阅读说明：本技术 一种信号干扰系统及便携式信号侦察干扰装置 (Signal interference system and portable signal reconnaissance interference device ) 是由 黄小宇 于 2020-06-15 设计创作，主要内容包括：本发明提供了一种信号干扰系统及便携式信号侦察干扰装置,其中信号处理系统,包括：至少两套射频前端处理单元；至少两套中频基带信号处理单元；以及CPU/ARM控制单元；输入天线接受到的信号依次连接第一射频前端处理单元、第一中频基带信号处理单元后进入CPU/ARM控制单元,所述CPU/ARM控制单元将信号处理之后依次通过第二射频前端处理单元、第二中频基带信号处理单元后发送至输出天线。通过被动探测和主动反制设备,以固定预警探测固定和反制基站式一体化承载平台,构建集预警探测、反制、指挥为一体的全自动侦测反制系统,对小范围内无线通讯设备实施近距离侦察和干扰处置,远距离切断小微无人机GPS定位信号。(The invention provides a signal interference system and a portable signal reconnaissance interference device, wherein the signal processing system comprises: at least two sets of radio frequency front end processing units; at least two sets of intermediate frequency baseband signal processing units; and a CPU/ARM control unit; the signal received by the input antenna is sequentially connected with the first radio frequency front-end processing unit and the first intermediate frequency baseband signal processing unit and then enters the CPU/ARM control unit, and the CPU/ARM control unit processes the signal and then sends the processed signal to the output antenna after sequentially passing through the second radio frequency front-end processing unit and the second intermediate frequency baseband signal processing unit. Through passive detection and initiative countering equipment to fixed early warning is surveyed fixed and is countering basic station formula integration load-bearing platform, constructs the full-automatic countercheck system of listening that collects early warning survey, countering, commander as an organic whole, carries out closely reconnaissance and interference to wireless communication equipment in the small-range and deals with, cuts off little unmanned aerial vehicle GPS positioning signal remotely.)

1. A signal processing system, comprising:

at least two sets of radio frequency front end processing units;

at least two sets of intermediate frequency baseband signal processing units;

and a CPU/ARM control unit;

the signal received by the input antenna is sequentially connected with the first radio frequency front-end processing unit and the first intermediate frequency baseband signal processing unit and then enters the CPU/ARM control unit, and the CPU/ARM control unit processes the signal and then sends the processed signal to the output antenna after sequentially passing through the second radio frequency front-end processing unit and the second intermediate frequency baseband signal processing unit.

2. The signal processing system of claim 1, wherein the first rf front-end processing unit splits the radio signal into I and Q signals, respectively.

3. The signal processing system of claim 1, wherein the rf front-end processing unit comprises a low noise amplifier LNA, a mixer, a transimpedance amplifier TIA, and a low pass filter LPF, which are connected in sequence, and is transmitted to the if baseband signal processing unit through the a/D conversion module.

4. The signal processing system of claim 3, wherein the intermediate frequency baseband signal processing unit comprises a CIC filter, an HB filter and an FIR filter which are connected in sequence.

5. The signal processing system of claim 4, wherein the sampling rates of the CIC filter, HB filter, and FIR filter are adjusted by changing decimation coefficients.

6. A signal processing system according to claim 1, wherein, at the receiving end, the radio signal is divided into two paths via the input antenna and input to the low noise amplifier LNA of I path and Q path, respectively, and then the amplified radio frequency signal is transmitted to the mixer;

meanwhile, the frequency mixer receives a frequency signal transmitted by the VCO, performs frequency mixing, down-converts a high-frequency radio frequency signal into I and Q intermediate frequency or baseband signals, transmits the I and Q intermediate frequency or baseband signals to the TIA, and then transmits the I and Q intermediate frequency or baseband signals to the LPF, the LPF filters out a higher-frequency signal in the amplified baseband signals and transmits the signal to the CIC filter through the A/D conversion module, and the CIC filter performs high-speed extraction and filtering on the processed baseband signals to reduce the frequency of the baseband signals;

then the low-pass baseband signal is transmitted to an HB filter, the HB filter performs high-speed extraction filtering for reducing the frequency of the baseband signal to obtain the frequency of a low-pass baseband signal, and then the low-pass baseband signal is transmitted to an FIR filter, and the FIR filter shapes and matches the low-pass baseband signal for filtering and finally transmits the low-pass baseband signal to a CPU/ARM control unit.

7. The portable signal reconnaissance interference device is characterized by comprising an antenna and an equipment host;

the antenna comprises an input antenna and an output antenna;

the device host embeds the signal processing system as claimed in any one of claims 1 to 6, and the signal processing system is respectively connected with an input antenna and an output antenna.

8. The portable signal reconnaissance interference device of claim 7, wherein the equipment main unit further comprises the battery pack, and a mode switch, a dual power switch and a display screen are arranged on the surface of the equipment main unit, wherein the mode switch is used for switching among a radio reconnaissance mode, a communication device radio interference mode and a GPS signal interference mode.

9. The portable signal reconnaissance interference device of claim 8, wherein the display screen is an LED display screen, and the LED display screen displays an operating state, a device power level, and communication band information and communication device information of the reconnaissance target radio communication device.

10. The portable signal reconnaissance interference device of claim 8, wherein a power interface is further disposed on a surface of the device host, and the power interface is used for charging the battery pack, connecting to a commercial power supply or connecting to a DC12V power supply.

Technical Field

The present invention relates to the field of communications, and in particular, to a signal interference system and a portable signal interference detection apparatus.

Background

At present, a plurality of special tasks, especially reconnaissance tasks, are available for special arms such as public security departments, army and the like. For telecommunications equipment in a particular area or a region of interest in a particular task, comprising: the normal communication safety of the part in the task process can be influenced by small-sized communication equipment such as an interphone, a mobile phone, a satellite mobile terminal and a small micro unmanned aerial vehicle navigation link, and the communication blockage is ensured so that the part can more effectively complete early-stage reconnaissance tasks at the rear.

In order to ensure that small-sized communication equipment such as an interphone, a mobile phone, a satellite mobile terminal and a small micro unmanned aerial vehicle navigation link of an enemy party performs close-range signal reconnaissance and interference disposal during special operations such as reconnaissance and anti-terrorism, a portable single-soldier signal reconnaissance interference device which integrates reconnaissance and interference disposal of wireless communication equipment in a small range is specially designed. For the technical products for solving the same problem in the current market, the radio detection side and the radio interference are designed separately; the radio interference device has the problems of short interference distance, poor portability, heavy quality and the like.

Disclosure of Invention

The invention aims to provide a signal interference system, which solves the problems of radio detection and radio interference in a special area, interference cutting of a navigation positioning signal of a micro unmanned aerial vehicle and the like, integrates all functions into a whole, and practically realizes the functions of high integration, portability, simplicity and the like.

Collect radio reconnaissance, radio interference, power supply mode in an organic whole becomes whole set of system, and the system includes simultaneously: the system comprises functional components such as an antenna element, a reconnaissance unit, an interference unit, a power distribution unit, a lithium battery pack, centralized control, comprehensive display and the like.

In order to realize the advanced, practical, novel, economic and reliable principle, particularly high integration and portability, the appearance of the device adopts high-strength hard materials as a main machine of the device, the main body is provided with braces, the device is favorable for carrying and using personnel on duty, and a reconnaissance unit, an interference unit, a power distribution unit, a lithium battery pack (detachable), a centralized control unit and a comprehensive display unit are integrally arranged in the device. Meanwhile, in order to be convenient to carry and small in size, 7 external antennas are designed, and complex installation procedures of staff on duty before task execution are reduced as much as possible.

In order to achieve the above purpose, the present invention provides a signal processing system, which adds a broadband intermediate frequency bandpass sampling structure at the signal input end, because the broadband intermediate frequency bandpass sampling structure does not change from the radio frequency to the fundamental frequency at one time, but changes from the radio frequency to the intermediate frequency first, and then changes from the intermediate frequency to the fundamental frequency (the device frequency range is 10-6000 MHz), which is easier to implement. Also, in certain cases, the effect achieved is better than other software radio effects.

Specifically, a signal processing system includes:

at least two sets of radio frequency front end processing units;

at least two sets of intermediate frequency baseband signal processing units;

and a CPU/ARM control unit;

the signal received by the input antenna is sequentially connected with the first radio frequency front-end processing unit and the first intermediate frequency baseband signal processing unit and then enters the CPU/ARM control unit, and the CPU/ARM control unit processes the signal and then sends the processed signal to the output antenna after sequentially passing through the second radio frequency front-end processing unit and the second intermediate frequency baseband signal processing unit.

In a preferred embodiment of the present invention, the first rf front-end processing unit divides the radio signal into I-path and Q-path signals, respectively.

In a preferred embodiment of the present invention, the rf front-end processing unit includes a low noise amplifier LNA, a mixer, a transimpedance amplifier TIA, and a low pass filter LPF, which are connected in sequence, and transmits the signals to the if baseband signal processing unit through an a/D conversion module.

In a preferred embodiment of the present invention, the intermediate frequency baseband signal processing unit includes a CIC filter, an HB filter, and an FIR filter, which are connected in sequence.

In a preferred embodiment of the invention, the sampling rates of the CIC, HB and FIR filters are adjusted by changing the decimation coefficients.

In a preferred embodiment of the present invention, at the receiving end, the radio signal is divided into two paths via the input antenna and respectively input to the low noise amplifier LNA of the I path and the Q path, and then the amplified radio frequency signal is transmitted to the mixer;

meanwhile, the frequency mixer receives a frequency signal transmitted by the VCO, performs frequency mixing, down-converts a high-frequency radio frequency signal into I and Q intermediate frequency or baseband signals, transmits the I and Q intermediate frequency or baseband signals to the TIA, and then transmits the I and Q intermediate frequency or baseband signals to the LPF, the LPF filters out a higher-frequency signal in the amplified baseband signals and transmits the signal to the CIC filter through the A/D conversion module, and the CIC filter performs high-speed extraction and filtering on the processed baseband signals to reduce the frequency of the baseband signals;

then the low-pass baseband signal is transmitted to an HB filter, the HB filter performs high-speed extraction filtering for reducing the frequency of the baseband signal to obtain the frequency of a low-pass baseband signal, and then the low-pass baseband signal is transmitted to an FIR filter, and the FIR filter shapes and matches the low-pass baseband signal for filtering and finally transmits the low-pass baseband signal to a CPU/ARM control unit.

The portable signal reconnaissance interference device comprises an antenna and an equipment host;

the antenna comprises an input antenna and an output antenna;

the signal processing system is embedded in the equipment host and is respectively connected with the input antenna and the output antenna.

In a preferred embodiment of the invention, the equipment main unit further comprises the battery pack, and the surface of the main unit is provided with a mode switch, a dual-power switch and a display screen, wherein the mode switch is used for switching among a radio reconnaissance mode, a communication device radio interference mode and a GPS signal interference mode.

In a preferred embodiment of the present invention, the display screen is an LED display screen, and the LED display screen displays the operating status, the device power level, and the communication frequency band information and the communication device information of the detected target radio communication device.

In a preferred embodiment of the present invention, the surface of the device host is further provided with a power interface, and the power interface is used for charging the battery pack, accessing commercial power or accessing a DC12V power supply.

Compared with the prior art, the invention has the beneficial effects that:

through passive detection and initiative countering equipment to fixed early warning is surveyed fixed and is countering system base station formula integration load-bearing platform, constructs the full-automatic system of countering of listening that collects early warning survey, countering, commander as an organic whole, carries out closely reconnaissance and interference to wireless communication equipment in the small range and deals with, cuts off little unmanned aerial vehicle GPS positioning signal remotely, effectively drives away and deals with little unmanned aerial vehicle in low latitude, ensures regional safety.

Drawings

Fig. 1 is a schematic block diagram of a broadband if bandpass sampling software radio architecture of the present invention.

Fig. 2 is a system configuration diagram of the present invention.

Fig. 3 is a diagram of a product of the invention.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

Referring to fig. 1 and fig. 2, in the present embodiment, a signal processing system includes: at least two sets of radio frequency front end processing units; at least two sets of intermediate frequency baseband signal processing units; and a CPU/ARM control unit; the signal received by the input antenna is sequentially connected with the first radio frequency front-end processing unit and the first intermediate frequency baseband signal processing unit and then enters the CPU/ARM control unit, and the CPU/ARM control unit processes the signal and then sends the processed signal to the output antenna after sequentially passing through the second radio frequency front-end processing unit and the second intermediate frequency baseband signal processing unit.

A detailed software radio system (fig. 2) was designed based on a wideband intermediate frequency bandpass sampling structure (fig. 1).

At a receiving end, radio signals are divided into two paths through an antenna and are respectively input into low noise amplifiers LNA of an I path and a Q path, and then the amplified radio frequency signals are transmitted to a mixer.

Meanwhile, the frequency mixer receives a frequency signal transmitted by a voltage controlled oscillator VCO, performs frequency mixing, down-converts a high-frequency radio frequency signal into I and Q intermediate frequencies or baseband signals (signal loss is prevented, multiple groups of signals are stored and processed after the signals are adopted), transmits the intermediate frequencies or the baseband signals to a transimpedance amplifier TIA and then to a low-pass filter LPF, the low-pass filter filters out a signal with a higher frequency in the amplified baseband signals and transmits the signal to a CIC filter through an A/D conversion module, and the CIC filter performs high-speed extraction and filtering on the processed baseband signals to reduce the frequency of the baseband signals; then the low-pass baseband signal is transmitted to an HB filter, the HB filter performs high-speed extraction filtering for reducing the frequency of the baseband signal to obtain the frequency of a low-pass baseband signal, and then the low-pass baseband signal is transmitted to an FIR filter, and the FIR filter shapes and matches the low-pass baseband signal for filtering and finally transmits the low-pass baseband signal to a CPU/ARM control unit.

The filter has a corresponding frequency range, and if the frequency range is out of range, the filter considers the frequency to be invalid and suppresses the frequency. Comparing the frequencies of 800-900M, the filters below 800 and above 900 are considered as invalid frequencies, and are intended to prevent the scattered power from influencing the overall effect.

The sampling rates of the CIC, HB, and FIR filters can be adjusted by changing the decimation coefficients to produce the desired output data rate.

The design of the CIC, HB, and FIR filters is done in the FPGA. The processor demodulates and decodes in a software mode, detects and processes to generate an interference signal, and the interference signal transmits the signal through an antenna fed by a sending link, so that the interference of the civil wireless communication navigation system is achieved.