University of Illinois Urbana-Champaign

Incoherent MIMO OFDM over Multimode Optical Fibers

Sridhar, Anjali

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Description

Title
Incoherent MIMO OFDM over Multimode Optical Fibers
Author(s)
Sridhar, Anjali
Contributor(s)
Jones, Douglas L.
Issue Date
2010-05
Keyword(s)
  • orthogonal frequency-division multiplexing
  • multiple-input multiple-output
  • optical modulation
  • power optimization
  • fiber-optic network optimization
Abstract
Fiber optic communication offers a number of advantages over networks built using co-axial cables. The networks built using fiber optics provide higher bandwidth, greater security, lower cross talk. They are not affected by electromagnetic disturbances and are smaller and more flexible. In order to modify the existing network that uses coaxial cables, changes need to be made in the hardware and software at both the sender and receiver ends. Incoherent MIMO (Multiple Input Multiple Output) OFDM (Orthogonal Frequency Division Multiplexing) over multimode optical fibers is possible by extending current algorithms to consider the limitations and advantages provided by optical fibers. An optimal power/rate optimization algorithm for OFDM channels can be extended to be used in optical fibers. Peak to Average Power Ratio (PAPR) reduction methods are extended to non-coherent optical modulation by introducing modifications to deal with new constraints such as the non-negativity of the signal. It was found that the best data rates were obtained with power allocation that was slightly less than or equal to the power budget. With the value of this allocated power as a parameter, peak-to-average-power ratio reduction was simulated. Over the 1000 trials that were run, the average power gain was found to be -9.581 dB. This is a 33.83% reduction in the average optimal power needed.
Type of Resource
text
Language
en
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http://hdl.handle.net/2142/47010

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