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Multiuser detection for square-law receiver under Gaussian channel noise with applications to fiber-optic communications

机译:高斯信道噪声下平方律接收机的多用户检测及其在光纤通信中的应用

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摘要

In fiber-optic wavelength-division multiplexing (WDM) communications systems, the nonlinearity of the channel and the limitations of optical filters result in received channel signals that are correlated. Furthermore, the square-law nature of the detector converts the additive fiber amplifier noise to a data-dependent asymmetric and non-Gaussian noise. The optimal multiuser detector for a Gaussian approximation is compared to the actual statistics and found to give a close performance estimate. Through bounds on the error probability and the asymptotic multiuser efficiency, the optimal multiuser detector based on a Gaussian approximation is found to improve significantly performance in highly correlated data cases. This result is applied to a practical optical WDM system.
机译:在光纤波分复用(WDM)通信系统中,信道的非线性和光学滤波器的局限性导致接收到的信道信号相互关联。此外,检波器的平方律性质将附加光纤放大器的噪声转换为与数据有关的非对称和非高斯噪声。将高斯近似的最佳多用户检测器与实际统计数据进行比较,并得出一个近似的性能估计。通过限制错误概率和渐近多用户效率,发现基于高斯近似的最优多用户检测器可以显着提高高度相关数据情况下的性能。该结果被应用于实际的光学WDM系统。

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