CN111751617A - Miniature frequency spectrum sensor - Google Patents
Miniature frequency spectrum sensor Download PDFInfo
- Publication number
- CN111751617A CN111751617A CN202010463854.9A CN202010463854A CN111751617A CN 111751617 A CN111751617 A CN 111751617A CN 202010463854 A CN202010463854 A CN 202010463854A CN 111751617 A CN111751617 A CN 111751617A
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- China
- Prior art keywords
- time service
- radio frequency
- processor
- positioning module
- frequency
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
- G01R23/165—Spectrum analysis; Fourier analysis using filters
- G01R23/167—Spectrum analysis; Fourier analysis using filters with digital filters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/25—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
- G01S19/256—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS relating to timing, e.g. time of week, code phase, timing offset
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/33—Multimode operation in different systems which transmit time stamped messages, e.g. GPS/GLONASS
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/04—Details
- G01S3/12—Means for determining sense of direction, e.g. by combining signals from directional antenna or goniometer search coil with those from non-directional antenna
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mathematical Physics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention discloses a miniature frequency spectrum sensor which comprises a time service positioning module, a UHF directional antenna, a multi-band radio frequency preselection filter, a radio frequency agility transceiver, a processor, a voice codec and a voice player, wherein the UHF directional antenna, the multi-band radio frequency preselection filter and the radio frequency agility transceiver are respectively connected in sequence, the radio frequency agility transceiver is connected with the processor through an SPI control line, the processor is respectively connected with the time service positioning module, the voice codec and the voice player, and the processor is also connected with a PC through an Ethernet. The frequency spectrum data of the micro frequency spectrum sensor provided by the invention carries time service positioning information, can realize the rapid positioning of signals, and can realize the real-time reporting of illegal radio signals. In addition, the invention can be applied to certain frequency monitoring places, can realize wireless directional monitoring, searching and intercepting the position of the transmitter, and has extremely high concealment.
Description
Technical Field
The invention belongs to the field of spectrum receivers, and particularly relates to a miniature spectrum sensor.
Background
The existing frequency spectrum receiver has the defects of narrow frequency bandwidth load, poor sensitivity or narrow dynamic range, can not cover the 2-6 GHz frequency band widely used by people at present, can not realize the gridding monitoring of the frequency spectrum, and can not realize the all-time-domain and all-weather monitoring of the radio frequency spectrum in a key coverage area. The existing frequency spectrum receiver is large in size, inconvenient to install and poor in concealment, and illegal frequency spectrum data can be transmitted and stored in real time.
Disclosure of Invention
The invention aims to provide a miniature frequency spectrum sensor which is small in size, high in sensitivity, wide in dynamic range, convenient to hide and install and carries time service positioning information through frequency spectrum data, and overcomes the defects of the prior art.
The miniature frequency spectrum sensor comprises a time service positioning module, a UHF directional antenna, a multi-band radio frequency preselection filter, a radio frequency agility transceiver, a processor, a voice codec and a voice player, wherein the UHF directional antenna, the multi-band radio frequency preselection filter and the radio frequency agility transceiver are respectively connected in sequence, the radio frequency agility transceiver is connected with the processor through an SPI control line, the processor is respectively connected with the time service positioning module, the voice codec and the voice player, and the processor is also connected with a PC through an Ethernet; the time service positioning module is used for realizing the rapid positioning of the geographical position information of the micro frequency spectrum sensors and realizing the clock information synchronization of the micro frequency spectrum sensors; the UHF directional antenna adopts a single-channel Watson-Watt direction-finding machine technology, orthogonal direction-finding antenna signals are respectively modulated by two low-frequency signals, then frequency conversion and amplification are carried out through a multi-band radio frequency preselection filter, direction information signals are demodulated, then an arctan value is solved, an incoming wave direction is given, and the coherent direction-finding technology of a plurality of miniature frequency spectrum sensors is combined to realize direction finding and rapid positioning of radio signals.
Furthermore, the time service positioning module is a dual-mode time service positioning module, and the dual-mode time service positioning module comprises a GPS positioning unit and a Beidou positioning unit.
Furthermore, the dual-mode time service positioning module adopts a T302-3 type high-precision time service positioning module.
Furthermore, the micro spectrum sensor also comprises a USB memory, a FLASH memory and an SDRAM memory, wherein the USB memory, the FLASH memory and the SDRAM memory are respectively connected with the processor, the USB memory is used for storing the monitoring spectrum data, and the FLASH memory is used for loading the program.
Further, the processor includes XC7Z020-2CLG484I chips.
Further, the radio frequency agile transceiver includes an AD9364 chip.
Further, the speech codec comprises a WM8731 chip.
The invention has the beneficial effects that:
1) the GPS time service positioning module can realize the quick positioning of the geographical position information of the equipment, realize the clock information synchronization of a plurality of micro sensors, and realize the quick positioning of signals by combining a UHF directional antenna;
2) the invention can realize the local USB storage of data, and the processor adopts the database technology to realize the real-time report of illegal radio signals;
3) the invention can be applied to certain frequency monitoring places, realizes wireless directional monitoring, searching and intercepting the position of the transmitter, and has extremely high concealment.
Drawings
FIG. 1 is a block diagram of the present invention.
Figure 2 is a block diagram of a multiband radio frequency preselection filter architecture.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in FIG. 1, the micro spectrum sensor provided by the invention comprises a time service positioning module, a UHF directional antenna, a multi-band radio frequency preselection filter, a radio frequency agility transceiver, a processor, a voice codec and a voice player, wherein the UHF directional antenna, the multi-band radio frequency preselection filter and the radio frequency agility transceiver are respectively connected in sequence, the radio frequency agility transceiver is connected with the processor through an SPI control line, the processor is respectively connected with the time service positioning module, the voice codec and the voice player, and the processor is further connected with a PC through an Ethernet. The time service positioning module is used for realizing rapid positioning of the geographical position information of the micro frequency spectrum sensors and realizing clock information synchronization of the micro frequency spectrum sensors. The UHF directional antenna adopts a single-channel Watson-Watt direction-finding machine technology, orthogonal direction-finding antenna signals are respectively modulated by two low-frequency signals, then frequency conversion and amplification are carried out through a multi-band radio frequency preselection filter, direction information signals are demodulated, then an arctan value is solved, an incoming wave direction is given, and the coherent direction-finding technology of a plurality of miniature frequency spectrum sensors is combined to realize direction finding and rapid positioning of radio signals.
In the embodiment of the invention, the time service positioning module is a dual-mode time service positioning module, the dual-mode time service positioning module comprises a GPS positioning unit and a Beidou positioning unit, and the dual-mode time service positioning module is a T302-3 type high-precision time service positioning module. The micro spectrum sensor further comprises a USB memory, a FLASH memory and an SDRAM memory, wherein the USB memory, the FLASH memory and the SDRAM memory are respectively connected with the processor, the USB memory is used for storing monitoring spectrum data, and the FLASH memory is used for loading programs. The processor comprises an XC7Z020-2CLG484I chip, the radio frequency agility transceiver comprises an AD9364 chip, and the audio player comprises a WM8731 chip. Specifically, the embodiment of the invention can achieve the following steps: the direction-finding precision is less than or equal to 2 degrees, the GPS positioning precision is less than or equal to 3M, the time service precision is less than or equal to 15ns, and the test precision is less than or equal to 0.1M/s.
In the invention, the processor realizes the FFT transformation of the radio signal IQ data based on the FPGA and the DSP and realizes the local USB storage of the real-time IQ data. And the data base storage algorithm is adopted for comparison, and the preset frequency spectrum data is subjected to redundancy comparison, so that the illegal radio signals are reported in real time. In addition, the processor is based on a shaping filter, and filters the baseband signal to make the baseband signal become a signal with infinite time domain and finite frequency, so that signal distortion caused by signal band limitation is eliminated, and noise is effectively suppressed. Meanwhile, a digital filter method is adopted to design a matched filter to effectively filter noise, so that the signal phase noise reaches less than or equal to-110 dBc/10 Hz.
The miniature frequency spectrum sensor consists of an amplifier, an attenuator, a filter, a radio frequency switch, a mixer and other devices. When the equipment runs, the processor can switch the radio frequency switch according to the scanning frequency to form a corresponding channel. The signal undergoes different processing on each channel to ensure that the optimum signal is fed into the back-end signal processing unit. The multi-band preselection filter adopts a structure as shown in figure 2, and the multi-band preselection filter adopts multi-loop filtering and digital control technology to solve the technical problem that harmonic waves appear in fixed-point scanning of 15-70 MHz. The pre-selector is as follows: signals are input by an input antenna 1 (15 MHz-3600 MHz) and an input antenna 2 (3600 MHz-6000 MHz) according to frequency, a pre-selector has an automatic amplification gain control function, and strong suppression and harmonic removal are effectively carried out on out-of-band interference signals by adopting multi-stage filtering, so that the accuracy of receiving the signals is ensured.
The frequency spectrum data of the micro frequency spectrum sensor provided by the invention carries time service positioning information, can realize the rapid positioning of signals, and can realize the real-time reporting of illegal radio signals. In addition, the invention can be applied to certain frequency monitoring places, can realize wireless directional monitoring, searching and intercepting the position of the transmitter, and has extremely high concealment.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The miniature frequency spectrum sensor is characterized by comprising a time service positioning module, a UHF directional antenna, a multi-band radio frequency preselection filter, a radio frequency agility transceiver, a processor, a voice codec and a voice player, wherein the UHF directional antenna, the multi-band radio frequency preselection filter and the radio frequency agility transceiver are respectively connected in sequence, the radio frequency agility transceiver is connected with the processor through an SPI control line, the processor is respectively connected with the time service positioning module, the voice codec and the voice player, and the processor is also connected with a PC through an Ethernet; the time service positioning module is used for realizing the rapid positioning of the geographical position information of the micro frequency spectrum sensors and realizing the clock information synchronization of the micro frequency spectrum sensors; the UHF directional antenna adopts a single-channel Watson-Watt direction-finding machine technology, orthogonal direction-finding antenna signals are respectively modulated by two low-frequency signals, then frequency conversion and amplification are carried out through a multi-band radio frequency preselection filter, direction information signals are demodulated, then an arctan value is solved, an incoming wave direction is given, and the coherent direction-finding technology of a plurality of miniature frequency spectrum sensors is combined to realize direction finding and rapid positioning of radio signals.
2. The micro spectrum sensor according to claim 1, wherein the time service positioning module is a dual-mode time service positioning module, and the dual-mode time service positioning module comprises a GPS positioning unit and a beidou positioning unit.
3. The micro spectrum sensor according to claim 2, wherein the dual mode time service positioning module is a T302-3 type high precision time service positioning module.
4. The micro spectrum sensor according to claim 1, further comprising a USB memory, a FLASH memory and an SDRAM memory, wherein the USB memory, the FLASH memory and the SDRAM memory are respectively connected to the processor, the USB memory is used to store the monitored spectrum data, and the FLASH memory is used to load the program.
5. The micro spectrum sensor of claim 1, wherein the processor comprises XC7Z020-2CLG484I chip.
6. The miniature spectrum sensor of claim 1, wherein said radio frequency agile transceiver comprises an AD9364 chip.
7. The micro spectrum sensor of claim 1, wherein the speech codec comprises a WM8731 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010463854.9A CN111751617A (en) | 2020-05-27 | 2020-05-27 | Miniature frequency spectrum sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010463854.9A CN111751617A (en) | 2020-05-27 | 2020-05-27 | Miniature frequency spectrum sensor |
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| CN111751617A true CN111751617A (en) | 2020-10-09 |
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| CN202010463854.9A Pending CN111751617A (en) | 2020-05-27 | 2020-05-27 | Miniature frequency spectrum sensor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU52548U1 (en) * | 2005-09-28 | 2006-03-27 | Открытое акционерное общество "Научно-производственный комплекс "Научно-исследовательский институт дальней радиосвязи" (ОАО НПК НИИДАР) | RECEIVER |
| US20090045798A1 (en) * | 2007-08-14 | 2009-02-19 | Agilent Technologies, Inc. | Synchronization of Spectrum Analyzer Frequency Sweep and External Switch |
| CN101969649A (en) * | 2003-02-26 | 2011-02-09 | 安德鲁有限责任公司 | Honeycomb signal enhancer |
| CN207283531U (en) * | 2017-10-12 | 2018-04-27 | 成都九洲迪飞科技有限责任公司 | A kind of ultra-broadband digital receiver |
| CN108847855A (en) * | 2018-06-26 | 2018-11-20 | 成都九洲迪飞科技有限责任公司 | Miniature spectral sensor |
-
2020
- 2020-05-27 CN CN202010463854.9A patent/CN111751617A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969649A (en) * | 2003-02-26 | 2011-02-09 | 安德鲁有限责任公司 | Honeycomb signal enhancer |
| RU52548U1 (en) * | 2005-09-28 | 2006-03-27 | Открытое акционерное общество "Научно-производственный комплекс "Научно-исследовательский институт дальней радиосвязи" (ОАО НПК НИИДАР) | RECEIVER |
| US20090045798A1 (en) * | 2007-08-14 | 2009-02-19 | Agilent Technologies, Inc. | Synchronization of Spectrum Analyzer Frequency Sweep and External Switch |
| CN207283531U (en) * | 2017-10-12 | 2018-04-27 | 成都九洲迪飞科技有限责任公司 | A kind of ultra-broadband digital receiver |
| CN108847855A (en) * | 2018-06-26 | 2018-11-20 | 成都九洲迪飞科技有限责任公司 | Miniature spectral sensor |
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