Patent ID: 8886056
Filing Date: 2014-11-11
Classification: H04B

Abstract:
1. An apparatus for self-phase modulation noise reduction, wherein the apparatus comprises: a signal receiver to receive a baseband electric signal; a processor to process the received electric signal step by step to reduce the self-phase modulation noise in propagation of an optical signal corresponding to the received electric signal; wherein in each step of the processing, a weighted average of the signal power, at the current instant and at several sampling instants adjacent to the current instant, of an electrically dispersion compensated signal waveform in current step, is used to calculate the self-phase modulation noise at the current instant and obtain an estimate of the inverse number of the self-phase modulation noise, and the estimate of the inverse number of the self-phase modulation noise is used to reduce the self-phase modulation noise in the current step by applying the mathematical operation that is equivalent to converting the estimate of the inverse number of the self-phase modulation noise into a complex form and then multiplying the complex form to the electrically dispersion compensated signal waveform in the current step; a signal transmitter to transmit the signal being processed by the processor.