CN108777585A - The device and method of passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system - Google Patents
The device and method of passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system Download PDFInfo
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- CN108777585A CN108777585A CN201810134215.0A CN201810134215A CN108777585A CN 108777585 A CN108777585 A CN 108777585A CN 201810134215 A CN201810134215 A CN 201810134215A CN 108777585 A CN108777585 A CN 108777585A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
- H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The present invention relates to a kind of device and methods of passive intermodulation signal in adaptive cancellation wireless transceiver system, it offsets the component for receiving frequency range is dropped into the passive intermodulation signal of wireless transceiver system generation, including multigroup coupler, Canceller circuit, emit signal frequency detecting circuit, offset detection circuit, digital processing control unit；It is serially connected between wireless transmitting-receiving equipments and antenna, and three road signals are separated through the coupling of multigroup coupler：First via signal generates the signal for offsetting passive intermodulation through Canceller circuit, and is realized and offset by Signal averaging；The emitted signal frequency detecting circuit of second road signal and digital processing control unit calculate passive intermodulation signal frequency；Third road signal detects passive intermodulation signal cancellation result through offsetting detection circuit and digital processing control unit, and the above-mentioned Canceller circuit amplitude of real-time monitoring and phase make passive intermodulation signal cancellation result meet preset value；The present invention can be mounted on outside wireless transmitting-receiving equipments or in wireless transmitting-receiving equipments.
Description
Technical field
The present invention relates to wireless communication fields.Specifically, the present invention relates to one kind for wireless transceiver system it is passive mutually
Adjust the numerical control canceller of signal.
Background technology
In communicating antenna-feeder system, wireless transmitting-receiving equipments are widely applied.Wireless transmitting-receiving equipments itself include that generation is passive
Device of inter-modulated signal, such as radio frequency passive device, filter, combiner etc.；From wireless transmitting-receiving equipments antenna opening to antenna
Chain road also includes much to generate the devices of passive intermodulation signals, for example coupler, radio-frequency cable, tower are put.For wirelessly receiving
For hair system, how to inhibit to be generated by emitting the receiver caused by signal to wireless transmitting-receiving equipments in wireless transceiver system
Intermodulation Interference, be always the critical issue of such system.It is therefore desirable to wireless transmitting-receiving equipments are at work, transmission channel production
Raw passive intermodulation signal level is as low as possible, in order to avoid passive intermodulation signal falls into receiving channel, intermodulation is caused to receiving channel
Interference.Generally there are two types of modes for current passive intermodulation cancellation technology：
Documents CN100490307C discloses a kind of entitled：" signal processing circuit, base station and elimination intermodulation production
The primary carrier of unbalanced input unit is divided into two-way by the method for object " patent of invention, the patent, inputs two branches respectively, the
Primary carrier passes through the processing signal that non-linear unit generation includes first group of intermodulation product all the way, and the second road primary carrier passes through
Splitter, frequency multiplier, mixer and adjusting circuit.The control signal containing second group of high order intermodulation product is generated, finally will
Two paths of signals is superimposed.It is identical as the frequency of first group of intermodulation product using second group of high order intermodulation, and amplitude is close to identical, phase
Position is on the contrary, offset inter-modulated signal.
The technical solution is in following deficiency：1, the technical solution is not suitable for passive device, it does not account for non-linear unit
The intermodulation value difference of internal different location is different, and for passive device, this species diversity is it will be apparent that in passive circuit, and transmission is believed
Number amplitude fading and phase change degree it is very big.In the case where multiple positions generate intermodulation, circuit front-end generates mutual
Adjust signal that can significantly decay in signals transmission, the inter-modulated signal of circuit output contains only the mutual of circuit end generation
Signal is adjusted, therefore, for passive device, if from the front end number of winning the confidence of non-linear unit, generated intermodulation offseting signal
It can not be offseted with the inter-modulated signal of antenna port；2, the intermodulation offseting signal i.e. second group high order that the technical solution generates is mutual
Product is adjusted, fixed order is defined as and obtains intermodulation product, the inter-modulated signal of the non-linear unit in corresponding frequency band can only be eliminated,
There are limitations.
Documents 201310048951.1 disclose a kind of entitled：" dress is offset in a kind of intermodulation for passive device
Set " patent of invention, which passes through from the transmitting signal that passive device output end direct-coupling includes high order intermodulation product
After the adjustment of passive regulator is transmitted to the radio frequency link end reflection with inter-modulated signal generator, again by passive tune
The adjustment of device is saved, the counteracting with the inter-modulated signal identical frequency, level and opposite phase of aforesaid passive device transmitting signal is obtained
Signal, the signal emit Signal averaging by coupler and Passive Nonlinear unit output end, realize that intermodulation is offset.
The technical solution is in following deficiency：1, the technical solution uses passive regulator, and amplitude adjusted, phase adjusted are equal
It is passive device, if to realize that amplitude adjusted, phase adjusted are needed by outer power drive passive regulator, for example uses electricity
Machine drives, or directly manually drives, these modes can so that practical application is of high cost, and be not easy to commercialization；2, due to
There is no the feedback sense circuit of passive intermodulation offset result, offset result that cannot monitor in real time and adjust.
In addition to this, existing other methods for reducing passive intermodulation signal level are concentrated mainly in structure and technique,
These methods generally require to increase additional cost, and the electroplating technology for thickening the coat of metal often increases pollution.
Invention content
An object of the present invention is to provide a kind of digital adaptation to overcome the shortcomings of above-mentioned background technology, is used
The intermodulation offset device of passive device in wireless transceiver system.It can will be being generated in wireless transmitting-receiving equipments and wireless
The passive intermodulation signal that receiving and transmitting mouth is generated to this section of chain road other equipment of antenna or component drops into reception frequency
The component of section is offset.
To achieve the above object, the present invention adopts the following technical scheme that：The invention discloses a kind of adaptive cancellation is wireless
The device of passive intermodulation signal in receive-transmit system, it includes multigroup coupler, Canceller circuit, transmitting signal frequency detecting circuit, nothing
Detection circuit and digital processing control unit are offset in source intermodulation；The a port and wireless transmitting-receiving equipments of multigroup coupler
Antenna opening connection, another port connect with antenna；Multigroup coupler is from the antenna opening of wireless transmitting-receiving equipments to antenna
This section of chain road is coupled out radiofrequency signal, and three tunnels of the radiofrequency signal point are exported respectively to Canceller circuit, transmitting signal mirror
Frequency circuit, passive intermodulation offset detection circuit；The radiofrequency signal includes transmitting signal, passive intermodulation signal and receives signal；
Export to the Canceller circuit the amplitude modulated phase converter of radiofrequency signal and inter-modulated signal generator processing after produce with it is described
Passive intermodulation signal frequency in radiofrequency signal is identical, the different first intermodulation offseting signals different with phase of amplitude；This first
Intermodulation offseting signal is after the Canceller circuit end reflection, again by the processing of amplitude modulation and phase modulation device, and couples output
To multigroup coupler, form that, amplitude identical as the passive intermodulation signal frequency in the radiofrequency signal be identical and opposite in phase
Second intermodulation offseting signal, the second intermodulation offseting signal are offset with the passive intermodulation signal in the radiofrequency signal, are supported
Passive intermodulation signal after disappearing is less than or equal to passive intermodulation preset value；The adjustment of the amplitude modulation and phase modulation device passes through digital processing control
Amplitude, the phase controlling parameter of unitary operation output processed are realized；Passive device generates passive intermodulation in the wireless transmitting-receiving equipments
It gradually changes at any time, the preset value curve for the passive intermodulation will be set in the present apparatus changing over time；The transmitting signal
Frequency-discriminating circuit is used to the radiofrequency signal that coupling comes being converted into digital signal, and the digital signal is input to digital processing control
Unit processed is analyzed and is calculated, and obtains the specific transmitting signal frequency point of known transmitting signal working frequency range, and then is obtained wireless
The passive intermodulation of transceiver drops into the value of frequency point for receiving frequency range component, which will be converted into passive for handling
The digital filter parameters of intermodulation sampled signal；The passive intermodulation offsets detection circuit and is used to set to coupling the wireless receiving and dispatching come
Standby passive intermodulation signal drops into reception frequency range component and is converted into digital signal and is input to digital processing control unit, into
Line number word is filtered and calculates, and realizes the amplitude detection that the component for receiving frequency range is dropped into passive intermodulation signal；The number
Word processing control unit obtains passive intermodulation preset value by man-machine interface first, then by the inspection of the passive intermodulation signal
Amplitude is surveyed to be compared with passive intermodulation preset value；When the detected amplitude is less than or equal to the preset value, the Canceller
Circuit does not generate intermodulation offseting signal, is not had an impact to the passive intermodulation index of wireless transmitting-receiving equipments；When the detected amplitude
When more than the preset value, the Canceller circuit is produced passive with wireless transmitting-receiving equipments by the adjustment of amplitude and phase
Passive intermodulation during inter-modulated signal frequency is identical, amplitude is identical and the intermodulation offseting signal of opposite in phase and the radiofrequency signal
Signal is offset.
The present invention a kind of preferred embodiment in, multigroup coupler by strip line cable, offset coupler,
Frequency discrimination coupler, detection coupler and feed circuit are constituted；In the first port and wireless transmitting-receiving equipments of multigroup coupler
Cable connection of the antenna opening length of passive device in 0 to 1 meter of range；The counteracting coupler is from wireless transmitting-receiving equipments day
Chain road after line mouth is coupled out radiofrequency signal and is output to Canceller circuit, offsets the degree of coupling of coupler ranging from
25dB to 45dB；The frequency discrimination coupler is coupled out radiofrequency signal and defeated from the chain road after wireless transmitting-receiving equipments antenna opening
Go out to transmitting signal frequency detecting circuit, the degree of coupling ranging from 30dB to the 50dB of frequency discrimination coupler；The detection coupler is from wireless
Chain road after receiving and transmitting mouth, which is coupled out radiofrequency signal and is output to passive intermodulation, offsets detection circuit, detects coupling
The degree of coupling of clutch ranging from 25dB to 35dB；Isolation range between three coupling delivery outlets is 70dB or more；It is described more
The passive intermodulation value that group coupler itself generates is less than predetermined value；The passive intermodulation value that multigroup coupler itself generates with
The characteristic curve of time change is obtained by testing；Strip line cable in multigroup coupler is including but not limited to coaxial
Cable, microstrip line, strip line, same to shaft.
In a kind of preferred embodiment of the present invention, coupler is offset from the chain after wireless transmitting-receiving equipments antenna opening
Only transmitting signal can generate on the inter-modulated signal generator and be used for passive intermodulation in the radiofrequency signal that road is coupled out
The intermodulation offseting signal of counteracting, reception signal and passive intermodulation signal in the radiofrequency signal will not be in the inter-modulated signals
The effect is generated on generator；Emit the inter-modulated signal that signal generates on inter-modulated signal generator in the radiofrequency signal
Frequency is identical as the passive intermodulation signal frequency in the radiofrequency signal, but the range value of the inter-modulated signal is more than or equal to described
Passive intermodulation signal amplitude value in radiofrequency signal and offset the coupler degree of coupling and value；The inter-modulated signal generator production
The characteristic curve that raw inter-modulated signal changes over time is obtained by testing.
In a kind of preferred embodiment of the present invention, the Canceller circuit is directly connect with counteracting coupler, or
It is connect by RF switch with coupler is offset.
In a kind of preferred embodiment of the present invention, amplitude modulation and phase modulation device one end connection in the Canceller circuit is supported
Disappear coupler, and the other end connects inter-modulated signal generator, and the amplitude modulation and phase modulation device includes modulation circuit and phase modulation circuit；Or
Amplitude modulation and phase modulation device one end in the Canceller circuit is connect by the first circulator with coupler is offset, and the other end passes through the
Two circulators are connect with inter-modulated signal generator, and the amplitude modulation and phase modulation device only includes modulation circuit.
In a kind of preferred embodiment of the present invention, inter-modulated signal generator generates mutual in the Canceller circuit
It adjusts signal to offset coupler by amplitude modulation and phase modulation device by reflection, is coupled back into strip line cable and forms passive intermodulation counteracting letter
Number, it is offset with the passive intermodulation signal generated in wireless transmitting-receiving equipments；Or by the second circulator, amplitude modulation and phase modulation device,
First circulator, offsets coupler, and the passive intermodulation signal for being coupled to strip line cable and wireless transmitting-receiving equipments is offset.
In a kind of preferred embodiment of the present invention, the transmitting signal frequency detecting circuit includes the decaying being sequentially connected in series
Device, mixer, intermediate-frequency filter, digital controllable gain amplifier and analog-to-digital conversion device；The passband of the intermediate-frequency filter
Bandwidth is equal to transmitted bandwidth, and the mixer is made of frequency mixer and local oscillator.
In a kind of preferred embodiment of the present invention, the passive intermodulation is offset detection circuit and is filtered including the first radio frequency
Wave device, low-noise amplifier, the second radio-frequency filter, radio-frequency amplifier circuit, frequency mixer, local oscillator, intermediate-frequency filter, number
Controllable gain amplifier and analog-to-digital conversion device；The passband of both first radio-frequency filter and second radio-frequency filter
Be receive signal band, stopband be transmitting signal band；The pass band width of the intermediate-frequency filter is equal to reception bandwidth；
The passive intermodulation offsets in detection circuit and offsets detection circuit input port to passive intermodulation counteracting detection circuit from passive intermodulation
The yield value range of this section of link is between 80~120dB before middle analog-digital converter input port；Per level-one signal amplification circuit
It is isolated with metal cavitg.
The present invention a kind of preferred embodiment in, the digital processing control unit include programmable logic device,
Central processing unit and digital signal processor；It is that there are one between the digital processing control unit and Canceller circuit to connect
Amplitude, the controlled quentity controlled variable of phase are passed to amplitude modulation and phase modulation device in Canceller circuit by mouth；The digital processing control unit and transmitting
It is to carry out transmitting letter there are an interface to obtain the sampled signal of transmitting signal frequency detecting circuit between signal frequency detecting circuit
Number digital filtering and frequency identification and the frequency point for finally calculating passive intermodulation signal；The digital processing control unit with
It is that there are an interfaces between passive intermodulation counteracting detection circuit to obtain the sampling of passive intermodulation counteracting detection circuit to believe
Number, the digital filtering and amplitude for carrying out passive intermodulation signal calculate, and according to calculated range value to being adjusted in Canceller circuit
Control of the width phase converter into line amplitude, phase；The digital processing control unit man-machine interactive interface, effect include but not
It is limited to program download, configuration information input, remote alarm and maintenance；It includes transmitting signal wherein to need the configuration information inputted
Bandwidth and frequency range, receive signal bandwidth and frequency range, the order of dominant interference component in passive intermodulation signal and band information,
Passive intermodulation signal preset value and the curve changed over time, maximum counteracting number；The man-machine interactive interface can be with
Data interaction is carried out with internet backstage resource：Upload the passive intermodulation value in the equipment running process, passive intermodulation value with
The status information of each modular circuit in the experience curve and passive intermodulation signal adaptive canceller of time change；Or
The curve downloaded the passive intermodulation signal preset value after complex optimum and changed over time.
The invention also discloses it is a kind of include adaptive cancellation passive intermodulation signal device wireless transceiver system, packet
The antenna feeder link for including wireless transmitting-receiving equipments and being installed on outside wireless transmitting-receiving equipments, antenna feeder chain road are provided with adaptive cancellation
Each antenna opening of the device of passive intermodulation signal in wireless transceiver system, the wireless transmitting-receiving equipments passes through 0~1 meter of cable
It is connected with the device, the passive intermodulation signal and nothing that the corresponding passive device of each antenna opening of wireless transmitting-receiving equipments is generated
The passive intermodulation signal that any one equipment or component generate in link after line receiving and transmitting mouth drops into reception frequency range
Component offset, reach passive intermodulation pre-set level；Cable specific length in 0 to 1 meter of range is offset best by passive intermodulation
Effect determines；The equipment or component of every antenna feeder link are including but not limited to cable, connector, tower amplifier, combining
Device, antenna.
In a kind of preferred embodiment of the present invention, when in antenna feeder link including more radio frequency system combiners, this dress
The antenna opening that can also install more radio frequency system combiners by 0~1 meter of cable is set to this section of link between antenna, is incited somebody to action
After the passive intermodulation signal of more radio frequency system combiner antenna openings generations and more radio frequency system combiner antenna openings in link
The passive intermodulation signal that any one equipment or component generate drops into the component counteracting for receiving frequency range, and it is pre- to reach passive intermodulation
If index；Cable specific length in 0 to 1 meter of range is offset optimum efficiency by passive intermodulation and is determined.
The invention also discloses it is a kind of can adaptive cancellation passive intermodulation signal wireless transmitting-receiving equipments, the wireless receipts
Hair equipment is internally provided with the device of passive intermodulation signal in adaptive cancellation wireless transceiver system.
In a kind of preferred embodiment of the present invention, when the wireless transmitting-receiving equipments emission signal frequency frequency discrimination signal
Or when known emission signal frequency, the device of passive intermodulation signal is by counteracting coupling in the adaptive cancellation wireless transceiver system
Clutch, detection coupler, Canceller circuit, passive intermodulation offset detection circuit and digital processing control unit composition；It is described to support
The coupler that disappears is directly connected to passive device antenna opening in wireless transmitting-receiving equipments；The detection coupler is set mounted on wireless receiving and dispatching
Standby radio frequency reception link；The passive intermodulation offsets detection circuit and includes low-noise amplifier, radio-frequency amplifier circuit, mixes
Frequency device, local oscillator, intermediate-frequency filter, digital controllable gain amplifier and analog-to-digital conversion device.
In a kind of preferred embodiment of the present invention, low-noise amplifier and penetrated when being provided in wireless transmitting-receiving equipments
When audio amplifier, the passive intermodulation offsets detection circuit and shares this low-noise amplifier with the wireless transmitting-receiving equipments and penetrate
Audio amplifier.
In a kind of preferred embodiment of the present invention, when being provided with digital processing control in the wireless transmitting-receiving equipments
When unit, the device of passive intermodulation signal and being total to for the wireless transmitting-receiving equipments in the adaptive cancellation wireless transceiver system
With a digital processing control unit.
The present invention a kind of preferred embodiment in, when wireless transceiver system including but not limited to wireless transmitting-receiving equipments,
It, can be by nothing when the multiple equipments such as tower amplifier, radio-frequency receiving-transmitting chain combiner, more radio frequency system combiners, antenna or component
It is that line transceiver generates and after wireless transmitting-receiving equipments antenna opening in link any one equipment or component generate it is passive
Intermodulation drops into the component counteracting for receiving frequency range, is obtained better than scheduled passive in the receives link in wireless transmitting-receiving equipments
Intermodulation requires the result of index；The wireless transmitting-receiving equipments include but not limited to wireless transmitting-receiving equipments, carry the base of transceiver
Station equipment, radio station apparatus.
The invention also discloses a kind of method of passive intermodulation signal in adaptive cancellation wireless transceiver system, this method
Include the following steps, 1, transmitting signal frequency discrimination and calculating passive intermodulation digital filter parameters；2, the calculated nothing of step 1 is utilized
Intermodulation digital filter parameters in source seek passive intermodulation signal amplitude value；3, the calculated passive intermodulation signal amplitude of step 2 is utilized
Value judges whether to need to carry out that inter-modulated signal is offset for no reason at all and the counteracting when needing to offset is handled；It is transported according to above-mentioned steps
During work, forms and a kind of realizing transmitting signal frequency discrimination and calculate the methods of passive intermodulation digital filter parameters, a kind of realization
Method and a kind of inspection of passive intermodulation signal for judging whether to enter passive intermodulation counteracting working condition according to passive intermodulation detected value
Survey and offset the method that controlled quentity controlled variable calculates.
In a kind of preferred embodiment of the present invention, the transmitting signal frequency discrimination and calculating passive intermodulation number filter
The method of wave parameter includes the following steps, SC1：Transmitted signal bandwidth is inputted by the man-machine interface of digital processing control unit E
Order with the dominant interference component in frequency range, reception signal bandwidth and frequency range, passive intermodulation signal and band information, expectation
Passive intermodulation preset value and the curve, amplitude and the phase that change over time initial experience data, maximum offset number
Deng, and be converted into configuring parameter accordingly；SC2：To the transmitting signal of frequency discrimination coupler coupling, transmitting signal frequency detecting circuit will
It is converted into digital signal and inputs digital processing control unit；SC3：Digital processing control unit is according to related in step SC1
The configuration parameter for emitting signal is filtered Screening Treatment to the sampled signal obtained by step SC2；SC4：It will be through step
SC3 treated data, calculate transmitting signal frequency point；SC5：By the calculated transmitting signal frequency point values of step SC4 with before
Primary calculated value of frequency point is compared, to judge whether current transmitting signal frequency point changes； SC6：If step
The judging result of SC5 is "Yes", then according to the result of calculation of SC4, utilizes three ranks, five ranks, seven rank passive intermodulation signals and transmitting
The relationship of signal obtains three ranks, five ranks, the frequency point of seven rank passive intermodulation signals；SC7：Digital processing control unit is according to step
In relation to the order configuration information of the frequency range configuration information and passive intermodulation interference signal that receive signal in SC1, matched by look-up table
Screening conditions are set, screening drops into the frequency point for receiving the passive intermodulation signal in frequency range band；SC8：By SC7 result of calculations, conversion
For passive intermodulation signal digital filter parameters and it is stored into parameter allocation list；And it updates and emits signal frequency in parameter allocation list
Point parameter；And return to step SC2；SC9：If the judging result of step SC5 is "No", before keeping in parameter allocation list
Passive intermodulation signal digital filter parameters and transmitting signal frequency point parameter；And return to step SC2.
In a kind of preferred embodiment of the present invention, the foundation passive intermodulation detected value judges whether to enter nothing
The method that working condition is offset in source intermodulation includes the following steps, S1：Hair is inputted by the man-machine interface of digital processing control unit
It penetrates signal bandwidth and frequency range, receive signal bandwidth and the order and frequency range of frequency range, dominant interference component in passive intermodulation signal
Initial experience data, the maximum of information, desired passive intermodulation preset value and the curve, amplitude and the phase that change over time
Number etc. is offset, and is converted into configuring parameter accordingly；S2：According to the configuration parameter in relation to emitting signal in step S1, number
Processing and control element (PCE) carries out operation to the sampled signal for emitting signal frequency detecting circuit, acquires the frequency point of passive intermodulation signal and turns
Respective digital filtering parameter is changed into be stored into parameter allocation list；S3：According to the configuration ginseng in relation to receiving signal in step S1
The digital filter parameters of number, the configuration parameter of passive intermodulation signal and the passive intermodulation signal by being obtained in step S2, number
The sampled signal that processing and control element (PCE) offsets passive intermodulation detection circuit carries out digital filtering, filters out except passive intermodulation signal
Other signal components in addition acquire the range value for dropping into the passive intermodulation signal for receiving frequency range； S4：Judge work at present
State；The status indicator default value of the working condition is：" do not enter passive intermodulation and offset operating mode "；If working shape
The status indicator value of state is " do not enter passive intermodulation and offset operating mode " then to continue following step, otherwise terminates this logic；
S5：The calculated passive intermodulation signal amplitude values of step S3 are compared with the passive intermodulation preset value in step S1 to sentence
The passive intermodulation preset value whether disconnected passive intermodulation signal amplitude is less than or equal to；S6：If the judging result of step S5 is
"Yes", then Canceller circuit continue keep inter-modulated signal generator and offset coupler between link high-isolation state；And it returns
Return step S2；S7：If the judging result of step S5 is "No", will will be supported according to the passive intermodulation signal amplitude value detected
The device circuit that disappears is switched to：The low isolation state of link between inter-modulated signal generator and counteracting coupler；And in setting steps S4
Status indicator is " enter passive intermodulation and offset operating mode ", terminates this logic.
In a kind of preferred embodiment of the present invention, the passive intermodulation signal detection and counteracting controlled quentity controlled variable calculate
Method include the following steps, SD1：By the man-machine interface of digital processing control unit input transmitted signal bandwidth and frequency range,
Receive signal bandwidth and frequency range, the order of dominant interference component in passive intermodulation signal and band information, it is desired it is passive mutually
The initial experience data of preset value and the curve, amplitude and the phase that change over time, maximum counteracting number etc. are adjusted, and is converted
At corresponding configuration parameter；SD2：To the signal of detection coupler coupling, passive intermodulation offsets detection circuit and filters out transmitting first
Signal is then converted into digital signal and inputs digital processing control unit；SD3：It is received according to related in step SD1
The configuration parameter of signal, the configuration parameter of passive intermodulation signal and the ginseng of the passive intermodulation digital filtering by being obtained in step 1
Number, the sampled signal that digital processing control unit offsets passive intermodulation detection circuit carry out digital filtering and operation, acquire and fall
Enter the range value to the passive intermodulation signal for receiving frequency range；SD4：Judge current working status；If the state of working condition
Ident value is " enter passive intermodulation and offset operating mode " then to continue following step, otherwise terminates this logic；The work shape
The status indicator default value of state is：" do not enter passive intermodulation and offset operating mode "； SD5：Step SD3 is calculated passive
Inter-modulated signal range value is compared with the passive intermodulation preset value in step SD1 whether to judge passive intermodulation signal amplitude
The passive intermodulation preset value being less than or equal to；SD6：If the judging result of step SD5 is "Yes", once it is distributed to before keeping
Amplitude, phase adjustment value in Canceller circuit and return to step SD2；SD7：If the judging result of step SD5 is "No",
Then the amplitude of Canceller circuit, phase adjustment value are obtained according to the handling result of SD3；If it is judged that continuous several times are
"No" and the number are more than " maximum offsets number " in step SD1, then set the status indicator value in step SD4 to " not into
Enter passive intermodulation and offset operating mode ", terminate this adjustment；SD8：By the amplitude of step SD6, phase adjustment value be distributed to
The amplitude modulation and phase modulation device to disappear in device circuit B；And return to step SD2.
Compared with the background technology, the present invention, the present invention has the beneficial effect that：
1, it both can be used for outside wireless transmitting-receiving equipments, can also be integrated in wireless transmitting-receiving equipments, and generate passive mutual
The position of negative function is adjusted to be located in wireless transmitting-receiving equipments near passive device antenna opening, it is ensured that wireless receiving and dispatching can be set
It is generated for any one equipment in link after the passive intermodulation signal and wireless transmitting-receiving equipments antenna opening generated or component
The component that passive intermodulation signal drops into reception frequency range is offset in wireless transmitting-receiving equipments near the antenna opening of passive device, and
And the result that index is required better than scheduled passive intermodulation is obtained in the receiving port of the passive device；
2, passive intermodulation offseting signal derives from the transmitting signal of wireless transmitting-receiving equipments, makes passive intermodulation offseting signal can
It is corresponding with each order passive intermodulation signal generated with transmitting signal, so as to according to wireless transmitting-receiving equipments practical application ring
Passive intermodulation signal interference point under border selects corresponding passive intermodulation offseting signal；
3, as a result of active intermodulation bucking circuit so that the adjusting of signal phase, amplitude can quantify, and improve
Adjustment precision and accuracy；
4, as a result of the feedback link of passive intermodulation signal cancellation effect so that passive intermodulation signal cancellation effect
It can be monitored in real time and adaptive dynamic adjusts, to work as through the signal on the passive device or following link
When power grade, working frequency change and when environment temperature etc. changes, can dynamic, real-time response, make nothing
Source inter-modulated signal offset result meets target value.Thus important Practical significance.
Description of the drawings
Fig. 1 is the device of the passive intermodulation generated in a kind of adaptive cancellation wireless transceiver system of the embodiment of the present invention
Structural schematic diagram.
Fig. 2 is the principle schematic of feed circuit A7 in multigroup coupler A in the embodiment of the present invention.
Fig. 3 is the schematic diagram of second of composition of multigroup coupler A in the embodiment of the present invention.
Fig. 4 is that the work of the modulation circuit 1 of Canceller circuit B in passive intermodulation canceller in the embodiment of the present invention is former
The intermodulation principle of cancellation schematic diagram of reason.
Fig. 5 is the schematic diagram of second of composition of Canceller circuit B in passive intermodulation canceller in the embodiment of the present invention.
Judge whether that entering passive intermodulation offsets working condition according to passive intermodulation detected value in Fig. 6 embodiment of the present invention
Method flow chart.
Fig. 7 is to emit signal frequency discrimination in the embodiment of the present invention and calculate the stream of the method for passive intermodulation digital filter parameters
Cheng Tu.
Fig. 8 is the flow chart for the method that passive intermodulation signal detection and counteracting controlled quentity controlled variable calculate in the embodiment of the present invention.
Fig. 9 is that the injection frequency link of passive intermodulation canceller in the embodiment of the present invention uses the schematic diagram of one of example
Figure 10 is that more radio frequency links of passive intermodulation canceller in the embodiment of the present invention use the schematic diagram of one of example.
Figure 11 is passive intermodulation canceller and the wireless transmitting-receiving equipments A1 for having multiple receiving-transmitting chains in the embodiment of the present invention
The schematic diagram of one of example when being used together.
Figure 12 is that a kind of structure of the wireless transmitting-receiving equipments of adaptive cancellation passive intermodulation signal is shown in the embodiment of the present invention
It is intended to.
Figure 13 is that passive intermodulation offsets the position view that detection circuit obtains signal in the embodiment of the present invention.
Specific implementation mode
Embodiment one：
Embodiment, as shown in Figure of description 1, the present embodiment is related to a kind of nothing installed outside wireless transmitting-receiving equipments A1
Source intermodulation offset device, the device include multigroup coupler A, Canceller circuit B, emit signal frequency detecting circuit C, passive intermodulation
Offset detection circuit D, digital processing control unit E；
1. the port in multigroup coupler A in the passive intermodulation canceller is connected to the day of wireless transmitting-receiving equipments A1
2. line mouth, another port pass through cable connection antenna A3；Antenna openings of the multigroup coupler A from wireless transmitting-receiving equipments A1
Be coupled out radiofrequency signal to this section of chain of antenna A3 road, three tunnels of the radiofrequency signal point export respectively to Canceller circuit B,
Emit signal frequency detecting circuit C, passive intermodulation offsets detection circuit D；Include transmitting signal, passive intermodulation in the radiofrequency signal
Signal and reception signal；
The coupler A4 that offsets in multigroup coupler A exports the radiofrequency signal coupling on strip line cable A2 extremely
Canceller circuit B in the passive intermodulation canceller, amplitude modulated phase converter B1 are generated on inter-modulated signal generator B2
The first intermodulation offseting signal identical with the passive intermodulation signal frequency point of wireless transmitting-receiving equipments A1；Letter is offset in first intermodulation
Number after the Canceller circuit B end reflections, again passes by amplitude modulation and phase modulation device B1 and the first intermodulation offseting signal is carried out
Processing makes it generate the first power signal；First power signal is coupled back into strip line cable A2 from counteracting coupler A4 again
Formation includes the second power signal of the second intermodulation offseting signal, second power signal in multigroup coupler A
Radiofrequency signal be overlapped, the second intermodulation offseting signal in second power signal and the wireless transmitting-receiving equipments A1
The passive intermodulation signal of generation has identical frequency, level and opposite phase；Processing of the amplitude modulation and phase modulation device B1 to signal
It is that the amplitude exported by the digital processing control unit E operations, phase controlling parameter are realized.
Radiofrequency signal coupling on strip line cable A2 is output to by the frequency discrimination coupler A5 in multigroup coupler A
The transmitting signal frequency detecting circuit C, by attenuator C1, frequency mixer C2 is mixed with local oscillator C3, by transmitting signal by radiofrequency signal
It is transformed into intermediate-freuqncy signal, which is equal to the intermediate-frequency filter C4 of transmitted bandwidth by pass band width and digital controllable increases
After beneficial amplifier C5 adjustment, digital signal is converted by analog-to-digital conversion device C6, realizes the sampling to emitting signal；The sampling is believed
It number is input to digital processing control unit E, carries out digital filtering processing and calculating, obtains known transmitting signal working frequency range
Specific transmitting signal frequency point, and then show that the passive intermodulation of wireless transmitting-receiving equipments A1 drops into the value of frequency point for receiving frequency range component,
The value of frequency point will offset the digital filter parameters of the digital signal of detection circuit D outputs as passive intermodulation；
Radiofrequency signal coupling on strip line cable A2 is output to by the detection coupler A6 in multigroup coupler A
The passive intermodulation offsets detection circuit D, first pass around passband be receive signal band, stopband is to emit penetrating for signal band
Frequency filter D 1, and pass through low-noise amplifier D2 is that receive signal band, stopband be transmitting signal band using passband
Radio-frequency filter D3, and pass through radio-frequency amplifier circuit D4, be input to frequency mixer D5 and be mixed with the signal of local oscillator D6, will be penetrated
Frequency signal is converted to intermediate-freuqncy signal, and intermediate-freuqncy signal is equal to the intermediate-frequency filter D7 of reception bandwidth by pass band width and number can
After controlling gain amplifier D8 adjustment, by analog-to-digital conversion device D9 conversion digital signals, realize to falling into reception frequency range in radiofrequency signal
The sampling of component；The sampled signal is input to digital processing control unit E, carries out digital filtering processing and calculating, obtains correspondence
In the first passive intermodulation signal detection for dropping into reception frequency range component for the passive intermodulation signal that wireless transmitting-receiving equipments A1 is generated
Value；
The digital processing control unit E obtains passive intermodulation preset value by man-machine interface first, when first nothing
When source inter-modulated signal detected value is less than or equal to passive intermodulation preset value, modulation circuit 1 will remain in the Canceller circuit B
First decaying state of value of default setting, first pad value make the inter-modulated signal generator in the Canceller circuit B
B2 does not generate intermodulation offseting signal, is not had an impact to the passive intermodulation index of wireless transmitting-receiving equipments A1, the first pad value is more than
40dB；When the first passive intermodulation value detection signal is more than preset passive intermodulation preset value, the digital processing
Control unit E will extrapolate the Canceller electricity according to the first passive intermodulation value detection signal using two-dimentional minimum value algorithm
The amplitude controlled quentity controlled variable and phase controlling amount of amplitude modulation and phase modulation device B1 in the B of road, the second intermodulation for making the Canceller circuit B generate
It is fallen into offseting signal in the passive intermodulation signal that the component for receiving frequency range and the wireless transmitting-receiving equipments A1 are generated and falls into reception
The component of frequency range has identical level and opposite phase, meets passive intermodulation preset value.
Multigroup coupler A described in the present embodiment need to be installed on the antenna opening of passive device A0 in wireless transmitting-receiving equipments A1
Between antenna, the port of multigroup coupler A is 1. connect with the antenna opening of passive device A0 in wireless transmitting-receiving equipments A1 and distance
It need to control in 0 to 1 meter；
The first structure of multigroup coupler A described in the present embodiment is as shown in Fig. 1, by strip line cable A2,
Coupler A4, frequency discrimination coupler A5 are offset, coupler A6 is detected, feed circuit A7 is constituted；Wherein feed circuit A7 is near nothing
Line transceiver A1 antenna openings side；Frequency discrimination coupler A5 is being offset between coupler A4 and detection coupler A6, detection coupling
Device A6 is near the sides antenna A3；The counteracting coupler A4, frequency discrimination coupler A5, detection coupler A6 is positive coupling
It exports, the isolation range between positive coupling port is 70dB or more；Offset the degree of coupling ranging from 25dB of coupler A4
To 45dB；The degree of coupling ranging from 30dB to the 50dB of frequency discrimination coupler A5；The degree of coupling ranging from 25dB of detection coupler A6 is arrived
35dB；Strip line cable A2 in multigroup coupler A includes but not limited to coaxial cable, microstrip line, strip line, coaxial
Bar；
Referring to Fig. 2, in the present embodiment, the feed circuit A7 is made of coaxial feed mobile jib A10 and feed inductance A11；
When passive device A0 antenna openings have power supply circuit in wireless transmitting-receiving equipments A1, coaxial feed mobile jib A10 was from passive device A0 days
Line mouth interface takes electricity, feed inductance A11 that power supply is imported to the number in passive intermodulation canceller from coaxial feed mobile jib A10 again
Plate unit 3 is controlled, feed inductance A11 plays the role of isolation transmitting signal；Coaxial feed mobile jib A10 and strip line cable A2 it
Between with polytetrafluoroethylene (PTFE) carry out DC isolation, the spacing of the two is at 0.4 millimeter to 1.1 millimeters；The feeding classification makes multigroup coupling
Device A obtains better passive intermodulation characteristic；
In addition, multigroup coupler A has second of composition in the present embodiment, referring to Fig. 3, multigroup coupler A is by strip line electricity
Cable A2 offsets coupler A4, frequency discrimination coupler A5, detects coupler A6, and feed circuit A7 is constituted；Wherein feed circuit A7 and
Feed circuit A7 in the first multigroup coupler A keeps identical position and structure；Coupler A6 is detected close to feed circuit
A7, and it is that reverse coupled exports to couple output, the degree of coupling ranging from 25dB to 35dB；It offsets coupler A4 and is located at detection coupling
Between clutch A6 and frequency discrimination coupler A5；Frequency discrimination coupler A5 closest to the port of strip line cable A2 2.；
The first structure of the Canceller circuit B described in the present embodiment is as shown in Fig. 1, its radio frequency input is defeated
Go out shared a port, by amplitude modulation and phase modulation device B1, inter-modulated signal generator B2 is in series.
Amplitude modulation and phase modulation device B1 described in the present embodiment is made of modulation circuit 1 and the serial connection of phase modulation circuit 2；The tune
Modulation circuit 1 in width phase converter B1 is made of fixed attenuator and voltage control variable gain attenuator；
Inter-modulated signal generator B2 described in the present embodiment, which is grounded or is opened a way by diode cathode, to be constituted；The radio frequency
Emit in signal the frequency of inter-modulated signal that signal generates on inter-modulated signal generator B2 with it is passive in the radiofrequency signal
Inter-modulated signal frequency is identical, and the range value of the inter-modulated signal is more than or equal to the passive intermodulation signal width in the radiofrequency signal
Angle value with offset the coupler A4 degrees of coupling and value；
In addition, Canceller circuit B has second of composition in the present embodiment, referring to Fig. 4, Canceller circuit B is by RF switch
B3, amplitude modulation and phase modulation device B1, inter-modulated signal generator B2 are in series；The default conditions of the RF switch B1 are 50 Europe of connection
The state of nurse load；
In addition, Canceller circuit B has the third composition in the present embodiment, referring to Fig. 5, Canceller circuit B is by RF switch
B3, circulator 4, amplitude modulation and phase modulation device B1, circulator 5, amplitude modulation and phase modulation device B4, inter-modulated signal generator B2 are in series；Wherein support
The device circuit B that disappears can also be directly connected to the connection for offsetting coupler A4 by the RF switch B3；The amplitude modulation
Phase converter B1 only includes modulation circuit 1 under such configuration；
Referring to Fig. 1, transmitting signal frequency detecting circuit C is mixed by attenuator C1, frequency mixer C2, local oscillator C3 described in the present embodiment,
Intermediate-frequency filter C4, digital controllable gain amplifier C5, analog-to-digital conversion device C6 are constituted；The passband band of the intermediate-frequency filter C4
Width is equal to transmitted bandwidth；
Referring to Fig. 1, passive intermodulation described in the present embodiment offsets detection circuit D by radio-frequency filter D1, low-noise amplifier
D2, radio-frequency filter D3, radio-frequency amplifier circuit D4, frequency mixer D5, local oscillator D6, intermediate-frequency filter D7, digital controllable gain are put
Big device D8 and analog-to-digital conversion device D9 are constituted；The passband of both radio-frequency filter D1 and radio-frequency filter D3 is to receive
Signal band, stopband are transmitting signal bands；The pass band width of the intermediate-frequency filter D7 is equal to reception bandwidth；The nothing
Source intermodulation is offset offset the input ports detection circuit D to the input ports analog-to-digital conversion device D9 from passive intermodulation in detection circuit D before this
The yield value range of section link is between 80~120dB；
Referring to Fig. 1, the digital processing control unit E described in the present embodiment is by digital signal processor as core devices
It constitutes, including but not limited to Field Programmable Gate Array Devices, central processing unit, digital signal processor etc.；At the number
Be that there are an interfaces between reason control unit E and Canceller circuit B passes to Canceller electricity by amplitude, the controlled quentity controlled variable of phase
Amplitude modulation and phase modulation device B1 in the B of road；It is that there are an interfaces between the digital processing control unit E and transmitting signal frequency detecting circuit C
To obtain the sampled signal of transmitting signal frequency detecting circuit C, carrying out the digital filtering for emitting signal and frequency identification and finally to count
Calculate the frequency point of passive intermodulation signal；The digital processing control unit E and passive intermodulation are to deposit between offsetting detection circuit D
In an interface to obtain the sampled signal that passive intermodulation offsets detection circuit D, the number filter of passive intermodulation signal is carried out
Wave and amplitude calculate, and according to calculated range value to amplitude modulation and phase modulation device B1 in Canceller circuit B into line amplitude, phase
Control；The digital processing control unit E man-machine interactive interfaces, effect are downloaded including but not limited to program, and configuration information is defeated
Enter, remote alarm and maintenance.The configuration information inputted is wherein needed to include transmitted signal bandwidth and frequency range, receive signal bandwidth
With the order and band information of the dominant interference component in frequency range, passive intermodulation signal, passive intermodulation signal preset value and with
The curve of time change, maximum counteracting number etc.；
The present embodiment includes a kind of method of passive intermodulation signal in adaptive cancellation wireless transceiver system, and feature exists
In：This approach includes the following steps, step 1, transmitting signal frequency discrimination and calculating passive intermodulation digital filter parameters；Step 2, profit
With the calculated passive intermodulation digital filter parameters of step 1, passive intermodulation signal amplitude value is sought；Step 3 is calculated using step 2
The passive intermodulation signal amplitude value gone out judges whether to need to carry out inter-modulated signal counteracting and the counteracting when needing to offset for no reason at all
Processing；Also, according in above-mentioned steps operation, foring a kind of realization transmitting signal frequency discrimination and calculate passive intermodulation number
The method of word filtering parameter, a kind of realization judge whether that entering passive intermodulation offsets working condition according to passive intermodulation detected value
Method and a kind of passive intermodulation signal detection and offset controlled quentity controlled variable calculate method.
Referring to Fig. 7, it is a kind of transmitting signal frequency discrimination and calculate passive intermodulation digital filter parameters method include following step
Suddenly, SC1：Input transmitted signal bandwidth and frequency range by the man-machine interface of digital processing control unit E, receive signal bandwidth and
Frequency range, the order of dominant interference component in passive intermodulation signal and band information, desired passive intermodulation preset value and with
The curve of time change, the initial experience data of amplitude and phase, maximum counteracting number etc., and be converted into configuring ginseng accordingly
Number；SC2：To the transmitting signal of frequency discrimination coupler A5 coupling, transmitting signal frequency detecting circuit C converts thereof into digital signal and defeated
Enter digital processing control unit E；SC3：Digital processing control unit E is according to the configuration ginseng in relation to emitting signal in step SC1
Number is filtered Screening Treatment to the sampled signal obtained by step SC2；SC4：Will through step SC3 treated data,
Calculate transmitting signal frequency point；SC5：By the calculated transmitting signal frequency point values of step SC4 and preceding primary calculated frequency point
Value is compared, to judge whether current transmitting signal frequency point changes；SC6：If the judging result of step SC5 is
"Yes" is obtained then according to the result of calculation of SC4 using the relationship of three ranks, five ranks, seven rank passive intermodulation signals and transmitting signal
Three ranks, five ranks, the frequency point of seven rank passive intermodulation signals；SC7：Digital processing control unit E is received according to related in step SC1
The frequency range configuration information of signal and the order configuration information of passive intermodulation interference signal configure screening conditions, sieve by look-up table
Choosing drops into the frequency point for receiving the passive intermodulation signal in frequency range band；SC8：By SC7 result of calculations, passive intermodulation letter is converted to
Number digital filter parameters are simultaneously stored into parameter allocation list；And update transmitting signal frequency point parameter in parameter allocation list；And it returns
Step SC2； SC9：If the judging result of step SC5 is "No", the preceding passive intermodulation in parameter allocation list is kept
Signal digital filter parameters and transmitting signal frequency point parameter；And return to step SC2.
Referring to Fig. 6, the method for passive intermodulation signal includes the following steps in a kind of adaptive cancellation wireless transceiver system,
S1：Input transmitted signal bandwidth and frequency range by the man-machine interface of digital processing control unit E, receive signal bandwidth and frequency range,
The order and band information of dominant interference component in passive intermodulation signal, desired passive intermodulation preset value and at any time
The curve of variation, the initial experience data of amplitude and phase, maximum counteracting number etc., and be converted into configuring parameter accordingly；
S2：According to the configuration parameter in relation to emitting signal in step S1, digital processing control unit E is to transmitting signal frequency detecting circuit C's
Sampled signal carries out operation, acquires the frequency point of passive intermodulation signal and is converted into respective digital filtering parameter and is stored into parameter matching
It sets in table；S3：According to the configuration parameter, the configuration parameter of passive intermodulation signal of related reception signal in step S1 and by step
The digital filter parameters of the passive intermodulation signal obtained in rapid S2, digital processing control unit E offset passive intermodulation and detect
The sampled signal of circuit D carries out digital filtering, filters out other signal components in addition to passive intermodulation signal, acquires and drop into
Receive the range value of the passive intermodulation signal of frequency range；S4：Judge current working status；The status indicator of the working condition is silent
Recognizing value is：" do not enter passive intermodulation and offset operating mode "；If the status indicator value of working condition is " not enter passive mutual
Adjust and offset operating mode " then continue following step, otherwise terminate this logic；S5：By the calculated passive intermodulation letters of step S3
Number range value is compared with the passive intermodulation preset value in step S1 to judge whether passive intermodulation signal amplitude is less than or equal to
Passive intermodulation preset value；S6：If the judging result of step S5 is "Yes", Canceller circuit B continues to keep inter-modulated signal
Link high-isolation state between generator and counteracting coupler, and return to step S2；S7：If the judging result of step S5
For "No", Canceller circuit B will be switched to according to the passive intermodulation signal amplitude value detected：Inter-modulated signal generator with
The low isolation state of link between counteracting coupler；And status indicator is " to enter passive intermodulation and offset work in setting steps S4
Pattern " terminates this logic.
Referring to Fig. 8, the method for passive intermodulation signal includes the following steps in a kind of adaptive cancellation wireless transceiver system,
SD1：Transmitted signal bandwidth and frequency range are inputted by the man-machine interface of digital processing control unit E, receive signal bandwidth and frequency
Section, the order of dominant interference component in passive intermodulation signal and band information, desired passive intermodulation preset value and at any time
Between change curve, amplitude and phase initial experience data, it is maximum offset number etc., and be converted into configuring parameter accordingly；
SD2：To the signal of detection coupler A6 couplings, passive intermodulation offsets detection circuit D and filters out transmitting signal first, then by it
It is converted into digital signal and inputs digital processing control unit E；SD3：According to the configuration ginseng in relation to receiving signal in step SD1
Number, the configuration parameter of passive intermodulation signal and the passive intermodulation digital filter parameters by being obtained in step 1, digital processing control
The sampled signal that unit E processed offsets passive intermodulation detection circuit D carries out digital filtering and operation, acquires and drops into reception frequency
The range value of the passive intermodulation signal of section；SD4：Judge current working status；If the status indicator value of working condition be " into
Enter passive intermodulation and offset operating mode " then continue following step, otherwise terminate this logic；The state mark of the working condition
Knowing default value is：" do not enter passive intermodulation and offset operating mode "；SD5：By the calculated passive intermodulation signal width of step SD3
Angle value is compared with the passive intermodulation preset value in step SD1 to judge what whether passive intermodulation signal amplitude was less than or equal to
Passive intermodulation preset value；SD6：If the judging result of step SD5 is "Yes", once Canceller circuit B is distributed to before keeping
In amplitude, phase adjustment value and return to step SD2；SD7：If the judging result of step SD5 is "No", according to SD3's
Handling result obtains the amplitude of Canceller circuit B, phase adjustment value；If it is judged that continuous several times are "No" and the number
More than " maximum offsets number " in step SD1, then the status indicator value in step SD4 is set as " not entering passive intermodulation to support
Disappear operating mode ", terminate this adjustment；SD8：The amplitude of step SD6, phase adjustment value are distributed in Canceller circuit B
Amplitude modulation and phase modulation device B1；And return to step SD2.
In addition, the passive intermodulation canceller described in the present embodiment, the signal of one of example is used in injection frequency link
Figure is as shown in Figure of description 9：Entire link includes but not limited to wireless transmitting-receiving equipments A1, passive intermodulation canceller, tower top
Amplifier A7, antenna A3 and connecting cable etc., and the passive intermodulation canceller port 1. antenna with wireless transmitting-receiving equipments A1
Mouth connection distance is within the scope of 0 to 1 meter；
In addition, the passive intermodulation canceller described in the present embodiment, the signal of one of example is used in more radio frequency links
Figure is as shown in Figure of description 10：Entire link includes multiple wireless transmitting-receiving equipments A1-1, A1-2 ... ..., multiple passive intermodulations
Canceller, more radio frequency system combiner A8, antenna A3 and connecting cable etc.；And there are one passive for each single branch
Intermodulation offset device and the single receiving-transmitting chain of wireless transmitting-receiving equipments connect, 1. passive intermodulation canceller port is received with wireless
The antenna opening for sending out equipment connects distance within the scope of 0 to 1 meter；
In addition, the passive intermodulation canceller described in the present embodiment, when wireless transmitting-receiving equipments have multiple receiving-transmitting chains,
Using the schematic diagram of one of example as shown in Figure of description 11：Entire link includes wireless transmitting-receiving equipments A1, multiple passive mutual
Adjust canceller, more antennas A3-1, A3-2 ... ... and connecting cable etc.；And wireless transmitting-receiving equipments each single transmitting-receiving
Link there are one passive intermodulation canceller connect, wherein passive intermodulation canceller port 1. with wireless transmitting-receiving equipments
Antenna opening connects distance within the scope of 0 to 1 meter；
After being installed on wireless transceiver system link using the passive intermodulation canceller of the present invention, in link passive intermodulation
When arriving -95dBm/Hz for -80dBm/Hz, the present apparatus can make passive intermodulation signal cancellation result be more than 20dB, passive in link
When intermodulation is better than -95dBm/Hz, the present apparatus can make passive intermodulation signal cancellation result at least better than -115dBm/Hz；
Embodiment two：
Second of embodiment, as shown in Figure of description 12, the present embodiment is related to a kind of inside and is equipped with passive intermodulation supporting
Disappear the wireless transmitting-receiving equipments A1 of device, and passive intermodulation canceller therein includes offsetting coupler A4, detects coupler A6,
Canceller circuit B, emits signal frequency detecting circuit C, and passive intermodulation offsets detection circuit D, digital processing control unit E；
It is described offset coupler A4 close to the passive device A0 in wireless transmitting-receiving equipments A1 antenna opening, from chain road
Very small part is coupled out in radiofrequency signal, the radiofrequency signal after coupling, which exports, gives Canceller circuit B；The detection coupler
From the receives link forward direction coupled signal of wireless transmitting-receiving equipments A1, the reception signal after coupling is exported offsets A6 to passive intermodulation
Detection circuit D；
The Canceller circuit B includes amplitude modulation and phase modulation device B1 and inter-modulated signal generator B2, between counteracting coupler A4
Radio frequency input and output share a port i.e. be known as input/output port；When Canceller circuit B is obtained from input/output port
After the radiofrequency signal of coupling, by amplitude modulation and phase modulation device B1 to the radiofrequency signal carry out first time processing, by first time handle after by
The inter-modulated signal generator B2 generates the first intermodulation identical with the passive intermodulation signal frequency point of wireless transmitting-receiving equipments A1 and offsets
Signal；The first intermodulation offseting signal is after the Canceller circuit B end reflections, then by amplitude modulation and phase modulation device B1 to described
First intermodulation offseting signal carries out second and handles, it is made to generate the first power signal；First power signal is again from described
Input/output port includes the second intermodulation offseting signal second through being formed at counteracting coupler A4 coupling back signal acquisitions
Power signal, second power signal are overlapped with the radiofrequency signal in the counteracting coupler A4, second power
The second intermodulation offseting signal in signal is identical with the passive intermodulation signal that wireless transmitting-receiving equipments A1 transmitting signals generate
Frequency, level and opposite phase；The amplitude modulation and phase modulation device B1 is by the digital processing control unit to the processing of signal
Amplitude, the phase controlling parameter of E operations output are realized.
Due to emission signal frequency known to wireless transmitting-receiving equipments A1 described in embodiment, so launching frequency value and phase
The digital filter parameters for the passive intermodulation sampled signal answered will be digitally processed control unit E and directly apply；
It includes low-noise amplifier D2, radio-frequency amplifier circuit D4, frequency mixer that the passive intermodulation, which offsets detection circuit D,
D5, local oscillator D6, intermediate-frequency filter D7, digital controllable gain amplifier D8 and analog-to-digital conversion device D9；The passive intermodulation supports
The detection circuit that disappears D inputs to low-noise amplifier D2 and radio-frequency amplifier circuit after detection coupler A6 obtains radiofrequency signal
D4, then be input to frequency mixer D5 and be mixed with the signal of local oscillator D6, radiofrequency signal is converted into intermediate-freuqncy signal, intermediate-freuqncy signal is passed through
After pass band width is equal to intermediate-frequency filter D7 and the digital controllable gain amplifier D8 adjustment of reception bandwidth, by analog-to-digital conversion device
D9 conversion digital signals realize the sampling to the radiofrequency signal；The sampled signal is input to digital processing control unit E and carries out
Signal processing forms the first sampling and receives signal, and first sampling receives signal and is input to the digital processing control unit
E carries out digital filtering processing and calculating, show that the dropping into for passive intermodulation signal generated corresponding to wireless transmitting-receiving equipments A1 connects
Receive the first passive intermodulation value detection signal of frequency range component；
The digital processing control unit E obtains passive intermodulation preset value by man-machine interface first, when first nothing
When source inter-modulated signal detected value is less than or equal to passive intermodulation preset value, amplitude modulation and phase modulation device B1 will be kept in the Canceller circuit B
In the first decaying state of value of default setting, first pad value makes the inter-modulated signal in the Canceller circuit B occur
Device B2 does not generate intermodulation offseting signal, is not had an impact to the passive intermodulation index of wireless transmitting-receiving equipments A1；When first nothing
When source inter-modulated signal detected value is more than preset passive intermodulation preset value, the digital processing control unit E will be according to the
One passive intermodulation value detection signal extrapolates the amplitude modulation and phase modulation device in the Canceller circuit B using two-dimentional minimum value algorithm
The amplitude controlled quentity controlled variable and phase controlling amount of B1, makes to fall into the second intermodulation offseting signal that the Canceller circuit B generates and connects
Receive fallen into the passive intermodulation signal that is generated with the wireless transmitting-receiving equipments A1 of component of frequency range reception frequency range component have it is identical
Level and opposite phase, meet passive intermodulation preset value.
In addition, in second of embodiment, referring to Figure 13, when passive intermodulation offsets detection circuit D from wireless transmitting-receiving equipments A1
Receives link in low-noise amplifier F1 after 7. 8. this section of chain road of number position obtains and believes before number position and frequency mixer
Number when, then the low-noise amplifier D2 that passive intermodulation is offset in detection circuit D is saved；
In second of embodiment, referring to Figure 13, when 6. passive intermodulation offsets detection circuit D from the port of passive device A0
When 8. certain of this section of link of number position obtains signal before to frequency mixer F3, from the port of passive device A0 6. to nothing
Link gain ranging from 60dB to the 90dB before the frequency mixer D5 of detection circuit D is offset in source intermodulation：
Referring to Figure 12, due to the existing digit processing and control element (PCE) E of wireless transmitting-receiving equipments A1 described in embodiment, the nothing
Digital processing control unit and the digital processing control unit E of wireless transmitting-receiving equipments A1 in the intermodulation offset device of source share；Phase
It answers, the program of passive intermodulation canceller is all integrated in the global procedures of wireless transmitting-receiving equipments A1.
After the wireless transmitting-receiving equipments completed using present invention design are installed on antenna-feeder system link, in link passive intermodulation
When arriving -95dBm/Hz for -80dBm/Hz, the present apparatus can make passive intermodulation signal cancellation result be more than 20dB, passive in link
When intermodulation is better than -95dBm/Hz, the present apparatus can make passive intermodulation signal cancellation result at least better than -115dBm/Hz.
It should be understood that these are only the specific implementation mode of the present invention, but protection scope of the present invention is not limited to
In this, any technical person familiar with the field within the technical scope disclosed by the invention, the variation that can readily occur in or is replaced
It changes, should be covered by the protection scope of the present invention.
Claims (20)
1. the device of passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system, it includes multigroup coupler (A), offsets
Device circuit (B), transmitting signal frequency detecting circuit (C), passive intermodulation offset detection circuit (D) and digital processing control unit (E)；Its
It is characterized in that：
The a port of multigroup coupler (A) connect with the antenna opening of wireless transmitting-receiving equipments (A1), another port and day
Line (A3) connects；Multigroup coupler (A) is from the antenna opening of wireless transmitting-receiving equipments (A1) to this section of chain road of antenna (A3)
Be coupled out radiofrequency signal, three tunnels of the radiofrequency signal point export respectively to Canceller circuit (B), transmitting signal frequency detecting circuit (C),
Passive intermodulation offsets detection circuit (D)；Include transmitting signal, passive intermodulation signal and reception signal in the radiofrequency signal；
It exports to the amplitude modulated phase converter of radiofrequency signal (B1) and inter-modulated signal generator (B2) of the Canceller circuit (B) and handles
The first intermodulation that identical as the passive intermodulation signal frequency in the radiofrequency signal, amplitude is different and phase is different is produced afterwards to support
Disappear signal；The first intermodulation offseting signal is after Canceller circuit (B) end reflection, again by amplitude modulation and phase modulation device (B1)
Processing, and couple output to multigroup coupler (A), formed it is identical as the passive intermodulation signal frequency in the radiofrequency signal,
Amplitude is identical and the second intermodulation offseting signal of opposite in phase, the second intermodulation offseting signal with it is passive in the radiofrequency signal
Inter-modulated signal is offset, and the passive intermodulation signal after counteracting is less than or equal to passive intermodulation preset value；The amplitude modulation and phase modulation device
(B1) amplitude that adjustment is exported by digital processing control unit (E) operation, phase controlling parameter are realized；The wireless receiving and dispatching
In equipment (A1) passive device (A0) generate passive intermodulation gradually change at any time, will be arranged in the present apparatus passive intermodulation with
The preset value curve of time change；
The transmitting signal frequency detecting circuit (C) is used to the radiofrequency signal that coupling comes being converted into digital signal, and the number is believed
Number being input to digital processing control unit (E) is analyzed and is calculated, and obtains the specific transmitting of known transmitting signal working frequency range
Signal frequency point, and then show that the passive intermodulation of wireless transmitting-receiving equipments (A1) drops into the value of frequency point for receiving frequency range component, the frequency point
Value will be converted into digital filter parameters for handling passive intermodulation sampled signal；
The passive intermodulation offsets detection circuit (D) and is used to fall the passive intermodulation signal for coupling the wireless transmitting-receiving equipments (A1) come
Enter to receiving frequency range component and be converted into digital signal and be input to digital processing control unit (E), carry out digital filtering processing and
It calculates, realizes the amplitude detection for dropping into the component for receiving frequency range to passive intermodulation signal；
The digital processing control unit (E) obtains passive intermodulation preset value by man-machine interface first, then will be described passive
The detected amplitude of inter-modulated signal is compared with passive intermodulation preset value；When the detected amplitude is less than or equal to the preset value
When, the Canceller circuit (B) does not generate intermodulation offseting signal, is not generated to the passive intermodulation index of wireless transmitting-receiving equipments (A1)
It influences；When the detected amplitude is more than the preset value, the Canceller circuit (B) is generated by the adjustment of amplitude and phase
Go out that, amplitude identical as wireless transmitting-receiving equipments (A1) passive intermodulation signal frequency be identical and intermodulation offseting signal and the institute of opposite in phase
The passive intermodulation signal stated in radiofrequency signal is offset.
2. the device of passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system according to claim 1, special
Sign is that multigroup coupler (A) is by strip line cable (A2), counteracting coupler (A4), frequency discrimination coupler (A5), detection coupling
Clutch (A6) and feed circuit (A7) are constituted；The first port of multigroup coupler (A) and nothing in wireless transmitting-receiving equipments (A1)
Cable connection of the antenna opening length of source device (A0) in 0 to 1 meter of range；The counteracting coupler (A4) sets from wireless receiving and dispatching
Chain road after standby (A1) antenna opening is coupled out radiofrequency signal and is output to Canceller circuit (B), offsets coupler (A4)
The degree of coupling ranging from 25dB to 45dB；The frequency discrimination coupler (A5) from after wireless transmitting-receiving equipments (A1) antenna opening chain road
It is coupled out radiofrequency signal and is output to transmitting signal frequency detecting circuit (C), the degree of coupling ranging from 30dB of frequency discrimination coupler (A5) is arrived
50dB；The detection coupler (A6) is coupled out radiofrequency signal and defeated from the chain road after wireless transmitting-receiving equipments (A1) antenna opening
Go out to passive intermodulation and offsets detection circuit (D), the degree of coupling ranging from 25dB to the 35dB of detection coupler (A6)；Three couplings are defeated
Isolation range between outlet is 70dB or more；The passive intermodulation value that multigroup coupler (A) itself generates is less than predetermined
Value；The characteristic curve that the passive intermodulation value that multigroup coupler (A) itself generates changes over time is obtained by testing；It is described
Strip line cable (A2) in multigroup coupler (A) includes but not limited to coaxial cable, microstrip line, strip line, same to shaft.
3. the device of passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system according to claim 1 or 2,
It is characterized in that：Coupler (A4) is offset from the radiofrequency signal that the chain road after wireless transmitting-receiving equipments (A1) antenna opening is coupled out
Only transmitting signal can generate the intermodulation offseting signal offset for passive intermodulation on the inter-modulated signal generator (B2),
Reception signal and passive intermodulation signal in the radiofrequency signal will not generate the work on the inter-modulated signal generator (B2)
With；
The frequency for emitting the inter-modulated signal that signal generates on inter-modulated signal generator (B2) in the radiofrequency signal is penetrated with described
Passive intermodulation signal frequency in frequency signal is identical, but the range value of the inter-modulated signal is more than or equal to the nothing in the radiofrequency signal
Source inter-modulated signal range value with offset coupler (A4) degree of coupling and value；
The inter-modulated signal generator (B2) generates the characteristic curve that inter-modulated signal changes over time and is obtained by testing.
4. the device of passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system according to claim 1 or 2,
It is characterized in that：The Canceller circuit (B) directly connect with counteracting coupler (A4), or is coupled with counteracting by RF switch
Device (A4) connects.
5. the device of passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system according to claim 1 or 2,
It is characterized in that：Coupler (A4), other end connection are offset in the one end amplitude modulation and phase modulation device (B1) connection in the Canceller circuit (B)
Inter-modulated signal generator (B2), the amplitude modulation and phase modulation device (B1) include modulation circuit (1) and phase modulation circuit (2)；Or it described supports
The amplitude modulation and phase modulation device one end (B1) to disappear in device circuit (B) is connect by the first circulator (4) with coupler (A4) is offset, the other end
It is connect with inter-modulated signal generator (B2) by the second circulator (5), the amplitude modulation and phase modulation device (B1) only includes modulation circuit
(1)。
6. the device of passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system according to claim 1 or 2,
It is characterized in that：The inter-modulated signal that inter-modulated signal generator (B2) generates in the Canceller circuit (B) is by reflection, by amplitude modulation
Phase converter (B1) offsets coupler (A4), is coupled back into strip line cable (A2) and forms passive intermodulation offseting signal, with wireless receiving and dispatching
The passive intermodulation signal generated in equipment (A1) is offset；Or by the second circulator (5), amplitude modulation and phase modulation device (B4),
One circulator (4) offsets coupler (A4), is coupled to strip line cable (A2) and the passive intermodulation of wireless transmitting-receiving equipments (A1) is believed
It number is offset.
7. the device of passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system according to claim 1, special
Sign is：The transmitting signal frequency detecting circuit (C) includes the attenuator being sequentially connected in series, mixer, intermediate-frequency filter, number
Controllable gain amplifier and analog-to-digital conversion device；The pass band width of the intermediate-frequency filter is equal to transmitted bandwidth, the frequency mixer electricity
It route frequency mixer and local oscillator is constituted.
8. the device of passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system according to claim 1, special
Sign is：It includes the first radio-frequency filter, low-noise amplifier, the filter of the second radio frequency that the passive intermodulation, which offsets detection circuit (D),
Wave device, radio-frequency amplifier circuit, frequency mixer, local oscillator, intermediate-frequency filter, digital controllable gain amplifier and analog-to-digital conversion device；Institute
The passband for stating both the first radio-frequency filter and second radio-frequency filter is that reception signal band, stopband are to emit letter
Number frequency band；The pass band width of the intermediate-frequency filter is equal to reception bandwidth；The passive intermodulation is offset in detection circuit (D) from nothing
Source intermodulation offsets the detection circuit input port (D) to passive intermodulation and offsets in detection circuit (D) before analog-digital converter input port this
The yield value range of section link is between 80~120dB；It is isolated with metal cavitg per level-one signal amplification circuit.
9. the device of passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system according to claim 1, special
Sign is：The digital processing control unit (E) includes programmable logic device, central processing unit and digital signal processor；
It is that there are an interfaces between the digital processing control unit (E) and Canceller circuit (B) to pass amplitude, the controlled quentity controlled variable of phase
Pass amplitude modulation and phase modulation device (B1) in Canceller circuit (B)；The digital processing control unit (E) and transmitting signal frequency detecting circuit
(C) it is to carry out the number of transmitting signal there are an interface to obtain the sampled signal of transmitting signal frequency detecting circuit (C) between
Filtering and frequency identification and the frequency point for finally calculating passive intermodulation signal；The digital processing control unit (E) with it is passive mutually
It is the presence of an interface to obtain the sampled signal of passive intermodulation counteracting detection circuit (D) to adjust between offsetting detection circuit (D),
The digital filtering and amplitude for carrying out passive intermodulation signal calculate, and according to calculated range value to being adjusted in Canceller circuit (B)
Control of the width phase converter (B1) into line amplitude, phase；Digital processing control unit (E) man-machine interactive interface, effect packet
Contain but be not limited to program download, configuration information input, remote alarm and maintenance；It includes transmitting wherein to need the configuration information inputted
Signal bandwidth and frequency range, receive signal bandwidth and frequency range, dominant interference component in passive intermodulation signal order and frequency range letter
Breath, passive intermodulation signal preset value and the curve changed over time, maximum counteracting number；
The man-machine interactive interface can also carry out data interaction with internet backstage resource：Upload the equipment running process
In passive intermodulation value, the experience curve and passive intermodulation signal adaptive canceller that passive intermodulation value changes over time
In each modular circuit status information；Or it downloads the passive intermodulation signal preset value after complex optimum and changes over time
Curve.
10. a kind of includes the wireless transceiver system of adaptive cancellation passive intermodulation signal device, including wireless transmitting-receiving equipments
(A1) and it is installed on the external antenna feeder link of wireless transmitting-receiving equipments (A1), it is characterised in that：Antenna feeder chain road is provided with such as right
It is required that in adaptive cancellation wireless transceiver system described in 1 passive intermodulation signal device, the wireless transmitting-receiving equipments (A1)
Each antenna opening has the device by 0~1 meter of cable connection, and the corresponding passive device of each antenna opening of wireless transmitting-receiving equipments is produced
After raw passive intermodulation signal and wireless transmitting-receiving equipments antenna opening in link any one equipment or component generate it is passive
Inter-modulated signal drops into the component counteracting for receiving frequency range, reaches passive intermodulation pre-set level；Cable is specific in 0 to 1 meter of range
Length is offset optimum efficiency by passive intermodulation and is determined；The equipment of every antenna feeder link or component including but not limited to cable,
Connector, tower amplifier, combiner, antenna.
11. it is according to claim 10 it is a kind of include adaptive cancellation passive intermodulation signal device wireless receiving and dispatching system
System, it is characterised in that：When in antenna feeder link including more radio frequency system combiners, the present apparatus can also be pacified by 0~1 meter of cable
The antenna opening of more radio frequency system combiners is filled to this section of link between antenna, more radio frequency system combiner antenna openings are generated
Passive intermodulation signal and more radio frequency system combiner antenna openings after any one equipment or component generate in link nothing
Source inter-modulated signal drops into the component counteracting for receiving frequency range, reaches passive intermodulation pre-set level；Cable has in 0 to 1 meter of range
Body length is offset optimum efficiency by passive intermodulation and is determined.
12. it is a kind of can adaptive cancellation passive intermodulation signal wireless transmitting-receiving equipments, it is characterised in that：The wireless transmitting-receiving equipments
(A1) it is internally provided with the device of passive intermodulation signal in adaptive cancellation wireless transceiver system as described in claim 1.
13. it is according to claim 12 it is a kind of can adaptive cancellation passive intermodulation signal wireless transmitting-receiving equipments, feature
It is：It is described adaptive when the wireless transmitting-receiving equipments (A1) emission signal frequency frequency discrimination signal or known emission signal frequency
The device of passive intermodulation signal in wireless transceiver system should be offset by counteracting coupler (A4), detection coupler (A6), Canceller
Circuit (B), passive intermodulation offset detection circuit (D) and digital processing control unit (E) composition；The counteracting coupler (A4) is straight
Passive device (A0) antenna opening in wireless transmitting-receiving equipments (A1) is connect in succession；The detection coupler (A6) sets mounted on wireless receiving and dispatching
The radio frequency reception link of standby (A1)；It includes low-noise amplifier, radio frequency amplifier electricity that the passive intermodulation, which offsets detection circuit (D),
Road, frequency mixer, local oscillator, intermediate-frequency filter, digital controllable gain amplifier and analog-to-digital conversion device.
14. it is according to claim 12 it is a kind of can adaptive cancellation passive intermodulation signal wireless transmitting-receiving equipments, feature
It is：When being provided with low-noise amplifier and radio frequency amplifier in wireless transmitting-receiving equipments (A1), the passive intermodulation offsets inspection
Slowdown monitoring circuit (D) shares this low-noise amplifier and radio frequency amplifier with the wireless transmitting-receiving equipments (A1).
15. it is according to claim 12 it is a kind of can adaptive cancellation passive intermodulation signal wireless transmitting-receiving equipments, feature
It is：When being provided with digital processing control unit (E) in the wireless transmitting-receiving equipments (A1), the adaptive cancellation is wirelessly received
A shared digital processing control unit for the device of passive intermodulation signal and the wireless transmitting-receiving equipments (A1) in hair system
(E)。
16. a kind of one kind as described in any one of claim 12-15 claims can adaptive cancellation passive intermodulation letter
Number wireless transmitting-receiving equipments, it is characterised in that：When wireless transceiver system is put including but not limited to wireless transmitting-receiving equipments (A1), tower top
It, can be by wireless receiving and dispatching when the multiple equipments such as big device, radio-frequency receiving-transmitting chain combiner, more radio frequency system combiners, antenna or component
Nothing that equipment (A1) generates and that any one equipment or component generate in link after wireless transmitting-receiving equipments (A1) antenna opening
Source intermodulation drops into the component counteracting for receiving frequency range, is obtained better than scheduled in the receives link in wireless transmitting-receiving equipments (A1)
Passive intermodulation requires the result of index；The wireless transmitting-receiving equipments (A1) include but not limited to Remote Radio Unit, with transmitting-receiving
The base station equipment of letter machine, radio station apparatus.
17. a kind of method of passive intermodulation signal in adaptive cancellation wireless transceiver system, it is characterised in that：This method include with
Lower step,
Step 1, transmitting signal frequency discrimination and calculating passive intermodulation digital filter parameters；
Step 2, using the calculated passive intermodulation digital filter parameters of step 1, seek passive intermodulation signal amplitude value；
Step 3 judges whether to need to carry out inter-modulated signal counteracting for no reason at all using the calculated passive intermodulation signal amplitude value of step 2
And the counteracting processing when needing to offset；
According in above-mentioned steps operation, foring a kind of realization transmitting signal frequency discrimination and calculate passive intermodulation digital filtering ginseng
Several method, a kind of realize judge whether to enter the method and one that passive intermodulation offsets working condition according to passive intermodulation detected value
Kind passive intermodulation signal detection and the method for offsetting controlled quentity controlled variable calculating.
18. the method for passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system according to claim 17,
It is characterized in that：The transmitting signal frequency discrimination and the method for calculating passive intermodulation digital filter parameters include the following steps,
SC1：Transmitted signal bandwidth and frequency range are inputted by the man-machine interface of digital processing control unit (E), receive signal bandwidth
With the order and band information of the dominant interference component in frequency range, passive intermodulation signal, desired passive intermodulation preset value and
The initial experience data of the curve, amplitude and the phase that change over time, maximum counteracting number etc., and be converted into configuring ginseng accordingly
Number；
SC2：To the transmitting signal of frequency discrimination coupler (A5) coupling, transmitting signal frequency detecting circuit (C) converts thereof into digital signal
And input digital processing control unit (E)；
SC3：Digital processing control unit (E) is according to the configuration parameter in relation to emitting signal in step SC1, to passing through step SC2
The sampled signal of acquisition is filtered Screening Treatment；
SC4：Transmitting signal frequency point will be calculated through step SC3 treated data；
SC5：The calculated transmitting signal frequency point values of step SC4 and preceding primary calculated value of frequency point are compared, to judge
Whether current transmitting signal frequency point changes；
SC6：If the judging result of step SC5 is "Yes", according to the result of calculation of SC4, using three ranks, five ranks, seven ranks without
Source inter-modulated signal and the relationship of transmitting signal obtain three ranks, five ranks, the frequency point of seven rank passive intermodulation signals；
SC7：Digital processing control unit (E) is according to the frequency range configuration information and passive intermodulation in relation to receiving signal in step SC1
The order configuration information of interference signal configures screening conditions by look-up table, and screening drops into passive mutual in reception frequency range band
Adjust the frequency point of signal；
SC8：By SC7 result of calculations, is converted to passive intermodulation signal digital filter parameters and is stored into parameter allocation list；And more
Emit signal frequency point parameter in new parameter allocation list；And return to step SC2；
SC9：If the judging result of step SC5 is "No", the preceding passive intermodulation signal number in parameter allocation list is kept
Word filtering parameter and transmitting signal frequency point parameter；And return to step SC2.
19. the method for passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system according to claim 17,
It is characterized in that：The foundation passive intermodulation detected value judge whether enter passive intermodulation offset working condition method include with
Lower step,
S1：Input transmitted signal bandwidth and frequency range by the man-machine interface of digital processing control unit (E), receive signal bandwidth and
Frequency range, the order of dominant interference component in passive intermodulation signal and band information, desired passive intermodulation preset value and with
The curve of time change, the initial experience data of amplitude and phase, maximum counteracting number etc., and be converted into configuring ginseng accordingly
Number；
S2：According to the configuration parameter in relation to emitting signal in step S1, digital processing control unit (E) is to transmitting signal frequency discrimination electricity
The sampled signal on road (C) carries out operation, acquires the frequency point of passive intermodulation signal and is converted into respective digital filtering parameter and is stored into
In parameter allocation list；
S3：According to the configuration parameter, the configuration parameter of passive intermodulation signal of related reception signal in step S1 and by step S2
The digital filter parameters of the passive intermodulation signal of middle acquisition, digital processing control unit (E) offset detection circuit to passive intermodulation
(D) sampled signal carries out digital filtering, filters out other signal components in addition to passive intermodulation signal, acquires and drop into reception
The range value of the passive intermodulation signal of frequency range；
S4：Judge current working status；The status indicator default value of the working condition is：" does not enter passive intermodulation and offset work
Operation mode "；Continue following step if the status indicator value of working condition is " do not enter passive intermodulation and offset operating mode ",
Otherwise terminate this logic；
S5：By the passive intermodulation preset value in the calculated passive intermodulation signal amplitude values of step S3 and step S1 compare with
Judge the passive intermodulation preset value whether passive intermodulation signal amplitude is less than or equal to；
S6：If the judging result of step S5 is "Yes", Canceller circuit (B) continues to keep inter-modulated signal generator and offset
Link high-isolation state between coupler；And return to step S2；
S7：It, will be electric by Canceller according to the passive intermodulation signal amplitude value detected if the judging result of step S5 is "No"
(B) is switched on road：The low isolation state of link between inter-modulated signal generator and counteracting coupler；And state in setting steps S4
It is identified as " enter passive intermodulation and offset operating mode ", terminates this logic.
20. the method for passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system according to claim 17,
It is characterized in that：It the passive intermodulation signal detection and offsets the method that controlled quentity controlled variable calculates and includes the following steps,
SD1：Transmitted signal bandwidth and frequency range are inputted by the man-machine interface of digital processing control unit (E), receive signal bandwidth
With the order and band information of the dominant interference component in frequency range, passive intermodulation signal, desired passive intermodulation preset value and
The initial experience data of the curve, amplitude and the phase that change over time, maximum counteracting number etc., and be converted into configuring ginseng accordingly
Number；
SD2：To the signal that detection coupler (A6) couples, passive intermodulation offsets detection circuit (D) and filters out transmitting signal first, so
After convert thereof into digital signal and input digital processing control unit (E)；
SD3：According to the configuration parameter, the configuration parameter of passive intermodulation signal of related reception signal in step SD1 and by step 1
The passive intermodulation digital filter parameters of middle acquisition, digital processing control unit (E) are offset detection circuit (D) to passive intermodulation and are adopted
Sample signal carries out digital filtering and operation, acquires the range value for dropping into the passive intermodulation signal for receiving frequency range；
SD4：Judge current working status；If the status indicator value of working condition is " enter passive intermodulation and offset operating mode "
Then continue following step, otherwise terminates this logic；The status indicator default value of the working condition is：" do not enter passive mutual
It adjusts and offsets operating mode "；
SD5：Passive intermodulation preset value in the calculated passive intermodulation signal amplitude values of step SD3 and step SD1 is carried out pair
Than to judge passive intermodulation preset value that whether passive intermodulation signal amplitude is less than or equal to；
SD6：If the judging result of step SD5 is "Yes", the preceding primary amplitude being distributed in Canceller circuit (B) of holding,
Phase adjustment value and return to step SD2；
SD7：If the judging result of step SD5 is "No", the handling result according to SD3 obtains the width of Canceller circuit (B)
Degree, phase adjustment value；If it is judged that continuous several times are "No" and the number is more than " maximum offsets number " in step SD1,
It then sets the status indicator value in step SD4 to " do not enter passive intermodulation and offset operating mode ", terminates this adjustment；
SD8：The amplitude modulation and phase modulation device (B1) amplitude of step SD6, phase adjustment value being distributed in Canceller circuit (B)；And it returns
Return step SD2.
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| PCT/CN2018/125172 WO2019153959A1 (en) | 2018-02-09 | 2018-12-29 | Apparatus and method for adaptively cancelling passive intermodulation signal in wireless transceiving system |
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| WO2020103434A1 (en) * | 2018-09-27 | 2020-05-28 | 香港梵行科技有限公司 | Device and method for self-adaptive cancellation of passive intermodulation signal, and application apparatus |
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| WO2021046677A1 (en) * | 2019-09-09 | 2021-03-18 | 华为技术有限公司 | Pim self-cancellation method and device |
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| WO2019153959A1 (en) * | 2018-02-09 | 2019-08-15 | 香港梵行科技有限公司 | Apparatus and method for adaptively cancelling passive intermodulation signal in wireless transceiving system |
| WO2020103433A1 (en) * | 2018-09-27 | 2020-05-28 | 香港梵行科技有限公司 | Method and apparatus for adaptive cancellation of passive intermodulation signal, and application device |
| WO2020103434A1 (en) * | 2018-09-27 | 2020-05-28 | 香港梵行科技有限公司 | Device and method for self-adaptive cancellation of passive intermodulation signal, and application apparatus |
| WO2020113927A1 (en) * | 2018-09-29 | 2020-06-11 | 香港梵行科技有限公司 | Apparatus and method for self-adaptively cancelling passive intermodulation signal |
| WO2020113928A1 (en) * | 2018-09-29 | 2020-06-11 | 香港梵行科技有限公司 | Apparatus and method for adaptively cancelling passive intermodulation signals |
| CN109359423A (en) * | 2018-11-16 | 2019-02-19 | 北京理工大学 | A kind of method of quick determining 3 rank passive intermodulation product level of rectangular waveguide flange |
| CN109359423B (en) * | 2018-11-16 | 2020-10-23 | 北京理工大学 | Method for rapidly determining 3-order passive intermodulation product level of rectangular waveguide flange |
| CN109474288A (en) * | 2019-01-14 | 2019-03-15 | 上海创远仪器技术股份有限公司 | The circuit structure of receiver dynamic range is improved based on reverse phase cancellation mechanism |
| CN109474288B (en) * | 2019-01-14 | 2024-03-15 | 上海创远仪器技术股份有限公司 | Circuit structure for improving dynamic range of receiver based on reverse phase offset mechanism |
| WO2021046677A1 (en) * | 2019-09-09 | 2021-03-18 | 华为技术有限公司 | Pim self-cancellation method and device |
| CN112993503A (en) * | 2019-12-17 | 2021-06-18 | 伊兰泰克公司 | 5G universal passive intermodulation distortion coupling mode filter and filtering method |
| CN112993503B (en) * | 2019-12-17 | 2022-03-08 | 伊兰泰克公司 | 5G general coupling filter |
| CN111257638A (en) * | 2020-01-19 | 2020-06-09 | 浙江大学 | Broadband passive intermodulation test and positioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108777585B (en) | 2020-07-10 |
| WO2019153959A1 (en) | 2019-08-15 |
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