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Phase modulation code rate estimation method based on peak position

A technology of phase modulation and peak position, which is applied in the field of code rate, can solve the problems of non-cooperative signal environment performance degradation, high hardware cost, complex operation, etc., and achieve the effect of improved accuracy, good robustness, and simple principle

Active Publication Date: 2017-03-15
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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AI Technical Summary

Problems solved by technology

[0007] 1. Complicated calculation, large amount of calculation and high hardware cost
[0008] 2. The implementation of some methods requires certain prior information, and the performance decreases in a non-cooperative signal environment

Method used

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  • Phase modulation code rate estimation method based on peak position
  • Phase modulation code rate estimation method based on peak position
  • Phase modulation code rate estimation method based on peak position

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Embodiment Construction

[0024] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0025] Such as figure 1 As shown, a phase modulation code rate estimation method based on the peak position is specifically performed in the following order:

[0026] Step 1: Calculate the peak point of the received phase modulation signal through the method of combining window sliding and mutation point correction, and obtain the signal peak point sequence;

[0027] Step 2: Perform linear fitting on the signal peak point sequence by a straight line fitting method to obtain the fitting slope and fitting cutoff, and obtain the fitting sample data.

[0028] Step 3: Make a difference between the above signal peak point sequence and the fitted sample data to obtain a fitted difference sequence;

[0029] Step 4: Analyze the fitted difference sequence. When the phase of the fitted difference sequence changes suddenly, the diffe...

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Abstract

The present invention discloses a phase modulation code rate estimation method based on peak position, and relates to the code rate technology field. The method concretely comprises the following steps: solving the points where the received phase modulation signal peaks are located, and obtaining a signal peak point sequence; performing linear fitting of the signal peak sequence to obtain a fitting sequence; performing subtraction of the signal peak sequence and the fitting sequence, and obtaining a fitting difference sequence; according to the analysis of the fitting difference sequence, when the phase has abrupt changing, changing the difference sequence value of the corresponding fitting difference sequence, obtaining the distance between the adjacent points of abrupt changing, obtaining the distance minimum value to take as a code element period, and performing reciprocal of the code element period to obtain the code element rate.

Description

technical field [0001] The present invention relates to the field of code rate technology, in particular to a phase modulation code rate estimation method based on peak position. Background technique [0002] As a digital modulation signal with phase modulation and constant amplitude, phase modulation (MPSK) has the advantages of strong anti-interference ability and can expand the signal bandwidth. Therefore, it is often used as a signal type commonly used for low probability of intercept signals, and is widely used in pulse compression radars. The symbol rate is one of the core parameters to describe the intrapulse characteristics of the radar signal. Accurately obtaining the symbol rate of the intercepted signal is of great significance for the identification of modulation methods and the search for specific signals. [0003] The parameter estimation of MPSK mainly has the following methods: the method of estimating the symbol rate of MPSK signals based on the cyclic spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02
CPCH04L25/0262
Inventor 赵新明郝绍杰何鹏韩俊辉
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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