Method for self-calibration of an electrical and/or optical channel
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United States of America Patent
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Jan 9, 2018
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app pub date -
Oct 12, 2016
filing date -
Oct 12, 2016
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Abstract
An auto-equalization network device for optical transmitting and receiving is provided. The device includes a network device having an optical transmitter and an optical receiver. The network device is configured to determine a frequency domain forward transmission loss characterization for a signal transmitted by the optical transmitter, looped back and received by the optical receiver. The device is configured to generate a model in the frequency domain having control points based on the characterization, generate and load finite impulse response (FIR) filter taps into a finite impulse response filter based on the model in the frequency domain. The device is configured to iterate transmission of a signal with frequency-dependent preemphasis by the finite impulse response filter, characterization for the frequency-dependent preemphasized signal as looped back and received by the optical receiver, comparison to previous characterization, adjustment of the control points, and reloading the finite impulse response filter taps, until the comparison meets an optimum, so that the network device is auto-equalized for optical transmitting.
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