Method, apparatus, and system for determining performance of coherent transmitter, device, and medium
AssigneeHuawei Technologies Co., Ltd.
InventorsXiang Liu, Qirui Fan
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Abstract
A method for determining performance of a coherent transmitter includes obtaining a plurality of digital signals carried in a dual-polarization optical signal from the coherent transmitter. A noise search is performed based on the plurality of digital signals to obtain first power of additive white Gaussian noise added to the plurality of digital signals at a bit error rate threshold. A second power of additive white Gaussian noise is added to an ideal signal at the bit error rate threshold, where the ideal signal is an undistorted signal of the plurality of digital signals. Performance of the coherent transmitter is determined based on the first power and the second power.
Claims20
A method for determining performance of a coherent transmitter, the method comprising:
- obtaining a plurality of digital signals carried in a dual-polarization optical signal from the coherent transmitter, wherein the plurality of digital signals are dual-polarization in-phase and quadrature signals;
- performing a noise search on the plurality of digital signals to obtain a first power of additive white Gaussian noise added to the plurality of digital signals at a bit error rate threshold;
- obtaining a second power of additive white Gaussian noise added to an ideal signal at the bit error rate threshold, wherein the ideal signal is an undistorted signal of the plurality of digital signals;
- and
- determining the performance of the coherent transmitter based on the first power and the second power.
An apparatus for determining performance of a coherent transmitter, comprising:
- an analog-to-digital converter;
- and
- a digital signal processor;
- wherein:
- the analog-to-digital converter is configured to obtain a plurality of digital signals carried in a dual-polarization optical signal from the coherent transmitter;
- and
- the digital signal processor is configured to:
- perform noise search based on the plurality of digital signals to obtain a first power of additive white Gaussian noise added to the plurality of digital signals at a bit error rate threshold;
- obtain a second power of additive white Gaussian noise added to an ideal signal at the bit error rate threshold, wherein the ideal signal is an undistorted signal of the plurality of digital signals;
- and
- determine the performance of the coherent transmitter based on the first power and the second power.
A system for determining performance of a coherent transmitter, the system comprising:
- a coherent receiving apparatus;
- and
- a first apparatus, wherein the first apparatus comprises an analog-to-digital converter and a digital signal processor, wherein:
- the analog-to-digital converter is configured to obtain a plurality of digital signals carried in a dual-polarization optical signal from the coherent transmitter;
- and
- the digital signal processor is configured to:
- perform a noise search based on the plurality of digital signals, to obtain a first power of additive white Gaussian noise added to the plurality of digital signals at a bit error rate threshold;
- obtain a second power of additive white Gaussian noise added to an ideal signal at the bit error rate threshold, wherein the ideal signal is an undistorted signal of the plurality of digital signals;
- and
- determine the performance of the coherent transmitter based on the first power and the second power;
- and
- the coherent receiving apparatus is configured to:
- coherently receive the dual-polarization optical signal from the coherent transmitter to obtain a plurality of analog signals;
- and
- output the plurality of analog signals to the first apparatus, wherein the plurality of analog signals are converted into the plurality of digital signals through the analog-to-digital converter.
Dependencies are inferred from the claim text.