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Carrier phase recovery method and device

A carrier phase recovery and phase recovery technology, applied in the field of communication, can solve the problem of high complexity of the phase recovery method, and achieve the effect of reducing the complexity and solving the high complexity

Active Publication Date: 2017-10-31
ZTE CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] Embodiments of the present invention provide a carrier phase recovery method and device to at least solve the problem of high complexity of the phase recovery method in the related art

Method used

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  • Carrier phase recovery method and device

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Experimental program
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Embodiment 1

[0043] The method embodiment provided in Embodiment 1 of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, figure 1 It is a block diagram of the hardware structure of a mobile terminal of a carrier phase recovery method according to an embodiment of the present invention, as figure 1 As shown, the mobile terminal 10 may include one or more (only one is shown in the figure) processor 102 (the processor 102 may include but not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA, etc.), for A memory 104 for storing data, and a transmission device 106 for communication functions. Those of ordinary skill in the art can understand that, figure 1 The shown structure is only for illustration, and it does not limit the structure of the above-mentioned electronic device. For example, the mobile terminal 10 may also include a ra...

Embodiment 2

[0062] In this embodiment, a carrier phase recovery device is also provided, which is used to implement the above embodiments and preferred implementation modes, and what has been explained will not be repeated here. As used below, the term "module" may be a combination of software and / or hardware that realizes a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

[0063] image 3 is a structural frame of a carrier phase recovery device according to an embodiment of the present invention Figure 1 ,Such as image 3 As shown, the device includes:

[0064] The first obtaining module 32 is used for, for each grouping, obtaining the grouping according to the angle A 0 The Euclidean distance F(A 0 ), and the grouping in accordance with angle B 0 The Euclidean distance F(B 0 ), wherein the grouping ...

Embodiment 3

[0119] The embodiment of the invention also provides a storage medium. Optionally, in this embodiment, the above-mentioned storage medium may be configured to store program codes for performing the following steps:

[0120] S1, grouping the data that needs to be phase restored;

[0121] S2, for each group, get the group in accordance with angle A 0 The Euclidean distance F(A 0 ), and the grouping in accordance with angle B 0 The Euclidean distance F(B 0 ), where the angle A 0 and angle B 0 The maximum deviation angle value and the minimum deviation angle value set respectively for this group;

[0122] S3, get the F(A 0 ) and F(B 0 ), and use the angle corresponding to the smaller value as the first deflection angle;

[0123] S4. Acquire the first deflection angle and a maximum likelihood phase rotation angle of the data in the group, and use the maximum likelihood phase rotation angle to perform phase recovery on the data in the group.

[0124] Optionally, the storag...

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Abstract

The invention provides a carrier phase recovery method and device. The method comprises the steps of grouping data needing to carry out phase recovery; for each group, obtaining the Euclidean distance F(A<0 >) corresponding to an angle A<0 > and the Euclidean distance F(B<0 >) corresponding to the angle B<0 >, wherein the angle A<0 > and the angle B<0 > are set maximum deviation angle value and minimum deviation angle value of the group; obtaining a relatively small value in the F(A<0 >) and the F(B<0 >), taking the angle corresponding to the relatively small value and a mid-value of an original deviation angle as new boundary values, and repeating the operation to calculate a final deflection angle, wherein the repetition times is search depth; and obtaining the deflection angle and the maximum likelihood phase rotation angle of the data in the group and carrying out phase recovery on the data in the group through utilization of the maximum likelihood phase rotation angle. The problem that in related technologies, the phase recovery method is high in complexity is solved and the phase recovery complexity is reduced.

Description

technical field [0001] The present invention relates to the communication field, in particular to a carrier phase recovery method and device. Background technique [0002] The high-order modulation format technology in optical communication can effectively improve the spectral efficiency, meet the increasing signal transmission rate requirements, and can be flexibly applied to various communication systems. It has become a key technology in long-distance and large-capacity optical communication systems. For optical transmission systems, the phase rotation affects the receiving and demodulation of the signal, and the line width of the laser and the nonlinear effect of the optical fiber will also have a certain impact on the phase of the optical signal, especially for high-order modulation format signals that are more sensitive to phase effects. . Therefore, the carrier phase recovery algorithm is an integral part of the optical signal processing (Digital Signal Processing, D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00H04L7/00
CPCH04L7/0075H04L27/0014H04L2027/0026H04L27/00
Inventor 费爱梅廖屏张帆吕鑫
Owner ZTE CORP
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