ITTC Project


Continuous-band OFDM System for High Speed Optical Transmission

Project Award Date: 04-01-2010



Description

Orthogonal frequency-domain multiplexing (OFDM) has been applied to optical transmission systems to increase the optical bandwidth efficiency and improve the tolerance to performance degradation effects such as chromatic dispersion and polarization mode dispersion. OFDM transmitters and receivers rely on high speed digital signal processing and A/D-D/A conversion. While OFDM systems operating at 20Gb/s have been demonstrated, further data increases will depend on advances in high-speed D/A conversion electronics. Nortel's electronic pre-compensation or post-compensation products for optical transmission systems use sophisticated CMOS technology and built-in high speed A/D-D/A converters.

It would be useful if this capability could be extended to implement OFDM systems. ITTC researchers will investigate a novel coherent band-combining technique to enhance the capability of OFDM systems. The concept is based on the use of a mutually coherent optical frequency comb, and each component of this frequency comb carries a group of OFDM channels. If orthogonally between adjacent groups can be maintained, a continuous optical bandwidth can be used to carry optical channels without the need of a guard-band between them. This will allow a much higher transmission data rate than the current DIA converter speed can provide. It will also make the transmission data rate flexible without sacrificing the bandwidth efficiency.


Investigators

Faculty Investigator(s): Rongqing Hui (PI)

Student Investigator(s): Adam Crifasi, Yuanyuan Zhang, Mahmood Abdul Hameed


Project Sponsors


Primary Sponsor(s): CIENA Corporation


Partner with ITTC

The Information and Telecommunication Technology Center at the University of Kansas has developed several assistance policies that enhance interactions between the Center and local, Kansas, or national companies. 

ITTC assistance includes initial free consulting (normally one to five hours). If additional support is needed, ITTC will offer one of the following approaches: 

Sponsored Research Agreement

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Licensing and Royalty/Equity Agreement

An ITTC goal is the development of investment-grade technologies for transfer to, and marketing by, local, Kansas, and national businesses. To enhance this process, the Center has developed flexible policies that allow for licensing, royalty, and equity arrangements to meet both the needs of ITTC and the company.

Commercialization Development

Companies with a technology need that can be satisfied with ITTC's resources can look to us for assistance. We can develop a relationship with interested partners that will provide for the development of a technology suited for commercialization.

ITTC Resource Access

ITTC resources, including computers and software systems, may be made available to Kansas companies in accordance with the Center's mission and applicable Regents and University policies.

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