CN205787100U - A kind of frequency self adaptation noise trap - Google Patents
A kind of frequency self adaptation noise trap Download PDFInfo
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- CN205787100U CN205787100U CN201620519937.4U CN201620519937U CN205787100U CN 205787100 U CN205787100 U CN 205787100U CN 201620519937 U CN201620519937 U CN 201620519937U CN 205787100 U CN205787100 U CN 205787100U
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Abstract
The utility model discloses a kind of frequency self adaptation noise trap, including controller, transmit-receive switch, step-by-step movement frequency source, transmitting branch and receiving branch, com-parison and analysis circuit, the instruction of counter-measure frequency management wherein can be sent when controller detects interference, transmit-receive switch cuts out transmitting branch, step-by-step movement frequency source will perform the jump frequency action as fixed frequency of the stepping amplitude with Microsecond grade time interval, receiving branch forms video signal after being processed by received extraneous signal, the level of described video signal is compared by com-parison and analysis circuit for each Frequency point, select the Frequency point of signal amplitude minimum as operating frequency, selected Frequency point is sent to step-by-step movement frequency source by controller, so far the adaptive management process of frequency is completed.In tens of microseconds time frame, quickly whole frequency range be can scan, by comparing examination, best effort frequency, automatic locking frequency selected, it is ensured that detecting devices properly functioning.
Description
Technical field
The present invention relates to radio communication, relate more specifically to a kind of frequency self adaptation noise trap.
Background technology
Radio position finding radio directional bearing is that detection is aerial, the important means of the moving target on ground, by receiving the reflection launching signal
Ripple adds survey to target, is widely used in the fields such as military affairs, civil aviaton and security protection.Due to its special round-the-clock detection target
Performance, is easily subject to RI radio intelligence artificial, natural same frequency interference so that it is detection usefulness weakens and even lost efficacy.Harm
The interference hindering radio fixing aid(s) normally to work is mainly identical with equipment operating frequency by transmitting, wave characteristics is close
Wireless signal, effectively captures the communication channel of reception system so that it is can not normally receive target reflection ripple signal.Some strong jammings
Signal even can block reception passage so that it is blinding.These interference signals may come to hostile artifactual epochs, it is also possible to by
In environmental factors interference such as radio and television, radio set, industrial spark, electric power interference.For the frequency range that avoids interference, common do
Method is to adjust transmitting, reception frequency, selects noiseless or that interference signal is more weak band operation.But, artificial attack interference because of
For possessing detecting means, can aim at speed Tracking faster, make equipment be difficult to break away from puzzlement.On the other hand, frequency speed is manually changed
Degree is slow, is difficult to find that suitable working frequency points in the case of interference band is the widest, so can greatly be delayed detection and monitor
Timeliness.Need a kind of device can be adaptive selected suitable working frequency points when interference being detected, thus solve existing skill
The shortcoming manually changing frequency in art.
Summary of the invention
It is an object of the invention to provide a kind of frequency self adaptation noise trap, mainly solve radio location device and exist
The fast automatic effect of signals that avoids interference on time domain, frequency domain so that can be adaptive selected when interference being detected suitably
Working frequency points, thus avoid manually changing the shortcomings such as frequency speed is slow.
For achieving the above object, the technical scheme that the present invention provides is as follows:
A kind of frequency self adaptation noise trap, including controller, transmit-receive switch, step-by-step movement frequency source, transmitting branch and
Receiving branch, com-parison and analysis circuit, wherein can send the instruction of counter-measure frequency management, institute when described controller detects interference
Stating transmit-receive switch and will close transmitting branch after receiving the instruction of described counter-measure frequency management, described step-by-step movement frequency source is connecing
The stepping amplitude jump frequency as fixed frequency is performed with Microsecond grade time interval after receiving the instruction of described counter-measure frequency management
Action, described transmitting branch and receiving branch synchronously perform identical jump frequency action, the extraneous signal that antenna receives
Being input to described receiving branch after described transmit-receive switch, described receiving branch is formed after being processed by received signal
Video signal, the level of described video signal is compared by described com-parison and analysis circuit for each Frequency point, selects signal
Selected Frequency point is sent to step-by-step movement frequency source as operating frequency, described controller, refers to by the Frequency point of amplitude minimum
Make described step-by-step movement frequency source stop frequency sweep being placed in described Frequency point, instruct simultaneously described transmit-receive switch open described transmitting lead to
Road, so far completes the adaptive management process of frequency.
Further, described transmitting branch includes baseband signal generator, frequency mixer, upper turn of frequency device, wherein said base band
The output of signal generator is connected to described frequency mixer, and the output of described frequency mixer is connected to the described upper frequency device that turns, and described upper turns
Frequently it is transmitted into described transmit-receive switch by transmitter after the signal of the output of device is filtered.
Further, described receiving branch includes low-noise amplifier, lower turn of frequency device, wave filter, intermediate frequency amplifier 1, mixed
Frequently device, intermediate frequency amplifier 2 and video detection amplifier, described low-noise amplifier receives the signal from described transmit-receive switch,
The output of described low-noise amplifier is connected to described wave filter, and the output of described wave filter is connected to described intermediate frequency amplifier 1,
The output of described intermediate frequency amplifier 1 is connected to described frequency mixer, and the output of described frequency mixer is connected to described intermediate frequency amplifier 2,
The output of described intermediate frequency amplifier 2 is connected to described video detection amplifier, and the output of described video detection amplifier is connected to institute
State com-parison and analysis circuit.
Further, described step-by-step movement frequency source can be Direct Digital Frequency Synthesizers.
Further, described step-by-step movement frequency source performs jump frequency after receiving the instruction of described counter-measure frequency management
The stepping amplitude of action is 5MHz.
This device uses computer autocontrol technique and frequency source sweep frequency technique, at the effective band model launched, receive
Enclose and interior quickly search the element interference the most weak Frequency point of signal, and automatically lock frequency optimum traffic, disturb in case of followed the tracks of, again with quickly
Conversion system tripping interference band, quickly can scan whole frequency range in tens of microseconds time frame, by comparing examination, selects
Best effort frequency, automatic locking frequency, automatization, intelligentized frequency management are kept away effectively with its action fast and accurately
Open various natural, artificial wireless interference signal, it is ensured that detecting devices properly functioning.This device preferably solves time domain
With anti interference problem while of on frequency domain, carry out the effective means of frequency management for radio device.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of noise trap of the present utility model；
The electrical block diagram of one embodiment of Fig. 2 noise trap of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be described in detail:
Fig. 2 is the electrical block diagram of an embodiment of noise trap of the present utility model.Radiofrequency signal can be divided
For uplink and downlink two parts, it is transmitting branch up and down, lower behavior receiving branch.Self adaptation counter-measure emphasis monitoring receiving branch
Signal, selects the frequency of interference level minimum as new operating point in numerous frequencies.For effectively receiving echo-signal, so
Transmitting branch should synchronize frequency sweep therewith.Up transmitting branch includes baseband signal generator, frequency mixer, upper turn of frequency device；Descending connect
Revenue and expenditure road includes low-noise amplifier, lower turn of frequency device, puts in 1, wave filter, frequency mixer, puts and detector amplifier etc. in 2.
When being disturbed, manual intervention carry out adaptive frequency management.Controller sends instruction and cuts out transmit-receive switch
Send out branch road (also can carry out in interpulse period), with season step frequency source with frequency difference at equal intervals order saltus step.Now, up
Prop up route baseband signal generator low intermediate frequency signal after frequency conversion and carry out gradually coherent, at upper turn of frequency with step frequency source signal
Forming transmitting pumping signal in device send transmitter amplification to wait at transmit-receive switch.Downlink reception branch road receive extraneous signal with
Step frequency source signal coherent in lower turn of frequency device forms 1 intermediate-freuqncy signal, then reduces signal frequency further through mixing amplification,
Obtaining video signal in video detection amplifier eventually, this signal chooses low level Frequency point for control automatically through com-parison and analysis circuit
Device processed carries out frequency management.The lowest interference level frequent point that self adaptation counter-measure controller provides according to com-parison and analysis circuit,
Automatically locking frequency optimum traffic, instruction transmit-receive switch is opened normal work, thus is completed adaptive frequency-selecting process.
In noise trap of the present utility model, core is mainly Self Adaptive Control and step-by-step movement frequency source.From
Output, incoming frequency are scanned by suitable solution part by computer manual intervention under disturbance state, by comparing, select
Automatic Frequency is also bound by frequency optimum traffic.Step-by-step movement frequency source typically uses Direct Digital Frequency Synthesizers (DDS), and it is excellent
Point is that response speed is fast, saves the frequency sweep time, to following the tracks of interference formation advantage in time domain.Step-by-step movement frequency source is typically in work
Tens the most hundreds of Frequency points are set in bandwidth, adaptive frequency Management Controller instruct under, with delicate level interval by
One jump frequency, the frequency source signal of each Frequency point exists with extraneous signal (can be that echo-signal is also likely to be interference signal)
Turning mixing in frequency device up and down and form fixed intermediate frequency, super-heterodyne device frequency source frequency is higher than extraneous signal frequency, super interpolation equipment
The most contrary.Intermediate-freuqncy signal is amplified through rear class, conversion forms video signal, and a part send controller to make Amplitude Ratio relatively, at numerous frequencies
Rate point reclaims in signal, and controller selects Frequency point that signal level is minimum as operating frequency, and quickly enters sending and receiving frequency
Solidification ordered by luggage, and effectively avoid interference frequency signal, and restorer normally works.Move with reception two system synchronization owing to launching
Make, the accuracy of frequency and ageing the highest, it is achieved the effect of agile.
The vitals of the present invention is Market goods shelf product, installs additional, reequips or original design is convenient and easy.Existing wireless
The frequency source of electricity localizer is mostly DDS standard, has the function that can quickly change frequency.The step-length of frequency step can be to appoint
Meaning value, key condition be transmitting-receiving must be same frequency source, be full coherent system, to guarantee the homogeneity of phase parameter.One
As the equipment of KMHz frequencies above use step-length at about 5MHz, this is to be not more than this value owing to constituting the effective bandwidth of signal.
Control the available single-chip microcomputer of part to complete, also can install additional in original equipment control part and control software and the corresponding controlled portion of extension set
Part.
For operating frequency point, no matter there are how many some positions, all use computer addressing mode to have access to, terminate in frequency sweep
After, the best operating point of selection is pointed to rapidly according to geocoding by computer, quickly binds solidification.It is soft that computer controls programming
Part may insure that searches for and points to purpose Frequency point rapidly and accurately.
The feature of adaptive frequency management is that response speed is fast, typically can complete in the delicate level time period, and two is that frequency is anti-
Should be accurate, transmitting-receiving synchronize and be same coherent source, will not occurrence frequency and phase error, be that radio location device counter-measure is fast
Speed sends out the best mode answered.
Noise trap provided by the utility model can apply this technology, also in any similar radio fixing aid(s)
This device can be installed in existing equipment additional, the usefulness of adaptive frequency management can be reached on the basis of original equipment.
Above example only illustrates rather than restriction, although be described in detail the present invention, this area
It will be appreciated by the skilled person that modifications of the present invention and equivalent replacement, without departing from the spirit and scope of the present invention, it all should
Contain within scope of the presently claimed invention.
Claims (5)
1. a frequency self adaptation noise trap, it is characterised in that: include controller, transmit-receive switch, step-by-step movement frequency source, send out
Penetrate branch road and receiving branch, com-parison and analysis circuit, wherein can send counter-measure frequency tube when described controller detects interference
Reason instruction, described transmit-receive switch will cut out transmitting branch, described step-by-step movement after receiving the instruction of described counter-measure frequency management
Frequency source performs stepping amplitude as fixed frequency with Microsecond grade time interval after receiving the instruction of described counter-measure frequency management
Jump frequency action, described transmitting branch and receiving branch synchronously perform identical jump frequency action, and antenna receives
Extraneous signal after described transmit-receive switch, be input to described receiving branch, received signal is carried out by described receiving branch
Forming video signal after process, the level of described video signal is compared by described com-parison and analysis circuit for each Frequency point
Relatively, selected Frequency point is sent to stepping as operating frequency, described controller by the Frequency point selecting signal amplitude minimum
Formula frequency source, instructs described step-by-step movement frequency source stopping frequency sweep and is placed in described Frequency point, instruct described transmit-receive switch simultaneously and beat
Open described transmission channel, so far complete the adaptive management process of frequency.
Frequency self adaptation noise trap the most according to claim 1, it is characterised in that: described transmitting branch includes base band
Signal generator, frequency mixer, upper turn of frequency device, the output of wherein said baseband signal generator is connected to described frequency mixer, described
The output of frequency mixer is connected to the described upper frequency device that turns, and is transmitted into by transmitter after the signal of the described upper output turning frequency device is filtered
Described transmit-receive switch.
Frequency self adaptation noise trap the most according to claim 1, it is characterised in that: described receiving branch includes low noise
Acoustic amplifier, lower turn of frequency device, wave filter, intermediate frequency amplifier 1, frequency mixer, intermediate frequency amplifier 2 and video detection amplifier, described
Low-noise amplifier receives the signal from described transmit-receive switch, and the output of described low-noise amplifier is connected to described filtering
Device, the output of described wave filter is connected to described intermediate frequency amplifier 1, and the output of described intermediate frequency amplifier 1 is connected to described mixing
Device, the output of described frequency mixer is connected to described intermediate frequency amplifier 2, and the output of described intermediate frequency amplifier 2 is connected to described video
Detector amplifier, the output of described video detection amplifier is connected to described com-parison and analysis circuit.
Frequency self adaptation noise trap the most according to claim 1, it is characterised in that: described step-by-step movement frequency source is straight
Connect digital frequency synthesizer.
Frequency self adaptation noise trap the most according to claim 1, it is characterised in that: described step-by-step movement frequency source is connecing
The stepping amplitude performing jump frequency action after receiving the instruction of described counter-measure frequency management is 5MHz.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620519937.4U CN205787100U (en) | 2016-06-01 | 2016-06-01 | A kind of frequency self adaptation noise trap |
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| CN201620519937.4U CN205787100U (en) | 2016-06-01 | 2016-06-01 | A kind of frequency self adaptation noise trap |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108011646A (en) * | 2017-12-18 | 2018-05-08 | 南京新频点电子科技有限公司 | A kind of frequency adaptively suppresses countermeasure set |
| CN110632564A (en) * | 2019-10-25 | 2019-12-31 | 深圳迈睿智能科技有限公司 | Environment self-adaptive microwave detector and self-adaptive method |
| CN112217578A (en) * | 2019-07-12 | 2021-01-12 | 北京地平线机器人技术研发有限公司 | Frequency adjustment method, device, equipment and readable computer storage medium |
-
2016
- 2016-06-01 CN CN201620519937.4U patent/CN205787100U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108011646A (en) * | 2017-12-18 | 2018-05-08 | 南京新频点电子科技有限公司 | A kind of frequency adaptively suppresses countermeasure set |
| CN108011646B (en) * | 2017-12-18 | 2023-09-19 | 南京新频点电子科技有限公司 | Frequency self-adaptive interference suppression device |
| CN112217578A (en) * | 2019-07-12 | 2021-01-12 | 北京地平线机器人技术研发有限公司 | Frequency adjustment method, device, equipment and readable computer storage medium |
| CN112217578B (en) * | 2019-07-12 | 2022-10-21 | 北京地平线机器人技术研发有限公司 | Frequency adjustment method, device, equipment and readable computer storage medium |
| CN110632564A (en) * | 2019-10-25 | 2019-12-31 | 深圳迈睿智能科技有限公司 | Environment self-adaptive microwave detector and self-adaptive method |
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