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A realization method of spectrum analysis real-time waterfall diagram

An implementation method and spectrum analysis technology, applied in the field of real-time waterfall diagram, can solve the problems of large amount of data, omission of important information characteristics of spectrum, and inability to display spectrum information in real time, etc., achieving high degree of integration, convenient use, man-machine Friendly interface effect

Active Publication Date: 2019-02-26
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of data in the waterfall diagram method, the common waterfall diagram analysis will use the extraction non-real-time processing method. The disadvantage is that the spectrum information cannot be displayed in real time, and important information characteristics of the spectrum will be missed.

Method used

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  • A realization method of spectrum analysis real-time waterfall diagram
  • A realization method of spectrum analysis real-time waterfall diagram
  • A realization method of spectrum analysis real-time waterfall diagram

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Experimental program
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Embodiment Construction

[0025] Implementation steps of the present invention: as figure 1 shown

[0026] Step 1: FPGA Control Processing

[0027] The analog-to-digital converter converts the received analog signal into a digital signal and outputs it to the FPGA, and the FPGA performs down-conversion and fast Fourier transformation on the digital signal to form spectrum data;

[0028] Step 2: Spectrum Data Generation

[0029] The spectrum data generation unit reads the spectrum data generated by the FPGA through the DMA mode, and cyclically stores the spectrum data in two data areas in the spectrum data generation unit by means of a ping-pong operation;

[0030] The spectrum data generation unit opens up two data areas A and B in the internal buffer area of ​​the DSP chip, each area is 615 points of data, and each data is 16 bits. The spectrum data is received and stored by means of ping-pong operation. Set the currently received spectrum data to data area A, and store and extract and calculate t...

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Abstract

The invention discloses a method for realizing a real-time waterfall diagram, which relates to a method for realizing a real-time waterfall diagram in the field of frequency spectrum monitoring. It reads the spectrum data through the DMA mode by the spectrum data generation unit, and uses the ping-pong operation mode to store the spectrum data in the data area cyclically. The spectrum data processing unit performs weight calculation on the data at the same position of each frame of spectrum data by means of a weighting factor. The amplitude of the spectral data weighed by the weighting factor is converted into color data according to the user-defined color-amplitude ratio according to time sequence and displayed on the display screen. The present invention has the characteristics of real-time collection, real-time analysis, real-time display, etc., can not lose important information features of frequency spectrum, and effectively avoids the problem of frame loss caused by the difference in processing speed between hardware. It is especially suitable for making a real-time spectrum analyzer for detecting instantaneous signals such as fast jump signals in the field of spectrum monitoring.

Description

technical field [0001] The invention belongs to the field of frequency spectrum monitoring, and in particular relates to a method for realizing a real-time waterfall diagram. Background technique [0002] In spectrum analysis, in order to facilitate users to obtain more information from spectrum data, multiple traces are generally provided, such as maximum hold, minimum hold, 0-SPAN mode, etc. These are all based on two-dimensional relationships of amplitude and frequency, or amplitude and time. Time domain or frequency domain analysis can only analyze a signal with a length of one frame, especially in non-stationary signal analysis, if you need to view the three-dimensional graph of amplitude and frequency changing with time, it is very useful for dynamic signal display, and a new method is needed Show method waterfall diagram. Due to the large amount of data in the waterfall diagram method, the common waterfall diagram analysis uses the extraction non-real-time processin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R23/16
CPCG01R23/16
Inventor 慈国辉李强李靖张红涛
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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