Active device and method for interfering multi-frequency-band power line communication

A technology of power line communication and interference equipment, which is applied in the direction of communication interference, distribution line transmission system, electrical components, etc., and can solve problems such as power line communication eavesdropping

Inactive Publication Date: 2014-07-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to propose an active multi-band power line communication interference devi

Method used

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  • Active device and method for interfering multi-frequency-band power line communication
  • Active device and method for interfering multi-frequency-band power line communication
  • Active device and method for interfering multi-frequency-band power line communication

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] This embodiment is an embodiment of "an active multi-band power line communication interference device", which uses an active fixed single-band power line communication interference device. Figure 1a with 1b with figure 2 is a schematic diagram of this embodiment. Figure 1b It is an active multi-band power line communication interference device, of which 1.2 is a coupling circuit, 1.4 is an impedance matching network, and 1.5 is a power adaptive interference source module. In this embodiment, it can be known that the frequency band to be interfered with is fixed, Figure 1b The device can be reduced to Figure 1a The device shown, where 1.1 is a power module and a driver module. 1.2 is a coupling circuit, 1.3 is a power adaptive interference source module, and 1.4 is an impedance matcher. figure 2 It is a system block diagram, in which 2.21 and 2.22 are the sending and receiving equipment of the narrowband power line communication system respectively; 2.1 is the ...

Embodiment 2

[0070] This embodiment is an embodiment of "an active multi-band power line communication interference device", which adopts an active multi-band power line communication interference device. Figure 1b with figure 2 is a schematic diagram of this embodiment. The application scenario of this embodiment is a power line local area network. In practical applications, the specific frequency band used by the power line communication device is often unknown. At this time, it is necessary to adaptively change the frequency band. Therefore, the active power line communication interference device in Embodiment 2 is used. The interference frequency band of communication interference equipment is variable. Such as figure 2 As shown in , in this embodiment, 2.21 is connected to the power line local area network, which is a narrowband power line communication transmitting device, and 2.22 in the figure is a certain narrowband power line communication receiving device.

[0071] In this...

Embodiment 3

[0083] The system block diagram of this embodiment is as follows image 3 and Figure 4 shown. image 3 The device shown is based on Figure 1b The shown equipment only adds multiple sets of resistive matchers, noise signal sources and modulators, which are independently controlled by the embedded intelligent CPU module.

[0084] Depend on Figure 4 It can be seen that multiple narrowband power line communication transmitting devices (labeled 1 to k=3) are connected to the power line LAN in this embodiment. Assume first that it modulates the baseband signal onto the frequency band, and set the center frequency of the occupied frequency band as f ignal 1 , f signal 2 , f signal 3 f signal 1 = 30 KHz , f ...

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Abstract

The invention relates to an active device and method for interfering multi-frequency-band power line communication, and belongs to the related technical fields of power line transmission, power line communication, power line interference, information safety, a power network, communication and the like. The active device and method are mainly used for interfering multi-frequency-band power line communication. The active device comprises a power module, a coupling circuit, a power self-adaptation interfering source module, an impedance matching device and a driving module. According to the active device and method, narrow-band power line communication devices in various frequency bands can be interfered, and the frequency band ranges of the frequency bands can be inquired in the international standard for narrow-band power line communication; power line communication is interred through power self-adaptation active noise signals, the power self-adaptation power line communication devices can be interfered, the interfering capacity is improved, and energy is saved.

Description

technical field [0001] The invention relates to an active multi-band power line communication interference device and method, which belongs to the related technical fields of power line transmission, power line communication, power line interference, information security, power network and communication, and is mainly used for blocking multi-band power line communication . Background technique [0002] Due to the development of technology, the application threshold of wired LAN based on narrowband power line communication is very low, and it has become popular. Narrowband power line transmission equipment can be made very small, and can transmit when the power is turned on. Therefore, applications such as power line meter reading and power line transmission calls provide convenience for people's lives. For example, the X-10 protocol originated in the United States and related equipment can remotely control electronic equipment through power lines; in recent years, Ruilang ...

Claims

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Application Information

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IPC IPC(8): H04K3/00H04B3/54
Inventor 卢继华叶能于含笑唐堂
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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