Method and device for estimating dispersion based on bit error rate
A bit error rate and dispersion technology, applied in the field of dispersion measurement, can solve the problems of low estimation accuracy, long time-consuming, complicated estimation device, etc., and achieve the effect of simple algorithm implementation and low cost of function implementation
Active Publication Date: 2022-05-24
NAT UNIV OF DEFENSE TECH +1
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[0004] Aiming at the common problems of low estimation algorithm efficiency, long time-consuming, low estimation accuracy and complex estimation devices in the existing dispersion estimation technology, the present invention provides a dispersion estimation method and device based on bit error rate, according to dispersion and bit error Quickly estimate the dispersion value of the link in optical fiber transmission
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[0045] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.
[0046] like figure 1 As shown, the present invention provides a method for estimating dispersion based on bit error rate, which estimates the dispersion value of a link in optical fiber transmission based on the linear relationship between bit error rate and dispersion of a link channel of an optical fiber communication system.
[0047] First initialize the calculation parameters, including the following steps:
[0048] S1) Set the initial dispersion value D 0 , with the initial dispersion value D 0 Perform dispersion compensation on the fiber link and calculate the initial dispersion value D 0 Corresponding bit error rate value Pe 0 , the bit error rate value Pe 0 as the minimum bit error rate value Pe min and the bit error rate reference value Pe base The...
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The invention discloses a method for estimating dispersion based on bit error rate. Starting from the initial dispersion value, the bit error rate value in the optical fiber link is calculated sequentially with different dispersion value scanning steps, and the corresponding fitting between the dispersion value and the bit error rate value is obtained. relationship, and finally use the proposed fast search algorithm to obtain the optimal solution of link dispersion estimation. The present invention also discloses a dispersion estimation device based on bit error rate, which includes an optical fiber signal performance monitoring unit, an adjustable dispersion compensation unit and a calculation unit, which can be dynamically and quickly adjusted according to the dispersion estimation method based on bit error rate of the present invention The compensation dispersion value of the fiber link, the signal sampling of the fiber link, provides powerful computing resources for link dispersion estimation, and finally obtains the accurate value of fiber link dispersion estimation.
Description
technical field [0001] The present invention relates to dispersion measurement in optical fiber communication transmission, in particular to a method and device for dispersion estimation based on bit error rate. Background technique [0002] With the further development of big data, Internet of Things, and cloud computing technologies, people's demand for data transmission continues to increase, and the transmission distance and transmission capacity of optical fiber transmission systems continue to increase. In optical fiber communication systems, dispersion is an important parameter to measure the quality of optical fiber transmission links. When there is a certain dispersion in optical fiber links, the bit error rate of the system will increase. With the further development of the optical fiber communication system towards high speed and large capacity, the chromatic dispersion has more and more influence on the transmission quality of the optical fiber link. Therefore, i...
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IPC IPC(8): H04B10/2525H04B10/61H04B10/69H04B10/079
CPCH04B10/2525H04B10/6161H04B10/695H04B10/07953
Inventor 魏俊宇左震苏绍瑾李申何静郭晓俊孙备蒋薇
Owner NAT UNIV OF DEFENSE TECH