Software Code for Modified Prime Code Family for Optical CDMA

Technology #ua10-086

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Mohammad Karbassian
Postdoctoral Research Associate I, Optical Sciences
Franko Kueppers
Assistant Professor, Optical Sciences
Managed By
Amy Phillips
Sr. Licensing Manager (520) 621-9579

Invention:  Researchers at the University of Arizona have developed a novel spreading/address code family for high-speed, large-capacity wired/wireless or optical communications.  The novel “transposed modified prime codes” (T-MPC) have specific correlation properties and flexible code size, length and weight.  This code family is comparable to existing spreading code families in terms of correlations, bit-error rate (BER) performance and cardinality, but. increases the cardinality up to twice that of existing prime code families.  Thus, a greater number of users can be accommodated in the system. There is no time-shift feature in T-MPC as in MPC, so the code is not predictable and thus secure.


Background:  Multiple access techniques are required to meet the demand for high-speed and large-capacity communications in optical networks in which multiple users are allowed to share the network resources like bandwidth.  Optical code-division multiple-access (OCDMA) is attractive due to its potential for enhanced information security, simplified network control, improved spectral efficiency and increased flexility in the granularity of bandwidth that can be provisioned. 



* Greater number of users can be accommodated in the system

*Similar to prime codes: employment in a system running prime codes is non-destructive

* Compatible with low-weight prime codes

* Doubles the number of customers that can be carried

* Half the BER



* Time-spreading synchronous code-division multiple-access (CDMA) techniques in electronics and optical communications.

Contact:  Amy Phillips;

Refer to case number UA10-086