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System for achieving transient signal capture and spectral analysis

A spectrum analysis and transient signal technology, applied in the transmission system, transmission monitoring, electrical components, etc., can solve the problems of inability to accurately locate time and incompetence, and achieve signal processing speed improvement, reliability and stability improvement, and realization of The effect of cost reduction

Active Publication Date: 2014-04-30
TRANSCOM INSTR
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AI Technical Summary

Problems solved by technology

[0008] 1. Limited by the local oscillator scanning method, analysis methods such as oscilloscopes and spectrum analyzers are completely incapable of analyzing signals that vary with time
[0009] 2. For the measurement results, it is impossible to accurately locate the time when a specific signal appears

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  • System for achieving transient signal capture and spectral analysis
  • System for achieving transient signal capture and spectral analysis
  • System for achieving transient signal capture and spectral analysis

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Embodiment Construction

[0054] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.

[0055] The present invention provides a new measurement method which solves the above problems and can record and analyze these time-varying signals.

[0056] The system structure for realizing transient signal capture and spectrum analysis of the present invention is as follows: figure 2 As shown, it consists of two parts, which are superheterodyne receiver and digital intermediate frequency signal acquisition and analysis module.

[0057] The superheterodyne receiver converts the RF input signal into a fixed-frequency intermediate frequency signal. This conversion structure can be 2-time conversion or 3-time frequency conversion. It is mainly composed of RF input attenuator, pre-prefilter, mixer, local oscillator, anti-alias filter (Anti-alias filter).

[0058] The digital intermediate frequency signal...

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Abstract

The invention relates to a system for achieving transient signal capture and spectral analysis. The system comprises a superheterodyne receiver and a digital intermediate frequency capture and analysis module. The digital intermediate frequency capture and analysis module comprises an analog-digital conversion unit, an IQ modulation unit, a rapid Fourier transform unit and a mapping and recording unit. The mapping and recording unit is used for calculating the signal amplitude of each frequency component output by the rapid Fourier transform unit, conducting probability mapping on the signal amplitudes and recording the appearing frequency of frequency points. According to the system for achieving transient signal capture and spectral analysis, by the adoption of the structure, the information of the frequency, amplitude and occurrence probability and time of signals can be analyzed and recorded at the same time, the method for comprehensively analyzing suddenly-burst signals is provided, the occurrence probability and the specific time of the signals are analyzed from the perspective of the frequency domain, four-dimensional analysis can be carried out on the signals, and the system is widely applied in the actual signal analysis, has good flexibility and expandability and is applicable to large-scale popularization and application.

Description

technical field [0001] The invention relates to the field of radio measurement, in particular to the technical field of frequency domain measurement, in particular to a system for realizing transient signal capture and frequency spectrum analysis. Background technique [0002] With the development of radio technology and communication technology, radio measurement technology has been greatly developed. Radio measurement is mainly divided into two categories: time domain measurement and frequency domain measurement. Time domain measurement is the well-known method of measuring the amplitude of electromagnetic signals with an oscilloscope. Curves as a function of time. The frequency domain measurement is to use the spectrum analyzer to measure the function curve of the amplitude of the electromagnetic signal relative to the frequency. Time-domain measurement and frequency-domain measurement are interrelated, and for signals, they are converted to each other by Fourier series ...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04B17/309
Inventor 陈爽陈向民白皓
Owner TRANSCOM INSTR
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