A Differential Polarization-time Coding Scheme for Polarization-division-multiplexed Fiber-optic Communication Systems
Advisor:
Kschischang, Frank R.
Department:
Electrical and Computer Engineering
Keywords:
optical; communications; fiber; polarization mode dispersion; MIMO; unitary group; differential; coding
Issue Date:
13-Jan-2011
Abstract (summary):
Polarization division multiplexing (PolDM) is a promising way to improve the spectral efficiency of fiber-optic communication systems. However, PolDM systems suffer greatly from polarization mode dispersion (PMD), especially in long-haul systems. PMD is time-varying and is intrinsically hard to compensate. Current PMD compensators are complicated and expensive to build, adding to the cost and complexity of practical PolDM systems. We propose a new differential polarization time coding scheme combined with controlled polarization rotation to increase the system tolerance to PMD. An encoding algorithm, a differential receiver design, and a decoding algorithm are described in detail. Controlled polarization rotation is achievable using conventional Mach-Zehnder interferometers that are used to modulate the signal. Simulation results show that significant improvement in PMD tolerance can be achieved with little added complexity. Given a certain transmission distance, our proposed system can also increase the achievable data rate compared to a PolDM differential quadrature phase shift keying system.
Permanent Link:
https://hdl.handle.net/1807/25890
Content Type:
Thesis
This item is licensed under a Creative Commons License
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