Method and device for converting qpsk signal into pam signal format
A signal format and signal conversion technology, applied in the field of signal processing, can solve the problem of lack of flexible conversion between QPSK signal and various PAM signal formats, and achieve the effect of flexible conversion
Active Publication Date: 2022-08-02
BEIJING UNIV OF POSTS & TELECOMM
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[0004] Embodiments of the present invention provide a method and device for converting QPSK signals into PAM signal formats, so as to solve the problem that current actual optical transmission networks lack flexible conversion between QPSK signals and multiple PAM signal formats
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[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0043] The present invention provides a scheme for converting a QPSK signal to a PAM signal format based on a phase-sensitive amplification process. In the scheme, the signal processing process is divided into two parts, including signal constellation rotation and PSA-based vector transfer process. The overall concept of the program is figure 1 As shown, after the QPSK signal applicable in the long-distance transm...
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The invention provides a method and a device for converting a QPSK signal into a PAM signal format, belonging to the technical field of signal processing. The method includes: acquiring a quadrature phase shift keying QPSK signal; adding a phase shift to the four constellation points of the QPSK signal, so that the four constellation points are rotated by a preset angle to realize the constellation rotation, and then the constellation rotated QPSK is obtained. The signal is used as the first signal; the four constellation points of the first signal are vector shifted based on the non-degenerate phase sensitive amplification PSA, and the real vector values of the four constellation points are obtained as positive or negative, or the imaginary vector values are Positive or negative, and the pulse amplitude modulation PAM signal format corresponding to the preset angle. The embodiment of the present invention realizes flexible conversion between QPSK signal and multiple PAM signal formats.
Description
technical field [0001] The present invention relates to the technical field of signal processing, and in particular, to a method and device for converting a QPSK signal into a PAM signal format. Background technique [0002] In recent years, optical communication network has gradually become an important pillar of the modern communication industry, widely used from Ethernet to telecom backbone network and other communication fields, and has become an important infrastructure for high-speed data transmission. Different types of optical transmission networks are suitable for different types of modulation format signals. According to the classification of transmission distance, they can be mainly divided into short-distance transmission networks and medium and long-distance transmission networks. [0003] All-optical Signal Processing (ASP) technology avoids the use of photoelectric conversion, and directly processes the optical signal in the network in the optical domain, whic...
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IPC IPC(8): H04L27/34
CPCH04L27/34H04L27/3405H04L27/3444
Inventor 崔嘉斌纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM