Unlock instant, AI-driven research and patent intelligence for your innovation.

Single-tone signal identification method

A single-tone signal and recognition method technology, applied in the field of signal recognition, can solve the problems of false alarms, low-rate modulated signal recognition as a single-tone signal, etc.

Inactive Publication Date: 2013-05-29
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods are carried out in the frequency domain, and their common disadvantage is that it is easy to identify low-rate modulation signals as single-tone signals, resulting in false alarms

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Single-tone signal identification method
  • Single-tone signal identification method
  • Single-tone signal identification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] A single tone signal recognition method, its steps are as follows:

[0044] (1) Convert the received real passband signal into a complex passband signal.

[0045] (2) Convert the complex passband signal into a complex baseband signal by down-conversion, and remove the mean value;

[0046] (3) According to the formula Estimate the covariance matrix, where M is the dimension of the covariance matrix, and the dimension is 4, represents the covariance matrix, H represents the conjugate transpose, obviously Dimension bits M .

[0047] (4) After obtaining the covariance matrix, solve its eigenvalues, and get

[0048]

[0049] in Represents the eigenvalue operation, is the eigenvalue vector, is a non-negative real number and sorts the eigenvalues ​​in descending order;

[0050] (5) According to the formula Calculate the recognition judgment amount;

[0051](6) According to the guidelines make identification decisions, where To identify the judgment v...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a single-tone signal identification method, which is characterized by comprising the following steps of: converting a received actual pass band signal into a multiplexing pass band signal, and converting the multiplexing pass band signal into a multiplexing base band signal; judging whether the actual pass band signal is a single-tone signal through detection, wherein the detection is to acquire characteristic values of a related matrix by estimating an autocorrelation matrix of the multiplexing base band signal and sort the characteristic values according to a descending order; calculating a judgment amount through the characteristic values and comparing with a judged threshold value, if the judgment amount is smaller than the threshold value, determining that thesignal is the single-tone signal, otherwise, the signal is a modulation signal. By converting the pass band signal into the base band signal and identifying the single-tone signal according to time domain characteristics of the base band signal, the probability of identifying a low-speed modulation signal into the single-tone signal is reduced, the false-alarm probability is low, and the method also can be applied in the fields of research, such as frequency spectrum monitoring, communication reconnaissance and the like.

Description

technical field [0001] The invention relates to a signal identification method, in particular to a single-tone signal identification method for distinguishing a single-tone signal from a modulation signal. Background technique [0002] Signal recognition is a widely used signal analysis technology, which is the premise of further signal analysis. When performing signal identification, it is often necessary to distinguish monotone signals from modulated signals. A single tone signal, also called a single frequency signal, is a signal with only one constant frequency, which can be a sine signal or a cosine signal. [0003] At present, there are two main methods for identifying single-tone signals: one is the identification method based on signal bandwidth, which estimates the signal bandwidth and compares it with the set threshold. If it is less than the threshold, it is judged as a single-tone signal; otherwise, it is judged as modulation. The second is the identification m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00H04L25/02
Inventor 王甲峰李兵任亚博权友波岳旸李蕾
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS