CN106911400A - Intermodulation processing unit and intermodulation processing method - Google Patents
Intermodulation processing unit and intermodulation processing method Download PDFInfo
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- CN106911400A CN106911400A CN201710069683.XA CN201710069683A CN106911400A CN 106911400 A CN106911400 A CN 106911400A CN 201710069683 A CN201710069683 A CN 201710069683A CN 106911400 A CN106911400 A CN 106911400A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
- H04B17/3913—Predictive models, e.g. based on neural network models
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- Quality & Reliability (AREA)
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- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention provides intermodulation processing unit and intermodulation processing method, described device includes signal source, the first signal and secondary signal for producing different frequency range；Power amplifier；Combiner：Combining signal will be exported to equipment under test after for the first signal and secondary signal combining that are input into will to be amplified；Shunt：For receiving inter-modulated signal, and the intermodulation product of odd-order and even-order is isolated from the inter-modulated signal；Judge module, for judging whether intermodulation product can interfere to normal device；Damper, for cutting down the intermodulation product that can be interfered to normal device.The present invention is by compartment system Joint construction and sharing multisystem multiband wireless signal combining scene in power amplifier, low mutual tunable combiner simulating chamber, the odd-order of different frequency range multi signal mixing intermodulation generation and the product of even-order can be detected, and by setting the judgment mode of intermodulation product and setting damper, reduce the harm of intermodulation product.
Description
Technical field
The present invention relates to radio art, and in particular to intermodulation processing unit and intermodulation processing method.
Background technology
In a communications system, when the nonlinear device of two or more signal access arrangements, system can be produced
Intermodulation product, when these products fall into the receiver communication band of work nearby, can form parasitic disturbances.
Intermodulation Interference is not only caused harm to other systems, and harm is will also result in its own system, substantially there is following several
Situation：
1st, the harm to itself
After system debug is good, its working frequency stabilization, but due to the nonlinear device such as amplifier operating disorders, operation
Environment is not good, causes system disorders and equipment fault to take place frequently, and reduces the pot life of equipment.
2nd, reduction system overlay area
When the systems are operating normally, the power of system transmitter is to determine, and is launched in the bandwidth for specifying, but by
In the presence of other intermodulation frequencies, these frequency signals can also be launched by transmitter apparatus, and the output of these frequencies is not
But other business are caused harm, while portion of energy is also occupied, according to law of conservation of energy, then what basic frequency was launched has
Effect power is reduced certainly, causes the overlay area of system to reduce.
3rd, dominant frequency frequency spectrum variation
It is overlapped in receiver inlet with dominant frequency signal after Intermodulation Interference transmitting, causes the signal spectrum for receiving to send out
To there is serious phase jitter in raw distortion, the data for demodulating, receiver is produced error code, reduce the sensitivity of system.
4th, electric wave order is disturbed
Intermodulation product is sent when system works by the antenna-feedback system of emitter, and these are disorderly and unsystematic, rugged
Radiofrequency signal has raised radio background noise, is degrading electromagnetic environment, increased the probability of interference with built system signal, draws
Space wave order is played disorderly.
Different according to the device type that interference is produced, Intermodulation Interference is divided into transismitter intermodulation interference and receiver intermodulation is dry
Disturb.Wherein transmitter intermodulation refers to mutual in transmitting end with this signal channel launched due to being coupled to other signals of this channel
The combination of frequency for acting on and producing, the interference for causing is launched in company with this signal channel launched together；Receiver intermodulation is two
After individual or more than two radio signals are received by receiver, due to the non-thread of receiver medium-high frequency amplifier and frequency mixer etc.
Property, intermodulation product is produced, falling to formed within the scope of frequency acceptance band interference, and the prediction of the power level of intermodulation product is mainly used
Power series method, Volterra Series Methods and IM Mircoscope methods set up forecast model, and intermodulation product level is predicted.
But, the above method has its adaptation field and limitation, and accommodation is narrow, and operability is not strong.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides intermodulation processing unit and intermodulation processing method.
The present invention is realized with following technical scheme：
Intermodulation processing unit, including：
Signal source, the first signal and secondary signal for producing different frequency range；
Power amplifier：For the first signal and secondary signal to be carried out into power amplification respectively；
Combiner：Combining signal is exported after for power amplifier to be amplified into the first signal and secondary signal combining that are input into
To equipment under test；
Shunt：For receiving inter-modulated signal, and the intermodulation of odd-order and even-order is isolated from the inter-modulated signal
Product；The inter-modulated signal is that the combining signal that equipment under test is input into according to combiner is produced；
Judge module, for judging whether intermodulation product can interfere to normal device；
Damper, for cutting down the intermodulation product that can be interfered to normal device.
Further, different frequency range signal source is additionally operable to produce the 3rd signal of different frequency range；
Power amplifier：It is additionally operable to for the 3rd signal to carry out power amplification；
Combiner：Being additionally operable to will be defeated after the first signal, secondary signal, the 3rd signal combining of power amplifier amplification input
Go out combining signal to equipment under test；
Shunt：It is additionally operable to receive the combining letter that the first signal, secondary signal, the 3rd signal amplify and exported after combining
Number, and the intermodulation product of odd-order and even-order is isolated from the inter-modulated signal.
Further, whether the judge module is by judging desired signal level to the ratio of interference signal level pre-
If within the scope of judge whether intermodulation product can interfere to normal device.
Further, also include：
Transmitter intermodulation amplitude evaluation module, for being commented using free space propagation model or village-Hart propagation model difficult to understand
Estimate the intermodulation product amplitude of receiver inlet.
Further, also include：
Receiver intermodulation amplitude evaluation module, for use intercept point methods assessment external transmitter signal in receiver
The interference that portion produces.
A kind of intermodulation processing method, the intermodulation processing method is included using above-mentioned intermodulation processing unit, methods described：
Produce first signal and secondary signal of different frequency range；
First signal and secondary signal are carried out into power amplification respectively；
Combining signal is exported to equipment under test after power amplifier to be amplified the first signal and secondary signal combining being input into；
Inter-modulated signal is received, and the intermodulation product of odd-order and even-order is isolated from the inter-modulated signal；It is described mutual
It is that the combining signal that equipment under test is input into according to combiner is produced to adjust signal；
Judge whether intermodulation product can interfere to normal device；
The intermodulation product that abatement can be interfered to normal device.
Further, also include：
Produce the 3rd signal of different frequency range；
3rd signal is carried out into power amplification；
Will power amplifier amplify input the first signal, secondary signal, the 3rd signal combining after export combining signal to
Equipment under test；
The combining signal that the first signal, secondary signal, the 3rd signal amplify and exported after combining is received, and from the intermodulation
The intermodulation product of odd-order and even-order is isolated in signal.
Further, also include：
Judge desired signal level to the ratio of interference signal level whether within preset range；
If so, then judging that intermodulation product can be interfered to normal device.
Further, also include：
The intermodulation product width of receiver inlet is assessed using free space propagation model or village-Hart propagation model difficult to understand
Degree.
Further, also include：
Using intercept point methods, the assessment of intermodulation product is carried out.
The beneficial effects of the invention are as follows：
The invention provides intermodulation processing unit and intermodulation processing method, the present invention passes through power amplifier, low mutual blending
Road device simulation indoor distributed system Joint construction and sharing multisystem multiband wireless signal combining scene, can detect letter more than different frequency range
Number mixing intermodulation produce odd-order and even-order product, and by set intermodulation product judgment mode and set cut down
Device, reduces the harm of intermodulation product.
Brief description of the drawings
Fig. 1 is the intermodulation processing unit schematic diagram of invention.
Fig. 2 is intermodulation process flow figure of the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with accompanying drawing
Step ground is described in detail.
Intermodulation processing unit, as shown in figure 1, including：
Signal source, the first signal and secondary signal for producing different frequency range；
Power amplifier：For the first signal and secondary signal to be carried out into power amplification respectively；
Combiner：Combining signal is exported after for power amplifier to be amplified into the first signal and secondary signal combining that are input into
To equipment under test；
Shunt：For receiving inter-modulated signal, and the intermodulation of odd-order and even-order is isolated from the inter-modulated signal
Product；The inter-modulated signal is that the combining signal that equipment under test is input into according to combiner is produced；
Judge module, for judging whether intermodulation product can interfere to normal device；
Damper, for cutting down the intermodulation product that can be interfered to normal device.
Further, different frequency range signal source is additionally operable to produce the 3rd signal of different frequency range；
Power amplifier：It is additionally operable to for the 3rd signal to carry out power amplification；
Combiner：Being additionally operable to will be defeated after the first signal, secondary signal, the 3rd signal combining of power amplifier amplification input
Go out combining signal to equipment under test；
Shunt：It is additionally operable to receive the combining letter that the first signal, secondary signal, the 3rd signal amplify and exported after combining
Number, and the intermodulation product of odd-order and even-order is isolated from the inter-modulated signal.
Specifically, whether the judge module is by judging desired signal level to the ratio of interference signal level default
Within the scope of judge whether intermodulation product can interfere to normal device.
Specifically, also include：
Transmitter intermodulation amplitude evaluation module, for being commented using free space propagation model or village-Hart propagation model difficult to understand
Estimate the intermodulation product amplitude of receiver inlet.Transmitter intermodulation product is launched by the antenna-feedback system of system, by nothing
Line transmission eventually arrives at receiver inlet, using free space propagation model or village difficult to understand-Hart propagation model assessment receiver
The intermodulation product amplitude of input.
Specifically, also include：
Receiver intermodulation amplitude evaluation module, for use intercept point methods assessment external transmitter signal in receiver
The interference that portion produces.Receiver intermodulation product is to assess the interference that external transmitter signal is produced inside receiver, so closing
How key point assesses the equivalent inpnt level of receiver and the amplitude leyel of intermodulation product.Simplest method is to utilize receiver
I P i and I M i parameters are provided in specification, intercept point methods are used according to being provided in spectrum monitoring handbook, carry out intermodulation product
Assessment.
The embodiment of the present invention additionally provides a kind of intermodulation processing method, and the intermodulation processing method is mutually mediated using above-mentioned
Reason device, as shown in Fig. 2 methods described includes：
S1. first signal and secondary signal of different frequency range are produced；
S2. the first signal and secondary signal are carried out into power amplification respectively；
S3. combining signal will be exported after the first signal of power amplifier amplification input and secondary signal combining to be set to tested
It is standby；
S4. inter-modulated signal is received, and the intermodulation product of odd-order and even-order is isolated from the inter-modulated signal；It is described
Inter-modulated signal is that the combining signal that equipment under test is input into according to combiner is produced；
S5. judge whether intermodulation product can interfere to normal device；
S6. the intermodulation product that abatement can be interfered to normal device.
Further, also include：
Produce the 3rd signal of different frequency range；
3rd signal is carried out into power amplification；
Will power amplifier amplify input the first signal, secondary signal, the 3rd signal combining after export combining signal to
Equipment under test；
The combining signal that the first signal, secondary signal, the 3rd signal amplify and exported after combining is received, and from the intermodulation
The intermodulation product of odd-order and even-order is isolated in signal.
Further, also include：
Judge desired signal level to the ratio of interference signal level whether within preset range；
If so, then judging that intermodulation product can be interfered to normal device.
Specifically, protected than (desired signal level is to interference with the radio-frequency channel for wishing signal according to intermodulation product amplitude
The ratio of signal level) should further determine whether to interfere the equipment of normal work in the range of 8 ± 3dB.
Further, also include：
The intermodulation product width of receiver inlet is assessed using free space propagation model or village-Hart propagation model difficult to understand
Degree.
Further, also include：
Produced inside receiver using intercept point methods assessment external transmitter signal according to being provided in spectrum monitoring handbook
Raw interference.
Specifically step is：
Appraisal procedure is：The incoming level of each incoming frequency of receiver is calculated first with free space propagation model；
Secondly using the equivalent inpnt level for assessing receiver；Finally combine IPi and IMi the assessment intermodulation product width of receiver device
Degree.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. intermodulation processing unit, it is characterised in that including：
Signal source, the first signal and secondary signal for producing different frequency range；
Power amplifier：For the first signal and secondary signal to be carried out into power amplification respectively；
Combiner：Combining signal is exported to quilt after for power amplifier to be amplified into the first signal and secondary signal combining that are input into
Measurement equipment；
Shunt：For receiving inter-modulated signal, and the intermodulation product of odd-order and even-order is isolated from the inter-modulated signal；
The inter-modulated signal is that the combining signal that equipment under test is input into according to combiner is produced；
Judge module, for judging whether intermodulation product can interfere to normal device；
Damper, for cutting down the intermodulation product that can be interfered to normal device.
2. device according to claim 1, it is characterised in that：
Signal source is additionally operable to produce the 3rd signal of different frequency range；
Power amplifier：It is additionally operable to for the 3rd signal to carry out power amplification；
Combiner：It is additionally operable to export conjunction after power amplifier is amplified into the first signal, secondary signal, the 3rd signal combining being input into
Road signal is to equipment under test；
Shunt：It is additionally operable to receive the combining signal that the first signal, secondary signal, the 3rd signal amplify and exported after combining, and
The intermodulation product of odd-order and even-order is isolated from the inter-modulated signal.
3. device according to claim 1, it is characterised in that the judge module is by judging desired signal level to dry
Whether the ratio for disturbing signal level judges whether intermodulation product can interfere to normal device within preset range.
4. device according to claim 1, it is characterised in that also include：
Transmitter intermodulation amplitude evaluation module, for being connect using free space propagation model or village difficult to understand-Hart propagation model assessment
The intermodulation product amplitude of receipts machine input.
5. the device according to claim 1, it is characterised in that also include：
Receiver intermodulation amplitude evaluation module, for being produced inside receiver using intercept point methods assessment external transmitter signal
Raw interference.
6. a kind of intermodulation processing method, the intermodulation processing unit described in the intermodulation processing method usage right requirement 1, it is special
Levy and be, methods described includes：
Produce first signal and secondary signal of different frequency range；
First signal and secondary signal are carried out into power amplification respectively；
Combining signal is exported to equipment under test after power amplifier to be amplified the first signal and secondary signal combining being input into；
Inter-modulated signal is received, and the intermodulation product of odd-order and even-order is isolated from the inter-modulated signal；The intermodulation letter
Number it is that the combining signal that equipment under test is input into according to combiner is produced；
Judge whether intermodulation product can interfere to normal device；
The intermodulation product that abatement can be interfered to normal device.
7. method according to claim 6, it is characterised in that also include：
Produce the 3rd signal of different frequency range；
3rd signal is carried out into power amplification；
Combining signal is exported after the first signal, secondary signal, the 3rd signal combining that power amplifier is amplified input to tested
Equipment；
The combining signal that the first signal, secondary signal, the 3rd signal amplify and exported after combining is received, and from the inter-modulated signal
In isolate the intermodulation product of odd-order and even-order.
8. method according to claim 6, it is characterised in that：Also include：
Judge desired signal level to the ratio of interference signal level whether within preset range；
If so, then judging that intermodulation product can be interfered to normal device.
9. method according to claim 6, it is characterised in that：Also include：
The intermodulation product amplitude of receiver inlet is assessed using free space propagation model or village-Hart propagation model difficult to understand.
10. method according to claim 6, it is characterised in that：Also include：
Using intercept point methods, the assessment of intermodulation product is carried out.
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| CN201710069683.XA CN106911400B (en) | 2017-02-08 | 2017-02-08 | Intermodulation processing device and intermodulation processing method |
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| CN201710069683.XA CN106911400B (en) | 2017-02-08 | 2017-02-08 | Intermodulation processing device and intermodulation processing method |
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2017
- 2017-02-08 CN CN201710069683.XA patent/CN106911400B/en active Active
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| US20130202020A1 (en) * | 2011-02-09 | 2013-08-08 | Agilent Technologies, Inc | Method of generating interference signals and device to carry out such a method |
| CN102752241A (en) * | 2011-04-22 | 2012-10-24 | 华为技术有限公司 | Method, device and system for detecting quality of channel |
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