KEYWORDS: Fiber optics, Digital signal processing, Polarization, Computing systems, Fiber optic communications, Systems modeling, Dispersion, Error analysis, Monte Carlo methods, Computer simulations
We present a novel LMS equalizer (FDE) for compensating polarization-mode dispersion (PMD) in polarization-multiplexed coherent fiber-optic systems based on the least mean squares (LMS) method with unstructured channel estimation (USE). It is a low-complexity algorithm compared to the traditional time-domain decision-directed LMS (DD-LMS) algorithm. Also, it converges faster and shows better bit error rate (BER) performance as compared to the frequency-domain block training-directed LMS (BTD-LMS) method.
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