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A Calculation Method of Phase Characteristic of Modulated Signal

A technique for modulating signal and phase characteristics, which is applied in the field of calculation of the phase change position of the modulated signal, which can solve the problems of difficult phase change position long-term characteristic monitoring, difficult high-precision measurement, and large human error, so as to avoid errors, improve performance, Practical effect

Active Publication Date: 2011-12-28
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0003] The main problems of the existing phase change position measurement are: using manual observation, the position of the phase change of the BPSK modulation signal is estimated by the experience of the observer, the human error is large, it is difficult to achieve high-precision measurement, and it is difficult to determine the long-term position of the phase change position. characteristics to monitor

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Embodiment Construction

[0033] Below in conjunction with specific embodiment and accompanying drawing, the present invention will be further described:

[0034] The system structure of the present invention is as figure 2 As shown, the signal acquisition device is an analog / digital (A / D) conversion device, which is used to convert the measured modulated signal into a digital signal, and the signal processing device is a data processing device with strong computing power, which is used to modulate the collected The signal is processed to calculate the phase characteristics of the modulated signal.

[0035] The flowchart of the modulation signal phase characteristic calculation method of the present invention is as figure 1 As shown, the method for calculating the phase characteristics of the modulated signal specifically includes steps:

[0036] Step 101: The signal acquisition device collects the modulated signal near the signal phase change position, and the modulated signal near the signal phase...

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Abstract

The invention discloses a method for calculating a modulation signal phase characteristic, relates to modulation signal phase characteristic analysis and especially relates to a method for calculating a modulation signal phase change position. The method comprises the following steps: 1. collecting a modulation signal which is nearby the modulation signal phase change position; 2. generating a reference carrier signal; 3. using a sliding relevant integral method to calculate a correlation function of the reference carrier signal and the collected modulation signal; 4. calculating the modulation signal phase change position. By using the method of the invention, high precision measurement of the modulation signal phase change position can be performed and a long-term characteristic of the modulation signal phase change position can be monitored. The method is novel, creative, simple and practical.

Description

technical field [0001] The invention relates to phase characteristic analysis of modulated signals, in particular to a calculation method for phase change positions of modulated signals. Background technique [0002] At present, in systems such as satellite navigation, aerospace measurement and control, and long-distance time synchronization, the measurement accuracy of equipment delay is getting higher and higher, and the current measurement method with the highest accuracy is to analyze the beginning of equipment delay (usually 1PPS signal rise A certain position along the edge) and the time delay of the phase change position of the radio frequency modulation signal. The testing instruments mainly include high-speed storage oscilloscopes, vector network analyzers and other instruments. The phase change position of the radio frequency modulation signal is mainly measured manually to determine the phase changing position. The BPSK baseband signal becomes an RF modulated sig...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/20
Inventor 魏海涛李隽李刚甘兴利
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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