A method and device for signal phase recovery
A signal phase and signal technology, applied in the field of communication, can solve the problem of low efficiency of the phase recovery of the signal to be recovered, and achieve the effect of improving the efficiency and narrowing the search range.
Active Publication Date: 2020-04-17
BEIJING UNIV OF POSTS & TELECOMM
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Therefore, the efficiency of phase recovery of the signal to be recovered using the blind phase estimation method in the prior art is too low
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[0061] The technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention.
[0062] The method and device for signal phase recovery provided by the embodiments of the present invention estimate the error caused by the determination of the signal to be recovered after rotation for each signal to be recovered after rotation; Among the errors generated by the judgment, the estimation interval of the phase noise of the signal to be restored that rotates the same phase is obtained; for each estimation interval of the phase noise of the signal to be restored, from the estimation interval of the phase noise, determine the interval for compensating the The error phase of the signal to be recovered; based on the error phase, phase recovery is performed on the signal to be recovered. Compared with the prior art, the embodiment of the present invention can improve the efficiency of phase re...
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The embodiment of the present invention provides a method and device for signal phase recovery. The method comprises: for each to-be-recovered signal after rotation, estimating the error caused by thejudgment of the to-be-recovered signal after rotation; in the error caused by the judgment of the to-be-recovered signal after rotation, obtaining the estimation interval of phase noise of to-be-recovered signals that rotate the same phase; for the estimation interval of phase noise for each to-be-recovered signal, determining the error phase used for the compensation of the to-be-recovered signal from the estimation interval of phase noise; and carrying out phase recovery on the to-be-recovered signal based on the error phase. According to the embodiment of the present invention, within theestimation interval of phase noise of the to-be-recovered signal, the error phase of each to-be-recovered signal is determined, the lookup range to determine the error phase of each to-be-recovered signal is reduced, and the error phase of each to-be-recovered signal can be quickly determined. Therefore, the embodiment of the present invention can improve the efficiency of phase recovery of the to-be-recovered signal.
Description
Technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for signal phase recovery. Background technique [0002] In the signal transmission process, the transmitted signal is called the signal to be recovered. The signal to be recovered is modulated and loaded on the optical carrier, transmitted through the optical fiber link, the signal is amplified, and then the amplified signal is converted into a digital signal. The digital signal needs to undergo chromatic dispersion nonlinear compensation and frequency offset estimation, and then the phase of the signal to be recovered is recovered. [0003] The prior art uses a blind phase estimation method to recover the phase of the signal to be recovered, and the process is as follows: [0004] The signals to be recovered in the same group are equally divided into 32 phases from -45 degrees to 45 degrees, and the degree difference between each phase is 2.8 degrees;...
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IPC IPC(8): H04L27/34
CPCH04L27/34H04L27/3405
Inventor 忻向军田凤张琦王拥军王红恩田清华尹霄丽杨雷静
Owner BEIJING UNIV OF POSTS & TELECOMM