CN114814824A - Radio signal fusion monitoring method for receiving front end - Google Patents
Radio signal fusion monitoring method for receiving front end Download PDFInfo
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- CN114814824A CN114814824A CN202210259180.XA CN202210259180A CN114814824A CN 114814824 A CN114814824 A CN 114814824A CN 202210259180 A CN202210259180 A CN 202210259180A CN 114814824 A CN114814824 A CN 114814824A
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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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/86—Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
Abstract
The invention discloses a method for monitoring fusion of radio signals at a receiving front end, which belongs to the field of wireless communication, wherein a first frequency conversion signal is obtained by carrying out first down-conversion processing on the radio signals, and radar signals are subjected to resident monitoring according to the first frequency conversion signal to obtain radar monitoring data; in the residence monitoring time period, performing second down-conversion processing on the first frequency conversion signal to obtain a second frequency conversion signal, and performing synchronous monitoring on the communication signal according to the second frequency conversion signal to obtain communication monitoring data; and collecting the radar monitoring data and the communication monitoring data to complete radio signal monitoring. The invention realizes the synchronous acquisition of radar signals and communication signals, simultaneously carries out the integrated design of digital acquisition on the processing of the radar signals and the processing of the communication signals, and shares processing resources such as FPGA and the like.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a method for monitoring fusion of radio signals of a receiving front end.
Background
In modern electronic countermeasure operations, electronic reconnaissance, electronic interference, electromagnetic attacks, etc., are mainly involved, wherein electronic reconnaissance is the leading basis for implementing other electronic countermeasure operations. The radar signal reconnaissance and communication signal reconnaissance equipment in the conventional electronic reconnaissance equipment is independent from each other in hardware, and reconnaissance result data obtained after signal processing are not related to each other, so that the occupied space and cost of the equipment are increased, and the comprehensive application of mutual support and information is difficult to realize.
Disclosure of Invention
The invention aims to overcome the problems of independent acquisition of radar signals and communication signals in the prior art, and provides a radio signal fusion monitoring method for a receiving front end.
The purpose of the invention is realized by the following technical scheme:
mainly provides a method for monitoring the fusion of radio signals of a receiving front end, which comprises the following steps:
receiving radio signals, the radio signals including radar signals and communication signals;
performing first down-conversion processing on the radio signal to obtain a first variable frequency signal, and performing resident monitoring on the radar signal according to the first variable frequency signal to obtain radar monitoring data;
in the residence monitoring time period, performing second down-conversion processing on the first frequency conversion signal to obtain a second frequency conversion signal, and performing synchronous monitoring on the communication signal according to the second frequency conversion signal to obtain communication monitoring data;
and collecting the radar monitoring data and the communication monitoring data to complete radio signal monitoring.
As an option, the bandwidth of the first frequency-converted signal is 1GHz, and the bandwidth of the second frequency-converted signal is 200 MHz.
As an option, the synchronization monitoring comprises:
and finishing the second frequency conversion processing for multiple times in the residence monitoring time period.
As an option, the method further comprises:
and carrying out fusion processing on the collected radar monitoring data and the collected communication monitoring data, and carrying out integrated display on the same interface.
Specifically, the fusion processing of the collected radar monitoring data and the collected communication monitoring data includes:
and taking the frequency spectrum of the communication monitoring data as a background, and performing marking display on the frequency with radar pulse according to the radar monitoring data.
Specifically, the integrated display of the radar monitoring data and the communication monitoring data on the same interface comprises the following steps:
and performing data sorting on the radar monitoring data and the communication monitoring data, and uniformly displaying sorting results on a data sorting interface.
The invention also provides a receiving front end, which comprises a first filter, a first low-noise amplifier, a first frequency mixer, a second frequency mixer, a radar signal acquisition device and a communication signal acquisition device;
the input end of the first filter receives a radio signal, the output end of the first filter is connected with the input end of the first low-noise amplifier, the output end of the first low-noise amplifier is connected with the input end of the first mixer, and the output end of the first mixer is connected with a radar signal acquisition device; the output end of the first mixer is also connected with the input end of the second mixer, and the output end of the second mixer is connected with the communication signal acquisition device;
the first mixer is configured to perform a first down-conversion process on the radio signal, and the second mixer is configured to perform a second down-conversion process on the first frequency-converted signal.
As an option, a second filter is arranged between the first low noise amplifier and the first mixer, a third filter is arranged between the first mixer and the second mixer, and a second low noise amplifier is arranged between the second mixer and the communication signal acquisition device.
The invention also provides a monitoring system composed of the receiving front end, and the system further comprises:
an antenna array for receiving radio signals;
the control end is used for sending a signal with a certain frequency to the receiving front end according to the radio signal, and the control end is also used for controlling the work of the receiving front end;
and the upper computer is used for receiving, analyzing and displaying the data sent by the front end.
As an option, a gesture detection device is also integrated into the system.
It should be further noted that the technical features corresponding to the above options can be combined with each other or replaced to form a new technical solution without conflict.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, a radio signal is subjected to first down-conversion processing to obtain a first variable frequency signal, the radar signal is monitored according to the first variable frequency signal, a second variable frequency signal is obtained through second down-conversion processing in a time period for monitoring the radar signal, and the communication signal is monitored according to the second variable frequency signal, so that synchronous acquisition of the radar signal and the communication signal is realized.
(2) The integrated radio frequency front end simultaneously outputs two independent intermediate frequency signals for acquisition and processing of radar signals and communication signals respectively, so that processing resources such as an FPGA (field programmable gate array) are shared by processing flows of the radar signals and the communication signals, the space is saved, and the cost is reduced.
(3) The collected radar monitoring data and the collected communication monitoring data are subjected to fusion processing and integrally displayed on the same interface, so that mutual support of two signals and comprehensive application of information are realized.
Drawings
Fig. 1 is a flow chart of a method for monitoring the fusion of radio signals received from a front end according to the present invention.
FIG. 2 is a schematic diagram of a receive front end according to the present invention;
FIG. 3 is a flow chart of the monitoring system of the present invention for monitoring radio signals;
FIG. 4 is a diagram of a communication monitoring spectrum according to the present invention;
FIG. 5 is a communication radar monitoring fusion diagram according to the present invention;
fig. 6 is a diagram showing the effect of radar sorting information according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that directions or positional relationships indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are directions or positional relationships described based on the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention mainly carries out integrated design on the processing flow of the radar signals and the communication signals, and realizes synchronous acquisition and resource sharing of the radar signals and the communication signals.
Example 1
In an exemplary embodiment, as shown in fig. 1, there is provided a radio signal fusion monitoring method of a reception front end, the method comprising:
receiving radio signals, the radio signals including radar signals and communication signals;
performing first down-conversion processing on the radio signal to obtain a first variable frequency signal, and performing resident monitoring on the radar signal according to the first variable frequency signal to obtain radar monitoring data;
in the residence monitoring time period, performing second down-conversion processing on the first frequency conversion signal to obtain a second frequency conversion signal, and performing synchronous monitoring on the communication signal according to the second frequency conversion signal to obtain communication monitoring data;
and collecting the radar monitoring data and the communication monitoring data to complete radio signal monitoring.
In particular, since radar/communication monitoring devices are generally broadband systems, microwave front-ends, receivers, power amplification, etc. are generally overlaid on each other in terms of frequency band. In the radar communication integrated design, a receiver is generally required to accurately monitor radar and communication signals in a full frequency band with high sensitivity and high interception probability, and the high interception probability requires a very large instantaneous working bandwidth at a receiving front end, which is a group of conflicting requirements with the high sensitivity.
The requirements of the radar signal and the communication signal on the bandwidth and the sensitivity are different, the bandwidth of the radar signal can reach hundreds of MHz to 1GHz, and the power is generally higher; while the bandwidth of the communication signal is relatively narrow, typically not exceeding 200MHz at maximum, and the power is typically low. Therefore, the monitoring of the radar signal needs a large bandwidth, and the requirement on the sensitivity is relatively low; and the monitoring of the communication signals needs small bandwidth and has higher requirements on sensitivity. Therefore, the different requirements of bandwidth and sensitivity of communication signals and radar signals need to be considered.
Further, after performing first down-conversion processing on a received radio signal which has both a communication signal and a radar signal, a first frequency conversion signal is obtained, wherein the first frequency conversion signal is an intermediate frequency signal subjected to down-conversion, and has two purposes, one of which is that the first frequency conversion signal meets the requirements of radar signal monitoring on bandwidth and sensitivity, and can be used for radar signal monitoring; and secondly, performing second down-conversion processing on the first frequency conversion signal to obtain a second frequency conversion signal with lower frequency, wherein the bandwidth of the second frequency conversion signal meets the requirement of the monitoring sensitivity of the communication signal and is used for monitoring the communication signal.
The key point is that the radar signal monitoring system can stay for a period of time, and communication signals need to be monitored in the period of time, so that synchronous acquisition and resource sharing of the radar signals and the communication signals are realized.
Example 2
The embodiment 1 is based on a method for monitoring the fusion of radio signals at a receiving front end, wherein the bandwidth of the first frequency conversion signal is 1GHz, and the bandwidth of the second frequency conversion signal is 200 MHz. The synchronous monitoring comprises:
and finishing the second frequency conversion processing for multiple times in the residence monitoring time period.
Specifically, the intermediate frequency of the intermediate frequency signal of the first frequency conversion is high, the bandwidth can reach 1GHz, and the intermediate frequency of the intermediate frequency signal of the second frequency conversion can be used for monitoring radar signals, and the intermediate frequency of the intermediate frequency signal of the second frequency conversion is low, the bandwidth can reach 200MHz, and the intermediate frequency signal of the second frequency conversion can be used for monitoring communication signals, so that different requirements of the communication signals and the radar signals on the bandwidth and the sensitivity are met. When the bandwidth of the first frequency conversion signal is 1GHz, the time of staying for at least fifty milliseconds of the intermediate frequency signal after the first frequency conversion is used for monitoring the radar signal, generally speaking, the time of collecting and processing the 200MHz signal only needs 2-4 milliseconds, and the collection and processing of the 200MHz bandwidth signal can be completed for 5 times within the radar monitoring staying time.
Example 3
Based on embodiment 1, a method for monitoring fusion of radio signals at a receiving front end is provided, and the method further includes:
and carrying out fusion processing on the collected radar monitoring data and the collected communication monitoring data, and carrying out integrated display on the same interface.
Further, the fusion processing of the collected radar monitoring data and the collected communication monitoring data includes:
and taking the frequency spectrum of the communication monitoring data as a background, and performing marking display on the frequency with radar pulse according to the radar monitoring data.
Further, the radar monitoring data and the communication monitoring data are displayed integrally on the same interface, and the method comprises the following steps:
the method comprises the steps of carrying out data sorting on radar monitoring data and communication monitoring data, and displaying sorting results on a data sorting interface in a unified mode, wherein the sorting is to obtain parameter information of signals, for example, the radar sorting is to obtain parameter information of working frequency, pulse width, pulse amplitude, pulse arrival time and the like of radar signals, and the communication sorting is to obtain information of the working frequency, modulation mode, signal bandwidth, signal amplitude and the like of communication signals.
The integrated result shows that the mutual support and the comprehensive application of information of the two signals are realized.
Example 4
In this embodiment, there is provided a receiving front end, as shown in fig. 2, including a first filter, a first low noise amplifier, a first mixer, a second mixer, a radar signal acquisition device, and a communication signal acquisition device;
the input end of the first filter receives a radio signal, the output end of the first filter is connected with the input end of the first low-noise amplifier, the output end of the first low-noise amplifier is connected with the input end of the first mixer, and the output end of the first mixer is connected with a radar signal acquisition device; the output end of the first mixer is also connected with the input end of the second mixer, and the output end of the second mixer is connected with the communication signal acquisition device;
the first mixer is configured to perform a first down-conversion process on the radio signal, and the second mixer is configured to perform a second down-conversion process on the first frequency-converted signal.
Further, a second filter is arranged between the first low noise amplifier and the first mixer, a third filter is arranged between the first mixer and the second mixer, and a second low noise amplifier is arranged between the second mixer and the communication signal acquisition device.
Specifically, the first filter receives radio signals RF, the first mixer performs down-conversion to obtain IF2 signals with the bandwidth reaching 1GHz, the second mixer performs down-conversion to IF2 to obtain IF3 signals with the bandwidth reaching 200MHz, the IF2 after the first frequency conversion stays for at least fifty milliseconds to be used for monitoring radar, the second mixer can be set in a frequency conversion mode in the time, the time for collecting and processing the 200MHz signals is only 2-4 milliseconds generally, the frequency setting and collecting processing of the 200MHz bandwidth signals can be completed for 5 times in the radar monitoring stay time, and the synchronous collecting and processing of the radar and communication signals can be realized.
Example 5
Based on embodiment 4, there is provided a monitoring system constituted by the receiving front end, the monitoring system further comprising:
an antenna array for receiving radio signals;
the control end is used for sending a signal with a certain frequency to the receiving front end according to the radio signal, and the control end is also used for controlling the work of the receiving front end;
and the upper computer is used for receiving, analyzing and displaying the data sent by the front end.
Specifically, as shown in fig. 3, a flow schematic of the monitoring system is given, when monitoring starts, the antenna array receives a radio signal, sets a frequency through the control end and sends an RF signal with a certain frequency to the receiving front end, after the receiving front end undergoes first down-conversion, the obtained first frequency-converted signal is respectively output to the radar signal collection device and used for second frequency conversion, the radar signal collection device performs collection and sorting of radar signals, and the collection and sorting time is 50 ms.
Furthermore, the IF2 after the second down-conversion is changed into IF3 with a lower frequency, the IF3 is output to a communication signal acquisition device, the communication signal acquisition device acquires and sorts the communication signals, the time of single acquisition processing is 5ms, the total time of 5 acquisition is 25ms, and the acquisition of the communication signals can be completed within the acquisition processing time of the radar signals.
Further, in the figure, the frequency setting means setting a frequency for the first mixer, the frequency switching means setting a frequency for the second mixer, as shown in fig. 4, the abscissa represents a frequency, the ordinate represents an amplitude, f0 represents a frequency of the frequency setting, the whole abscissa represents a signal with a frequency bandwidth of 1GHz, the abscissa in the figure is that the frequency bandwidth to be detected is divided into 10 parts on average, 10 frequency points are counted from f0-5 to f0+5, each part represents one tenth of the frequency bandwidth, for example, the frequency bandwidth of 1GHz, each part is 100MHz, f0-4 represents a frequency point of f0-400MHz, and the other frequency points are calculated in sequence, the frequency bandwidth is 800MHz, each part is 80MHz, and the ordinate represents the amplitude value of the corresponding frequency point.
Further, the results of 5 frequency-cut post-splicing (once 200MHz) of the right communication monitoring section in the flowchart of FIG. 3 are calculated per 200MHz, where the 5 frequency-cuts are f0-400MHz, f0-200MHz, f0, f0+200MHz, and f0+400MHz, respectively, during which the f0 of the first mixer remains unchanged.
Further, as can be seen from the flowchart in fig. 3, radar monitoring and communication monitoring are performed in parallel, as shown in fig. 5, radar sorting result data is firstly marked on a background of communication monitoring spectrum data according to frequency, a line is marked on a frequency point with a radar pulse signal, as shown in fig. 4 batches of radar signals are respectively represented by L1, L2, L3, and L4, specific sorting result information of each batch of radar signals can be displayed by double-clicking the radar batch number in fig. 5, and popping up a mark frame, as shown in fig. 6, and double-clicking the L1 batch number, so that a radar information display about the batch number can be obtained.
Further, after the fusion display, the frequency domain coverage is performed, since the frequency band range is input during the monitoring, such as 1 GHz-18 GHz, and the frequency setting (f0) can only complete the monitoring of the 1GHz bandwidth each time, 17 times of frequency setting is required, and if the scanning of the frequency band is not set, the frequency setting f0+1GHz continues to circulate the flow chart until all the monitoring frequency bands are covered.
And uploading the radar monitoring data and the communication monitoring data obtained by synchronous acquisition to an upper computer for fusion display.
As an electronic reconnaissance apparatus used in an offshore environment, it is required that the apparatus can be adapted to environments such as river and sea, and can operate in an environment of high salt mist, high temperature, and high humidity. At present, electronic reconnaissance is mostly used in a land environment, and integrated electronic reconnaissance equipment suitable for a marine environment is lacked.
As an electronic reconnaissance apparatus used at sea, there is a demand for an apparatus capable of coping with irregular rolling of a water surface carrier (a ship, a floating platform, etc.). When the electronic reconnaissance equipment is carried on a ship or a floating platform to work on the sea surface, the ship body or the floating platform swings back and forth, shakes left and right, fluctuates up and down and other complex motions under the influence of factors such as wind speed, sea waves and the like. The shake can change the position, polarization attribute and the like of the reconnaissance antenna, and can cause great influence on each reconnaissance result, thereby influencing the correct judgment of the information.
Reasonable material selection, three-proofing structural design, corrosion environment control, surface coating and chemical treatment, condensation treatment, biological and stress corrosion protection and other treatment measures are adopted, so that the equipment can meet the use conditions of various offshore environments, and can adapt to special environments such as marine tropical monsoon climate, temperature, humidity, salinity, biology, radiation, wind power and the like.
Furthermore, a gesture detection device is integrated in the system. The attitude detection equipment comprises an inertial sensor and a magnetometer sensor, wherein the inertial sensor consists of an accelerometer and a gyroscope, so that attitude information such as an azimuth angle, a pitch angle and a roll angle of the equipment can be obtained in real time, the influence of the environment on a reconnaissance result is reduced through the correlation processing of data and the attitude information, and more accurate information is obtained.
The above detailed description is for the purpose of describing the invention in detail, and it should not be construed that the detailed description is limited to the description, and it will be apparent to those skilled in the art that various modifications and substitutions can be made without departing from the spirit of the invention.
Claims (4)
1. A method for monitoring radio signal convergence in a receive front-end, the method comprising:
receiving radio signals, the radio signals including radar signals and communication signals;
performing first down-conversion processing on the radio signal to obtain a first frequency conversion signal, and performing residence monitoring on the radar signal according to the first frequency conversion signal to obtain radar monitoring data;
in the residence monitoring time period, performing second down-conversion processing on the first frequency conversion signal to obtain a second frequency conversion signal, and performing synchronous monitoring on the communication signal according to the second frequency conversion signal to obtain communication monitoring data;
collecting the radar monitoring data and the communication monitoring data, fusing the collected radar monitoring data and the collected communication monitoring data, and integrally displaying on the same interface to complete radio signal monitoring;
the radar monitoring data and the communication monitoring data which are collected are subjected to fusion processing, and integrated display is carried out on the same interface, and the method comprises the following steps:
the method comprises the steps of carrying out radar data sorting on radar monitoring data to obtain a plurality of batches of radar signal data, carrying out communication data sorting on communication monitoring data to obtain communication monitoring frequency spectrum data;
marking the radar signal data on the background of communication monitoring frequency spectrum data according to frequency, and fusing and displaying the radar signal data and the communication monitoring frequency spectrum data;
performing a frequency domain overlay after the fused display, the frequency domain overlay comprising:
and carrying out frequency setting scanning on the frequency band to be monitored for multiple times until all the monitored frequency bands are covered.
2. The method for fusion monitoring of radio signals of a receiving front end according to claim 1, wherein a line is marked on a frequency point of a radar pulse signal on a background of communication monitoring spectrum data, and radar signals of different lot numbers are displayed.
3. The method for monitoring fusion of radio signals of a receiving front end according to claim 2, wherein the batch number of the radar signal is clicked to obtain radar information display of the corresponding batch number.
4. The method for fusion monitoring of radio signals at a receiving front end according to claim 1, wherein the frequency band to be monitored is 1 GHz-18 GHz, and the frequency setting is performed 17 times after completing the monitoring of 1GHz bandwidth each time.
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| CN112763985B (en) * | 2020-12-25 | 2023-07-14 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Pulse Doppler radar sounding integrated waveform design method |
| CN113108767A (en) * | 2021-04-07 | 2021-07-13 | 王陶然 | Real-time monitoring method for hydrological information of unmanned aerial vehicle-mounted radar |
| CN113671448A (en) * | 2021-09-30 | 2021-11-19 | 南京国立电子科技有限公司 | Universal broadband radar signal monitoring equipment |
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2021
- 2021-12-07 CN CN202210259180.XA patent/CN114814824A/en active Pending
- 2021-12-07 CN CN202111487105.0A patent/CN113884988B/en active Active
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| CN113884988B (en) | 2022-03-18 |
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