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Frequency agile intelligent interference machine

A frequency agile and jammer technology, applied in the field of frequency agility intelligent jammers, can solve the problems of complex jamming system equipment, large total jamming power, unfavorable environment and human health, etc., to reduce hardware complexity, ensure reliability, and protect The effect of environmental protection and human health

Active Publication Date: 2017-11-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a frequency-agile intelligent jammer, which can adaptively transmit jamming signals of various communication systems by analyzing the characteristics of the frequency spectrum, signal strength, and modulation mode of the surrounding electromagnetic environment signals, and It is transmitted out in a way to interfere with the environmental signal, so as to solve the problems of complex equipment of the interference system in the prior art, excessive total power of interference, which is not conducive to the environment and human health.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] see figure 1 , the frequency-agile intelligent jammer in this example includes a transmitting unit 2, a receiving unit 1 and a jamming unit 3.

[0032] In this example, the transmitting unit 2 includes a DAC, a band-pass filter, an up-converter, a band-pass filter, and an RF power amplifier. The RF power amplifier uses a wide-band RF power amplifier, which can meet the requirements of amplifying various standard interference signals and multi-channel mixed interference. In terms of signal requirements, the transmitting unit 2 in this example can work in a broadband state and meet the bandwidth requirements of n-channel interference signals.

[0033] The antenna in this example also adopts a broadband antenna correspondingly, which can meet the requirements of broadband transmission and reception.

[0034] The receiving unit 1 in this example includes a low noise amplifier, a down converter, a low pass filter and an ADC. The receiving unit 1 in this example can receive...

Embodiment 2

[0042] The interference unit in this example is composed of the ZC706 system-on-chip of the Xilinx Company FPGA (Field Programmable Gate Array) platform, and the ADRV9371 of ADI Company is used to form the receiving unit and the transmitting unit, such as image 3 shown. In this example, both the receiving unit and the receiving unit of the transmitting unit are of digital structure. The receiving unit converts the detected environmental signal into a digital signal and then transmits it to the interference unit for feature recognition. It is first converted into an analog signal and then transmitted.

[0043] In this example, ZC706 and ADRV9371 are connected by FMC (FPGA Mezzanine Card) interface, and the transmitting unit is connected to the broadband RF power amplifier through the RF cable. The adjustable, broadband radio frequency power amplifier is connected with the duplexer through the radio frequency cable, and the duplexer is connected with the broadband antenna. Wh...

Embodiment 3

[0045] see Figure 4 , In this example, the 3-way interference signal generation circuit simultaneously generates 15MHz TD-SCDMA, CDMA2000 and WCDMA interference signals. Taking the center frequency of the TD-SCDMA signal as a reference, the frequency of the direct digital frequency synthesizer DDS of CDMA2000 and WCDMA is respectively set to 100MHz and 120MHz, multiplexed output after filtering and gain adjustment. The total bandwidth of the three composite signals is 135MHz. If the carrier frequency of ADRV9371 is set to 2077.5MHz, the carrier frequencies of the output interference signals TD-SCDMA, CDMA2000 and WCDMA are 2010-2025MHz, 2110-2125MHz and 2130-2145MHz respectively. The maximum output bandwidth of the ADRV9371 is 250MHz. In this example, only one radio frequency channel and one transmitting antenna are used to simultaneously interfere with three different base station signals distributed in different carrier frequency bands to realize the miniaturization of the...

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Abstract

The invention relates to the technical field of communication shielding. The invention discloses a frequency agile intelligent interference machine comprising a transmission unit, a receiving unit and an interference unit, wherein the transmission unit meets n-path interference signal bandwidth requirements when working in a broadband state; the interference unit comprises a signal detection unit, an n-path interference signal generation circuit, a multiplexer and a frequency agile unit; the signal detection unit generates circuit connections with the n-path interference signals, the n-path interference signal generation circuit is connected with the multiplexer, and the multiplexer transmits n-path interference signals to the transmission unit, the signal detection unit outputs n-path signals matched with environment signal features through detecting an environment signal, and respectively controls the n-path interference signal generation circuit to output corresponding interference signals; and the frequency agile unit is connected with the transmission unit and the receiving unit, used for switching carrier frequency of the transmission unit and the receiving unit, and n is not less than 2. The frequency agile intelligent interference machine is beneficial to protecting environment and human health, and ensures reliability of interference.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to the technical field of communication shielding (jamming), in particular to a frequency-agile intelligent jamming machine. Background technique [0002] While the development of communication technology brings convenience to people's life, it also brings challenges to information security management and control. Usually, people need mobile phone communication to facilitate life and communication, but at some specific time and place, it is necessary to restrict mobile phone communication to achieve information confidentiality or limit illegal information exchange. Unauthorized mobile phone access needs to be restricted in confidential meeting places; in the examination room environment, in order to ensure the fairness of the test, radio signals need to be shielded to prevent cheating using mobile phones; in the field of anti-terrorism, mobile phone communication needs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04K3/00
CPCH04K3/45H04K3/62
Inventor 夏文龙郭庆功马雪莲杨勇王文实
Owner SICHUAN UNIV
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