论文信息 - Realization of orthogonal codes in optical information processing

Realization of orthogonal codes in optical information processing

Spread spectrum (SS) has proven to be an efficient transmission scheme due to its antijamming and interference reduction capability. In multiuser environment, users are assigned distinguishable unique codes with low cross correlation (CC) values among each other. Walsh-Hadamard codes are an important class of spreading codes that allow construction of long sequences with desired cross correlation values. Optical realization of Walsh-Hadamard codes becomes important for optical code division multiple access (CDMA). Design needs the use of nonlinear optics capable of handling multivalued signal. To this aim, this paper proposes an all-optical design of Walsh-Hadamard codes that exploit the polarization properties of light.

S. P. Maity | G. K. Maity

[1] Branislav M. Popovic. Spreading sequences for multicarrier CDMA systems , 1999, IEEE Trans. Commun..

[2] J. N. Roy,et al. All-optical Manchester code generator using TOAD-based D flip-flop , 2012, 2012 International Conference on Devices, Circuits and Systems (ICDCS).

[3] J. N. Roy,et al. TOAD-based all-optical gold code generator , 2012, 2012 International Conference on Devices, Circuits and Systems (ICDCS).

[4] Tanay Chattopadhyay,et al. DESIGNING OF ALL-OPTICAL TRI-STATE LOGIC SYSTEM WITH THE HELP OF OPTICAL NONLINEAR MATERIAL , 2008 .

[5] Gregory W. Wornell. Spread-signature CDMA: efficient multiuser communication in the presence of fading , 1995, IEEE Trans. Inf. Theory.

[6] Santi P. Maity,et al. On optimization of CI/MC-CDMA system , 2009, 2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications.

[7] Y Li,et al. Optical binary coded ternary arithmetic and logic. , 1986, Applied optics.

[8] B. Popović. Spreading sequences for multi-carrier CDMA systems , 1997 .

[9] S Liu,et al. Optoelectronic multiple-valued logic implementation. , 1989, Optics letters.

[10] Li Li,et al. All-optical switch and limiter based on nonlinear polarization in Mach–Zehnder interferometer coupled with a polarization-maintaining fiber-ring resonator , 2006 .