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CHROMATIC DISPERSION ESTIMATING CIRCUIT, OPTICAL RECEPTION DEVICE AND CHROMATIC DISPERSION AMOUNT ESTIMATING METHOD

机译:色散估计电路,光接收装置和色散量估计方法

摘要

A Fourier-transformer performs Fourier transform on a filter coefficient output from an adaptive equalizer which comprises a finite impulse response filter of N taps (N represents an integer of 2 or more) in a time direction. An eigenvalue sum calculator integrates a frequency-differentiation result of the Fourier-transformed filter coefficient and a complex conjugate of the Fourier-transformed filter coefficient to calculate a matrix, and calculates a sum of two eigenvalues of the matrix. A proportionality factor calculator calculates a proportionality factor for frequency from the sum of the two eigenvalues.
机译:傅立叶变换器对从自适应均衡器输出的滤波器系数执行傅立叶变换,该自适应均衡器包括在时间方向上具有N个抽头的有限脉冲响应滤波器(N表示2或更大的整数)。特征值和计算器将傅立叶变换后的滤波器系数的频率微分结果与傅立叶变换后的滤波器系数的复共轭进行积分,以计算矩阵,并计算矩阵的两个特征值之和。比例因子计算器根据两个特征值的总和计算频率的比例因子。

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