Signal Modulation Identification Method Based on Peak Position Discrimination

A technology of peak position and signal modulation, applied in modulation carrier systems, digital transmission systems, electrical components, etc., can solve the problems of high hardware cost, large amount of calculation, and reduced recognition accuracy, achieving easy engineering implementation and good robustness. , easy to achieve effect

Inactive Publication Date: 2017-10-13
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The calculation of the short-time Fourier transform involved is complex, the amount of calculation is large, and the fitting error of the signal square also involves a large number of calculations, which requires high system hardware and the real-time effect is not ideal.
[0014] Deficiencies in existing technical solutions: complex calculation, large amount of calculation, high hardware cost
The implementation of some methods requires certain prior information, and the recognition accuracy rate decreases in a non-cooperative communication environment.

Method used

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  • Signal Modulation Identification Method Based on Peak Position Discrimination
  • Signal Modulation Identification Method Based on Peak Position Discrimination
  • Signal Modulation Identification Method Based on Peak Position Discrimination

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] The basic flow of the algorithm is as follows figure 2 shown.

[0044] The basic steps of the algorithm are:

[0045] (1) Find the peak position sequence peak(m) at the point where the peak value of the received signal is located;

[0046] (2) Perform linear fitting on the sequence peak(m) to obtain the fitting sequence linear_peak(m);

[0047] (3) Perform a difference fitting difference sequence peak_dif(m) on the above two sequences;

[0048] (4) Do a linear fit on peak_dif(m) to get the mean square error peak_mse;

[0049] (5) peak_mse and set threshold δ 1 For comparison, satisfy peak_mse1 Then go to step (6), otherwise go to step (7);

[0050] (6) peak_mse and set threshold δ 2 For comparison, satisfy peak_mse2 It is NLFM, if it is not satisfied, it is LFM;

[0051] (7) peak_mse and set threshold δ 3 For comparison, satisfy peak_ms...

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Abstract

The invention discloses a signal modulation mode identification method based on peak position discrimination; it includes the following steps: performing peak calculation on received signals to obtain a peak position sequence; performing linear fitting on the peak position sequence, and calculating the difference between the two Sequence; linear fitting of the difference sequence to obtain discriminant parameters; according to the comparison of the discriminant parameters and the set threshold to classify the received signal, and finally identify various signal modulation types and output the judgment result. The principle of the invention is simple, the amount of calculation is small, and it is easy to realize.

Description

technical field [0001] The invention relates to a method for identifying a signal modulation mode based on peak position discrimination. Background technique [0002] With the rapid development of communication technology, the communication environment is becoming more and more complex, which puts forward higher requirements for signal modulation recognition. Signal modulation method identification is widely used in communications. In civilian communications, signal modulation method identification is used for signal confirmation, interference identification, and spectrum monitoring. In the field of military communications, signal modulation method identification is used for communication, electronic warfare, electronic Reconnaissance direction finding and electronic interference, etc., so the identification technology of signal modulation mode is an indispensable key technology in the field of communication. [0003] The identification methods of signal modulation methods ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00
Inventor 赵新明郝绍杰何鹏韩俊辉
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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