Method and apparatus for removing jitter in demapping, method and apparatus for obtaining clock, phase discriminator

Abstract

The invention provides a dithering-removal method and device in de-mapping, a clock obtain method and device, and a phase detector. The dithering-removing method in de-mapping includes: data required de-mapping is processed de-mapping and is cached according with data writer clock; data writer virtual clock and data reader precast clock is obtained according with data required de-mapping and corresponding clock; data writer virtual clock and data reader precast clock are compared, data reader clock is generated according with the comparison result; data after being de-mapping is read according with the data reader clock. The technical solution provided by the invention can obtain dithering condition generated in de-mapping course effectively, filter dithering generated in data de-mapping course effectively by adjusting clock in time, and obtain data output with high performance.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a debounce method and device in demapping, a clock acquisition method and device, and a phase detector. Background technique [0002] In the case of the wide application of Optical Transport Network (OTN, Optical Transport Network), there are multiple low-rate Optical Channel Transport Unit (OTU, Optical Channel Transport unit) signals that are multiplexed and mapped into the high-rate OTU network for transmission. Requirements; and high-rate OTU signal demapping to obtain multiple low-rate OTU signals. A large amount of mapping and combining jitter will inevitably be generated during the data demapping process, and OTN services have high requirements on jitter, so it is necessary to filter out the jitter generated during the demapping process to ensure clock performance. [0003] The prior art provides a debounce method in demapping, please refer to figure 1 , is...

AI Technical Summary

Problems solved by technology

However, since the read and write clocks on both sides of the demapping unit are all clocks with large gaps, the writing and reading of data are all performed in a read / write manner with large gaps. Therefore, during the creation process of the present invention, The inventors have found that there are at least the following problems in the prior art: the difference between the reading and writing pointers according to demapping cannot truly and effectively reflect the difference between reading and writing on both sides of the demapping unit, so an effective readout clock cannot be obtained, thus Effectively remove jitter generated during data demapping

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