Medium-short-wave radio broadcast signal detection method

A technology for radio broadcasting and signal detection, which is used in line transmission monitoring/testing, line transmission components, distribution line transmission systems, etc. and other problems, to achieve the effect of short detection time, easy implementation and simple method

Inactive Publication Date: 2014-12-10
STATE GRID CORP OF CHINA +2
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AI Technical Summary

Problems solved by technology

[0008] (1) There is no research on the detection of medium-wave radio broadcast signals on power lines, especially on the power lines of medium and low voltage distribution networks;
[0009] (2) The existing radio broadcast signal detection methods do not meet the detection time and algorithm complexity requirements of the distribution network power line carrier communication

Method used

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  • Medium-short-wave radio broadcast signal detection method
  • Medium-short-wave radio broadcast signal detection method
  • Medium-short-wave radio broadcast signal detection method

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Embodiment 1

[0043] Such as Figure 1-Figure 7 As shown, the invention of this example is a medium and short wave radio broadcast signal detection method, which is suitable for the power line carrier communication system in the medium and low voltage distribution network environment, and the power line carrier communication PLC equipment connected to the power grid in a differential mode coupling mode. Detection of medium and short wave radio broadcast signals on power lines. The proposed detection method for medium and short wave radio broadcasting signals mainly includes the following four steps:

[0044] (1) Power line channel noise collection;

[0045] (2) Determine the frequency domain of the acquisition noise;

[0046](3) Calculation of the average value of noise intensity;

[0047] (4) Detecting medium and short wave radio broadcast signals in the noise.

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Abstract

The invention relates to a medium-short-wave radio broadcast signal detection method which is suitable for a power line carrier communication system in medium-low-voltage power distribution network environment. The power line carrier communication system comprises power line carrier communication equipment and a power line channel. The method includes that the power line carrier communication equipment collects noise of the power line channel by means of differential-mode coupling, time-frequency domain analysis is performed through short-time Fourier transformation, an average value of noise strength of each frequency point within sampling time is calculated, and whether medium-short-wave radio broadcast signals enter or not is detected finally on the basis of a judgment threshold. The medium-short-wave radio broadcast signal detection method is suitable for medium-short-wave radio broadcast signal detection of power line carrier communication systems of medium-low-voltage power distribution networks within a frequency range of 500kHz-30MHz.

Description

technical field [0001] The present invention relates to a method for detecting medium and short wave radio broadcasting signals, and more particularly relates to a method for detecting medium and short wave radio broadcasting signals used in a power line carrier communication system. Background technique [0002] Power line communication technology is a communication method that uses power cables as a communication medium to transmit data information. A conventional power line communication technology is to load a modulated high-frequency carrier signal on an existing power line for communication. Therefore, power line communication is usually called power line carrier communication (PowerLine Communication, PLC). According to the voltage level of carrier communication lines, PLC technology generally includes: high-voltage power line carrier communication using high-voltage transmission lines with a voltage level of 35kV and above as the communication medium, and medium-volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/54H04B3/46
Inventor 陆阳刘伟麟李建岐杨冰高鸿坚陶锋赵涛褚广斌安春燕赵勇马平
Owner STATE GRID CORP OF CHINA
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