KEYWORDS: Orthogonal frequency division multiplexing, Signal to noise ratio, Modulation, Receivers, Data conversion, Signal detection, Adaptive optics, Computing systems, Single mode fibers, Signal processing
In order to overcome the defects of least squares (LS) estimator used to eliminate phase noise in the direct-detection
(DD) optical orthogonal frequency division multiplexing (OOFDM) transmission system, we present an adaptive Least
Mean Square (LMS) estimator which has the same computational complexity as LS estimator. The performance of the
proposed estimator is evaluated in an experimental system with 2.5Gbits/s DD-OOFDM signal transmission over 100km
standard single mode fiber (SSMF). The experimental results show that the performance of the system with LMS
estimator is much better than that with LS estimator.
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