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Clock recovery method and device

A technology of clock recovery and clock sampling, which is applied in the field of communication and can solve problems such as sampling clock asynchrony

Active Publication Date: 2015-04-29
NANJING ZHONGXING XIN SOFTWARE CO LTD
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  • Abstract
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Problems solved by technology

[0004] The invention provides a clock recovery method and device, which solves the problem that the sampling clocks of the transmitter and the receiver are not synchronized

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Embodiment Construction

[0071] In order to solve the problem that the sampling clocks of the transmitter and the receiver are not synchronized, the embodiments of the present invention provide a clock recovery method and device. Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0072] First, Embodiment 1 of the present invention will be described with reference to the accompanying drawings.

[0073] A clock recovery device provided by an embodiment of the present invention has a structure such as figure 1 As shown, it includes an analog-to-digital converter (ADC) module, a front-end digital signal processing module, a Fourier transform module (FT), a first sampling phase adjustment module, a polarization demultiplexing and equalization module, a clock error...

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Abstract

A clock recovery method and device. The present invention relates to the field of communications, and solves the problem of the sampling clock of a transmitter and of a receiver not being synchronized. The method comprises: calculating, in accordance with polarization multiplexed and post-equalized data, a clock sampling error, a signal phase error compensation value and a residual phase error compensation value; adjusting the sampling clock in accordance with the clock sampling error; engaging in a first phase adjustment in accordance with the signal phase error compensation value; engaging in a second phase adjustment in accordance with the residual phase error compensation value. The technical solution provided in the present invention embodiment is applicable to coherent data receivers and achieves a three-level error compensation mechanism in regard to a clock.

Description

technical field [0001] The present invention relates to the communication field, in particular to a clock recovery method and device. Background technique [0002] In the communication system, the sampling clocks of the transmitter and the receiver are not completely synchronized. In order to correctly obtain the transmitted signal at the receiving end, it is necessary to solve the problem that the clocks of the transmitter and the receiver are not synchronized. Clock recovery is to solve the problem of the transmitter and the receiver. The problem with the sampling clock being out of sync. [0003] Modern communication digital receivers generally use coherent digital receivers, which can compensate for transmission impairments in received signals in the digital domain, such as chromatic dispersion compensation, polarization mode dispersion compensation, clock recovery, frequency offset compensation, and phase compensation Wait. The clock recovery module can correctly extr...

Claims

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Application Information

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IPC IPC(8): H04L7/00
CPCH04L5/04H04B10/6165H04B10/616H04L27/26526H04L7/0037H04B10/6161H04B10/6162H04B10/6164H04B10/6166
Inventor 廖群蔡轶周伟勤
Owner NANJING ZHONGXING XIN SOFTWARE CO LTD
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