An optical or an optoelectronic device and methods are provided for data transmission across two interconnects. First, an electrical signal is obtained from an interconnect. Next, the electrical signal is modulated. Within the modulated electrical signal, an occurrence of a transition is determined, in which a change in a power of the electrical signal by more than a threshold amount. In response to the determination of the occurrence of the transition, coefficients indicative of respective amounts of compensation to resolve or mitigate nonlinearities associated with the transition are determined. According to the coefficients, a filter is applied in a vicinity of the transition to obtain a modified electrical signal. The modified electrical signal is converted into an optical signal and coupled to a fiber to transmit the optical signal to a destination at a second interconnect.

An optical or an optoelectronic device and methods are provided for data transmission across two interconnects. First, an electrical signal is obtained from an interconnect. Next, the electrical signal is modulated. Within the modulated electrical signal, an occurrence of a transition is determined, in which a change in a power of the electrical signal by more than a threshold amount. In response to the determination of the occurrence of the transition, coefficients indicative of respective amounts of compensation to resolve or mitigate nonlinearities associated with the transition are determined. According to the coefficients, a filter is applied in a vicinity of the transition to obtain a modified electrical signal. The modified electrical signal is converted into an optical signal and coupled to a fiber to transmit the optical signal to a destination at a second interconnect.

The disclosure relates to a method, an optical receiver and an optical system for compensating, at an optical receiver, signal distortions induced in an optical carrier signal by a periodic copropagating optical signal, wherein the optical carrier signal and the copropagating signal copropagate at least in part of an optical system or network, by: receiving, at the optical receiver, the optical carrier signal, wherein the optical carrier signal is distorted by the copropagating signal; determining, at the optical receiver, a period of a periodic component of the distorted optical carrier signal; determining, at the optical receiver, a periodic distortion of the distorted optical carrier signal; and generating a compensation signal to correct the distorted optical carrier signal according to the determined periodic distortion.

The disclosure relates to a method, an optical receiver and an optical system for compensating, at an optical receiver, signal distortions induced in an optical carrier signal by a periodic copropagating optical signal, wherein the optical carrier signal and the copropagating signal copropagate at least in part of an optical system or network, by: receiving, at the optical receiver, the optical carrier signal, wherein the optical carrier signal is distorted by the copropagating signal; determining, at the optical receiver, a period of a periodic component of the distorted optical carrier signal; determining, at the optical receiver, a periodic distortion of the distorted optical carrier signal; and generating a compensation signal to correct the distorted optical carrier signal according to the determined periodic distortion.

A radio over fiber (RoF) system and a nonlinear compensation method, where the RoF system includes a BBU and an RRU, the RRU includes an electrical component, and the BBU includes a downlink and a feedback link. A predistortion module and an optical component are disposed on the downlink, an input end of the feedback link is connected to an output end of the optical component, and the feedback link is configured to feed back, to the predistortion module, a nonlinear signal output by the optical component. The RoF system further includes a temperature detection module configured to detect a temperature value of the electrical component, and transmit the temperature value to the predistortion module. The predistortion module is configured to perform digital predistortion DPD on a baseband signal based on the temperature value and the nonlinear signal.

A radio over fiber (RoF) system and a nonlinear compensation method, where the RoF system includes a BBU and an RRU, the RRU includes an electrical component, and the BBU includes a downlink and a feedback link. A predistortion module and an optical component are disposed on the downlink, an input end of the feedback link is connected to an output end of the optical component, and the feedback link is configured to feed back, to the predistortion module, a nonlinear signal output by the optical component. The RoF system further includes a temperature detection module configured to detect a temperature value of the electrical component, and transmit the temperature value to the predistortion module. The predistortion module is configured to perform digital predistortion DPD on a baseband signal based on the temperature value and the nonlinear signal.

Provided are a signal processing method and apparatus, a storage medium, and an electronic apparatus. The method is applied to an optical communication receiving end, and comprises: after receiving an optical analog signal, converting the optical analog signal into a digital signal; and performing nonlinear effect compensation processing on the digital signal.

Provided are a signal processing method and apparatus, a storage medium, and an electronic apparatus. The method is applied to an optical communication receiving end, and comprises: after receiving an optical analog signal, converting the optical analog signal into a digital signal; and performing nonlinear effect compensation processing on the digital signal.

Methods and systems for low complexity interference cancellation in multichannel optical transmission. Local or self-iteration is performed one or more times between an expected propagation decision feedback equalizer and a soft demapper. Following local iteration, a soft decision forward error correction decoder determines bit log-likelihood ratios, which are fed back to the expected propagation decision feedback equalizer and soft demapper for further self-iteration. Global iteration involving the decoder can also be performed one or more times before a bitstream is decoded.

Methods and systems for low complexity interference cancellation in multichannel optical transmission. Local or self-iteration is performed one or more times between an expected propagation decision feedback equalizer and a soft demapper. Following local iteration, a soft decision forward error correction decoder determines bit log-likelihood ratios, which are fed back to the expected propagation decision feedback equalizer and soft demapper for further self-iteration. Global iteration involving the decoder can also be performed one or more times before a bitstream is decoded.