A Chaos-based Spread Spectrum Communication System

We describe the design and CMOS implementation of a baseband spread-spectrum communication system using chaotic signals for spreading digital data. The communication system uses a new chaotic modulation scheme called M-DCSK (Modified Differential Chaos Shift Keying). The M-DCSK scheme and its characteristics are analyzed for single user and multi user applications. Results from a VLSI implementation are also presented. Keywords—Chaos, Communication, CMOS, DCSK, M-DCSK, Multiple access.

[1]  G. Kolumban,et al.  Differential chaos shift keying : A robust coding for chaotic communication , 1996 .

[2]  A. Rodriguez-Vazquez,et al.  Discrete-time integrated circuits for chaotic communication , 1997, Proceedings of 1997 IEEE International Symposium on Circuits and Systems. Circuits and Systems in the Information Age ISCAS '97.

[3]  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).

[4]  A. Rodriguez-Vazquez,et al.  Integrated circuit blocks for a DCSK chaos radio , 1998, ISCAS '98. Proceedings of the 1998 IEEE International Symposium on Circuits and Systems (Cat. No.98CH36187).

[5]  Octavio A Gonzalez.  VLSI implementation of a chaotic encryption algorithm with applications to secure communications , 1998 .

[6]  Makoto Itoh,et al.  SPREAD SPECTRUM COMMUNICATION VIA CHAOS , 1999 .

[7]  L. Tsimring,et al.  Performance analysis of correlation-based communication schemes utilizing chaos , 2000 .

[8]  Zbigniew Galias,et al.  Enhanced differential chaos shift keying using symbolic dynamics , 2001, GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270).

[9]  Veikko Porra,et al.  An Experimental FM-DCSK Chaos Radio System , 2001 .

[10]  William J. Dally,et al.  Monolithic chaotic communications system , 2001, ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196).

[11]  G. Mazzini,et al.  Scanning the special issue - special issue on applications of nonlinear dynamics to electronic and information engineering , 2002, Proceedings of the IEEE.

[12]  Chi K. Tse,et al.  A multiple-access technique for differential chaos-shift keying , 2002 .