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A Design Method of Helical Modulation Constellation Diagram Resisting Phase Noise Interference

A technology of phase noise and design method, which is applied in the direction of phase modulation carrier system, shaping network in transmitter/receiver, baseband system components, etc., can solve the problems of high technical complexity and achieve the effect of improving system performance

Active Publication Date: 2021-06-11
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiency that the existing constellation diagram design technology is too complex, the present invention provides a low-complexity, high-reliability modulation constellation diagram design method for combating phase noise;

Method used

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  • A Design Method of Helical Modulation Constellation Diagram Resisting Phase Noise Interference
  • A Design Method of Helical Modulation Constellation Diagram Resisting Phase Noise Interference
  • A Design Method of Helical Modulation Constellation Diagram Resisting Phase Noise Interference

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Embodiment 1

[0045] A spiral modulation constellation diagram design method against phase noise interference, such as figure 2 As shown, in order to combat phase noise θ interference, the signal constellation set S of the present invention adopts a constellation set with a spiral structure, and the steps are as follows:

[0046] (1) Set the phase parameter value set of the signal constellation point;

[0047] (2) Exhaustively enumerate all alternative combinations of phase parameters;

[0048] (3) Calculate the signal constellation point set according to the phase parameter;

[0049] (4) Select the optimal signal constellation set by using the minimum symbol error probability performance criterion. So as to achieve the purpose of improving the performance of the communication system.

Embodiment 2

[0051] According to a method for designing a spiral modulation constellation diagram against phase noise interference described in Embodiment 1, the difference is that:

[0052] The above-mentioned spiral modulation constellation diagram design method of phase noise interference operates in a communication system with phase noise θ interference; as figure 1 As shown, the transmitting end of the communication system performs constellation diagram design, and the received signal obtained by the receiving end is interfered by phase noise θ and Gaussian white noise w, and the receiving end demodulates the received signal according to the maximum likelihood criterion; the communication system The transmitter sends modulation symbols s, s∈S, S is a signal constellation set including M modulation symbols, due to the interference of phase noise θ, the receiving end of the communication system obtains the received signal r, r=s.e jθ +w, w refers to additive Gaussian white noise, θ refe...

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Abstract

The present invention relates to a spiral modulation constellation diagram design method against phase noise interference. In order to resist phase noise θ interference, the signal constellation set S of the present invention adopts a constellation set with a spiral structure, and the steps are as follows: (1) Setting the signal constellation (2) Exhaustively enumerate all the candidate combinations of phase parameters; (3) Calculate the signal constellation point set according to the phase parameters; (4) Select the optimal signal constellation set by using the performance criterion of minimizing the probability of symbol error . So as to achieve the purpose of improving the performance of the communication system. The present invention models the signal constellation set based on a simpler and more practical spiral, limits the selection of signal phase parameters to discrete numerical optimization within a finite set, and obtains the phase parameter with the best performance by minimizing the error symbol probability performance criterion Combination, so as to calculate the signal constellation set that can minimize the symbol error probability, so as to achieve the purpose of improving system performance.

Description

technical field [0001] The invention relates to a method for designing a signal modulation constellation diagram, in particular to a design method for a spiral modulation constellation diagram resistant to phase noise interference, and belongs to the technical field of wireless communication. Background technique [0002] In a wireless communication system, the instability of the local oscillator will cause random jitter of the signal phase, that is, phase noise, which will cause the signal phase to rotate, thereby seriously reducing the reliability of communication transmission. Therefore, improving the performance of the communication system requires suppressing phase noise interference. [0003] According to existing research work (see literature [1] for details, literature [1]: R.Krishnan, M.R.Khanzadi, T.Eriksson and T.Svensson. "Soft Metrics and Their Performance Analysis for Optimal Data Detection in the Presence of Strong Oscillator Phase Noise , "IEEE Transactions ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/20H04L27/34H04L25/03H04L25/02
Inventor 郭帅帅赵鹏杰张海霞张彭袁东风
Owner SHANDONG UNIV