , 2001 .

[14]  Cuomo,et al.  Circuit implementation of synchronized chaos with applications to communications. , 1993, Physical review letters.

[15]  Ilse Cervantes,et al.  Stability of Observer-Based Chaotic Communications for a Class of Lur'e Systems , 2002, Int. J. Bifurc. Chaos.

[16]  Michael Peter Kennedy,et al.  Recent advances in communicating with chaos , 1998, ISCAS '98. Proceedings of the 1998 IEEE International Symposium on Circuits and Systems (Cat. No.98CH36187).

[17]  John G. Proakis,et al.  Digital Communications , 1983 .

[18]  Tambe,et al.  Driving systems with chaotic signals. , 1992, Physical review. A, Atomic, molecular, and optical physics.

[19]  Michael Peter Kennedy,et al.  The role of synchronization in digital communications using chaos. I . Fundamentals of digital communications , 1997 .

[20]  Alan V. Oppenheim,et al.  Circuit implementation of synchronized chaos with applications to communications. , 1993, Physical review letters.

[21]  Harold Kolimbiris.  Digital communications systems , 1999 .