CN109995394A - A kind of devices and methods therefor of adaptive cancellation passive intermodulation signal - Google Patents

A kind of devices and methods therefor of adaptive cancellation passive intermodulation signal Download PDF

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Publication number
CN109995394A
CN109995394A CN201811467208.9A CN201811467208A CN109995394A CN 109995394 A CN109995394 A CN 109995394A CN 201811467208 A CN201811467208 A CN 201811467208A CN 109995394 A CN109995394 A CN 109995394A
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signal
passive intermodulation
frequency
duplexer
amplitude
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CN109995394B (en
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孟庆南
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Hongkong Fan Xing Technology Co Ltd
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Hongkong Fan Xing Technology Co Ltd
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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
    • 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

Abstract

The invention discloses a kind of devices of adaptive cancellation passive intermodulation signal, one primary path port of coupler is connect with the antenna opening of the duplexer, another primary path port is connect with the antenna feeder component in antenna link, the coupling port of coupler and the prevention at radio-frequency port electrical connection of Canceller circuit；The input terminal of the passive intermodulation detection circuit is electrically connected with duplexer receiving port, and the output end of passive intermodulation detection circuit is electrically connected with the input terminal of digital processing element；The emitted signal frequency detecting circuit of digital processing element is electrically connected with transmit circuit unit, and the output end of digital processing element is electrically connected with the input terminal of passive intermodulation detection circuit, transmit circuit unit and Canceller circuit respectively；The output end of transmit circuit unit is electrically connected with the input terminal of the duplexer.Wireless transmitting-receiving equipments and the device antenna mouth to the passive intermodulation signal that this section of chain road other equipment of antenna or component generate can be dropped into the component counteracting for receiving frequency range by the present invention.

Description

A kind of devices and methods therefor of adaptive cancellation passive intermodulation signal
Technical field
The present invention relates to wireless communication fields.Specifically, the present invention relates to a kind of adaptive cancellation passive intermodulation signals Devices and methods therefor.
Background technique
In a communications system, wireless transmitting-receiving equipments are widely applied.Wireless transmitting-receiving equipments itself include generation passive intermodulation Device of signal, such as radio frequency duplexer, filter, combiner etc.；Chain road from wireless transmitting-receiving equipments antenna opening to antenna Also comprising many devices, such as coupler, radio-frequency cable, tower amplifier etc. for generating passive intermodulation signal.For wirelessly receiving For hair system, how to inhibit as emitting caused by signal in wireless transceiver system to the receiver generation of wireless transmitting-receiving equipments Intermodulation Interference is always the critical issue of such system.It is therefore desirable to which wireless transmitting-receiving equipments are at work, transmission channel is generated Passive intermodulation signal level it is as low as possible, in order to avoid passive intermodulation signal falls into receiving channel, mutual cadre enrolled among workers is caused to receiving channel It disturbs.Generally there are two types of modes for current passive intermodulation cancellation technology:
Documents CN100490307C discloses a kind of title are as follows: " signal processing circuit, base station and elimination intermodulation product Method " patent of invention, which is divided into two-way for the primary carrier of unbalanced input unit, input two branches respectively, first Road primary carrier passes through the processing signal that non-linear unit generation includes first group of intermodulation product, and the second road primary carrier passes through branch Device, frequency multiplier, mixer and adjusting circuit.The control signal containing second group of high order intermodulation product is generated, finally by two-way Signal averaging.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 phase Instead, inter-modulated signal is offset.
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 to transmit signal it will be apparent that in passive circuit Amplitude fading and phase change degree it is very big.In the case where multiple positions generate intermodulation, the intermodulation of circuit front-end generation Signal can significantly decay in signals transmission, and the inter-modulated signal of circuit output contains only the intermodulation letter of circuit end generation Number, therefore, for duplexer, if from the front end number of winning the confidence of non-linear unit, generated intermodulation offseting signal can not be with The inter-modulated signal of antenna port offsets；2, the intermodulation offseting signal i.e. second group high order intermodulation product that the technical solution generates, It is defined as fixed order and obtains intermodulation product, the inter-modulated signal of the non-linear unit in corresponding frequency band can only be eliminated, there is limitation Property.
Documents 201310048951.1 disclose a kind of title are as follows: a kind of " intermodulation counteracting dress for passive device Set " patent of invention, which includes the transmitting signal of high order intermodulation product from passive device output end direct-coupling, passes through nothing After the adjustment of source adjuster is transmitted to the radio frequency link end reflection with inter-modulated signal generator, again by passive regulator Adjustment, obtain the offseting signal with the aforesaid passive device transmitting inter-modulated signal identical frequency of signal, level and opposite phase, The signal emits Signal averaging by coupler and Passive Nonlinear unit output end, realizes that intermodulation is offset.
The technical solution is in following deficiency: 1, the technical solution uses passive regulator, and amplitude adjusted, phase adjusted are Passive device, if to realize that amplitude adjusted, phase adjusted needs are driven by outer power drive passive regulator, such as using motor It is dynamic, or directly manually drive, these modes can make practical application at high cost, and be not easy to commercialization；2, due to not having The feedback sense circuit of passive intermodulation offset result, offset result cannot be monitored in real time and be adjusted.
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 will increase pollution.
Summary of the invention
An object of the present invention is to provide a kind of digital adaptation in order to overcome above-mentioned background technique insufficient, be used for The device of the passive intermodulation signal in wireless transceiver system is offset, it can be by wireless transmitting-receiving equipments and the device antenna mouth extremely The passive intermodulation signal that this section of chain road other equipment of antenna or component generate drops into the component counteracting for receiving frequency range.
The present invention provides a kind of devices of adaptive cancellation passive intermodulation signal, it is characterised in that: it includes the first coupling Clutch, Canceller circuit, the second coupler, passive intermodulation detection circuit, digital processing element, duplexer, transmit circuit unit, Antenna feeder component, antenna；One primary path port of first coupler is connect with the antenna opening of the duplexer, another master Access port is connect with the antenna feeder component in antenna link, the coupling port of the first coupler and a radio frequency of Canceller circuit Port connection；One primary path port of the second coupler is connect with duplexer receiving port, another primary path port and nothing The connection of source intermodulation detection circuit, the coupling port of the second coupler are connected with another prevention at radio-frequency port of Canceller circuit；It is passive The output end of intermodulation detection circuit is electrically connected with the input terminal of digital processing element, the emitted signal frequency discrimination electricity of digital processing element Road is electrically connected with transmit circuit unit, the output end of digital processing element respectively with passive intermodulation detection circuit, transmit circuit list The input terminal of member and Canceller circuit is electrically connected；The output end of transmit circuit unit is electrically connected with the input terminal of the duplexer；
The signal greater than a certain radio-frequency power value of the transmit circuit unit produces the duplexer and its antenna link Raw passive intermodulation signal, and fall with that duplexer receives frequency range in the passive intermodulation signal and have centainly with signal is received The component of frequency interval；
The chain road coupled RF signal of antenna opening of first coupler from duplexer, which exports, gives Canceller circuit；Institute It states in radiofrequency signal comprising transmitting signal, passive intermodulation signal and reception signal；One primary path end of first coupler Mouth is connect with the antenna opening of the duplexer, another primary path port is connect with the antenna feeder component in antenna link, the first coupling The coupling port of clutch is connected with a prevention at radio-frequency port of Canceller circuit；What second coupler generated Canceller circuit Intermodulation offseting signal is superimposed upon the chain road after duplexer receiving port, a primary path port of the second coupler and duplexer Receiving port connection, and apart from that need to control within the scope of 0 to 1 meter, specific length is offset optimum efficiency by passive intermodulation and is determined, should Primary path port is the first primary path port, another primary path port and passive intermodulation detection circuit are connected as the second primary path Port, the coupling port of the second coupler are connected with another prevention at radio-frequency port of Canceller circuit；
It is coupled to the power for receiving signal and passive intermodulation signal in the radiofrequency signal of Canceller circuit in Canceller electricity The inter-modulated signal that road generates, amplitude adjusted and phase adjustment, the primary path of coupling output to the second coupler, formation and institute It states and falls into receiving frequency range in passive intermodulation signal and have that the component frequencies at certain frequency interval are identical, amplitude phase with signal is received Same and opposite in phase intermodulation offseting signal,
The prevention at radio-frequency port of the passive intermodulation detection circuit and the second master of the second coupler after duplexer receiving port Access port connection falls into the component of reception frequency range, the passive intermodulation detection electricity to obtain reception signal and passive intermodulation signal The reception dynamic range on road is greater than between performance number corresponding to the maximum power value and passive intermodulation preset value for receiving signal Difference；Passive intermodulation detection circuit is connect by high-speed AD converter with the digital processing element, high-speed AD converter Sampling rate more than or equal to 2 times duplexer receive band bandwidth；
The digital processing element is calculated according to the sampled data of emission signal frequency information and passive intermodulation detection circuit It obtains the detected amplitude of passive intermodulation signal and is compared with passive intermodulation preset value；When the detected amplitude is greater than described pre- If when value, controlling the Canceller circuit and generating point for falling into reception frequency range in intermodulation offseting signal and the passive intermodulation signal Amount is offset, and this detected amplitude according to passive intermodulation signal is kept to make to fall into reception frequency range in passive intermodulation signal The offset result of component is less than or equal to the working condition of the preset value；The digital processing element passes through multi-channel digital and analogue converter With Canceller circuit connection, amplitude, the control amount of phase are passed into Canceller circuit, the amplitude adjustment of the Canceller circuit The requirement of precision and phase adjustment precision is mainly derived from passive intermodulation signal cancellation ability need.
In above-mentioned technical proposal, the duplexer in described device represents the passive device in wireless transmitting-receiving equipments；The day Feedback component and antenna represent the passive device in the antenna link of wireless transceiver system, in the antenna feeder component representative antennas link The combination of single or multiple passive devices, these passive devices include but is not limited to cable, connector, coupler, combiner.
In above-mentioned technical proposal, the transmitting signal in the Canceller circuit radiofrequency signal is input to through RF switch, is adjusted Produce that identical as the passive intermodulation signal frequency, amplitude is different after width circuit, circulator and the processing of inter-modulated signal generator The inter-modulated signal different with phase, and fallen into the inter-modulated signal receive frequency range single 3 order component or single 5 order component or 5 order components or multiple and different of 3 order components or multiple and different frequency points of single higher order component of degree n n or multiple and different frequency points The higher order component of degree n n of frequency point, or have simultaneously amplitude relation between the even higher order component of 3 order components, 5 order components and Single 3 rank point for receiving frequency range is fallen into the passive intermodulation signal that phase relation and the duplexer and its antenna link generate 3 order components or multiple and different frequency points of amount or single 5 order component or single higher order component of degree n n or multiple and different frequency points 5 order components or multiple and different frequency points higher order component of degree n n, or have 3 order components, the even higher order of 5 order components simultaneously Magnitude relation and phase relation between component is almost the same；
And it is coupled to the power for receiving signal and passive intermodulation signal in the radiofrequency signal of Canceller circuit described mutual It adjusts the amplitude of the inter-modulated signal generated on signal generator to be much smaller than the amplitude of above-mentioned passive intermodulation signal, passive intermodulation is not supported The result that disappears has an impact；
Again by circulator after the inter-modulated signal reflection, through filter, and the amplitude of amplitude modulated phase modulation 1 adjusts and phase Position adjustment, coupling output to the second coupler primary path, formed with the passive intermodulation signal in fall into receive frequency range and Have that the component frequencies at certain frequency interval are identical, amplitude is identical and the intermodulation offseting signal of opposite in phase with signal is received, this is mutually The component for falling into reception frequency range in offseting signal and the passive intermodulation signal is adjusted to be offset, the passive intermodulation signal after counteracting Less than or equal to passive intermodulation preset value；Simultaneously duplexer and its transmitting signal in antenna link and receive signal in duplexer and Normal operation in its antenna link.
In above-mentioned technical proposal, the digital processing element is as follows according to emission signal frequency information calculation method:
The digital processing element is first depending on emission signal frequency information, calculates associated passive intermodulation signal Frequency information, and be converted into the filtering parameter of passive intermodulation signal, then according to receive signal frequency, bandwidth information with Passive intermodulation signal frequency, bandwidth information acquire the frequency interval between them, the corresponding digital filtering mode of reselection and product The mode of dividing, the final amplitude detection realized to passive intermodulation signal；Then by the detected amplitude and nothing of the passive intermodulation signal Source intermodulation preset value compares；
When the detected amplitude is less than or equal to the preset value, the Canceller circuit does not generate intermodulation offseting signal, The passive intermodulation index of the duplexer and its antenna link is not had an impact；
When the detected amplitude is greater than the preset value, adjustment of the Canceller circuit to its amplitude and phase is controlled Produce that, amplitude identical as the passive intermodulation signal frequency of the duplexer and its antenna link be identical and the intermodulation of opposite in phase Offseting signal is offset with the passive intermodulation signal in the radiofrequency signal, and keeps this width according to passive intermodulation signal It is described that Canceller circuit amplitude described in value testing result real-time monitoring and phase are less than or equal to passive intermodulation signal cancellation result The working condition of preset value.
In above-mentioned technical proposal, the digital processing element is electric by the transmitting of transmitting signal frequency detecting circuit from described device Transmitting signal is obtained on the unit of road, is converted to digital signal, and input digital processing element carries out frequency discrimination processing, obtains associated transmissions Signal frequency information, and by transmitting signal and receive the correspondingly received signal frequency letter of duplex frequency separation reckoning between signal Breath；Or it is directly obtained from the input information of the device by the information interactive interface in digital processing element；At the number Reason unit generates trigger signal and exports to transmit circuit unit to trigger transmit circuit unit generation radiofrequency signal.
In above-mentioned technical proposal, the duplexer and its antenna link is motivated to generate signal and the excitation of passive intermodulation signal The inter-modulated signal generator generate inter-modulated signal signal be it is homologous, derive from the transmitting signal of transmit circuit unit, So the frequency for the inter-modulated signal that the passive intermodulation signal of passive device generation and inter-modulated signal generator generate is identical, bandwidth phase Together；The antenna link is this section of link from diplexer antenna mouth to antenna, single in the antenna feeder component representative antennas link Or the combination of multiple passive devices, these passive devices include but is not limited to cable, connector, coupler, combiner；The hair Signal is penetrated to be made of multi-tone signal or be made of multicarrier modulated signal.
In above-mentioned technical proposal, when the duplexer or antenna feeder component or antenna individually generate or multiple passive devices it is same When generate and what is be formed by stacking only has single 3 rank or single with receiving signal and have in the passive intermodulation signal at certain frequency interval A 5 rank or single higher order component of degree n n fall into the frequency acceptance band of duplexer and cause to test from duplexer receiving port passive mutual When adjusting index that preset value requirement is not achieved, for the second primary path port for making the second coupler after the duplexer receiving port Passive intermodulation value afterwards meets preset value requirement: the intermodulation offseting signal that the inter-modulated signal generator can be generated is most Amplitude is greater than the list for dropping into the duplexer and its passive intermodulation signal of antenna link and receiving frequency range respective frequencies The amplitude of a component；
When the duplexer or antenna feeder component or antenna individually generate or multiple passive devices at the same generate and be superimposed and At with receive signal and have in the passive intermodulation signal at certain frequency interval only 3 ranks of multiple and different frequencies or multiple and different 5 ranks of frequency or the higher order component of degree n n of multiple and different frequencies fall into the frequency acceptance band of duplexer and cause from duplexer receiving end When preset value requirement is not achieved in the passive intermodulation index of mouth test, to make the second coupler after the duplexer receiving port Passive intermodulation value behind second primary path port meets preset value requirement: the correspondence nothing that the inter-modulated signal generator can be generated The maximum amplitude of the intermodulation offseting signal of source intermodulation component frequency is greater than the passive intermodulation of the duplexer and its antenna link The amplitude for receiving multiple respective frequencies components of frequency range is dropped into signal；The intermodulation letter generated on the inter-modulated signal generator The passive intermodulation signal that phase relation and the duplexer and its antenna link in number between multiple specific order components generate In phase relation between multiple specific order components it is almost the same；
When the duplexer or antenna feeder component or antenna individually generate or multiple passive devices at the same generate and be superimposed and At with receive signal and have in the passive intermodulation signal at certain frequency interval that have 3 ranks, 5 ranks or higher order component of degree n n to fall into simultaneously double The frequency acceptance band of work device and all cause from duplexer receiving port test passive intermodulation index preset value requirement is not achieved when, be Passive intermodulation value behind second primary path port of the second coupler after making the duplexer receiving port meets preset value and wants It asks；The intermodulation offseting signal for the correspondence passive intermodulation component frequencies that the inter-modulated signal generator can be generated most substantially Value, which is greater than, drops into the multiple respective frequencies point for receiving frequency range in the duplexer and its passive intermodulation signal of antenna link The amplitude of amount；Amplitude relation in the inter-modulated signal generated on the inter-modulated signal generator 2 between multiple specific order components And in phase relation and the duplexer and its passive intermodulation signal of antenna link generation between multiple specific order components Magnitude relation and phase relation are almost the same.
In above-mentioned technical proposal, when the radiofrequency signal in passive intermodulation detection circuit is excessive causes link obstructions, number Processing unit, which normally handles the link gain for reducing passive intermodulation detection circuit, to be received signal and stops detecting passive mutual Adjust signal amplitude；When passive intermodulation detection circuit is not blocked, the digital processing element is carrying out passive intermodulation crest meter During calculation, to be treated includes passive intermodulation signal and reception signal in the signal of passive intermodulation detection circuit And there is certain frequency interval between passive intermodulation signal and reception signal.
In above-mentioned technical proposal, the method for the digital processing element calculating passive intermodulation signal amplitude are as follows:
Digital processing element is first depending on the frequency that emission signal frequency information calculates associated passive intermodulation signal Then rate information acquires between them according to reception signal frequency, bandwidth information and passive intermodulation signal frequency, bandwidth information Frequency interval, and select suitable algorithm to calculate passive intermodulation signal amplitude according to the frequency interval；
The algorithm for calculating passive intermodulation signal amplitude is including but not limited to direct filter integration method and region filtering product Point-score:
The direct filter integration method, which refers to filter and integrate according to passive intermodulation signal bandwidth Direct Digital, seeks amplitude, this The frequency interval that Shi Suoshu passive intermodulation signal drops into each order component for receiving frequency range and receives between signal is greater than To the intermediate zone bandwidth of stopband, this frequency interval is digital filter passband in the digital filtering algorithm of passive intermodulation signal Using the foundation of direct filter integration method；
The region filtering integration method refers to that passive intermodulation signal bandwidth is divided into several subbands is wide, wide according to each subband It carries out digital filtering and integrates amplitude of asking, then the corresponding amplitude of all subband width is subjected to the cumulative entire signal amplitude of acquisition, this Each order component of Shi Suoshu and the frequency interval received between signal are greater than the number equal to each order component side subband signal For filter passband to the intermediate zone bandwidth of stopband, this frequency interval is the foundation using region filtering integration method.
In above-mentioned technical proposal, after a port of the Canceller circuit is by the first coupler and diplexer antenna mouth Antenna link connection, or pass through the transmitting link connection before the first coupler and duplexer emission port；The Canceller Another port of circuit passes through the link connection after the second coupler and duplexer receiving port；The of second coupler One primary path port connect with duplexer receiving port and connects distance and need to control within the scope of 0 to 1 meter, and specific length is by passive Intermodulation is offset optimum efficiency and is determined, the rf inputs of second coupler the second primary path port and passive intermodulation detection circuit connect It connects, the coupling port of the second coupler connects Canceller circuit；The coupling port of first coupler is positive relative to transmitting signal To coupling port；The load power of first coupler need to be greater than the maximum transmission power peak value of the device, the band of the first coupler Width need to be comprising emitting frequency range, and gain fluctuation is related to transmitting frequency range in the frequency band of the first coupler and need to be in certain threshold value model In enclosing；The passive intermodulation index of first coupler meets the passive intermodulation index request to antenna feeder component；The coupling of second coupler It is reverse coupled port that port, which is closed, relative to signal is received；The bandwidth of second coupler need to be comprising receiving frequency range, the second coupler Frequency band in gain fluctuation to receive frequency range related and need to be within the scope of certain threshold value；The carrying function of the Canceller circuit Rate threshold value need to be more than or equal to the difference of the power threshold of the first coupler and the degree of coupling of the first coupler；To make Canceller Inter-modulated signal generator can generate passive intermodulation offseting signal in circuit, load the transmitting signal power in the Canceller circuit Minimum value need to be greater than certain power threshold.
In above-mentioned technical proposal, passive intermodulation detection circuit includes low-noise amplifier, down conversion module, high speed analog-digital conversion turn Parallel operation, the input terminal of noise amplifier are electrically connected with the receiving port of duplexer, the downconverted mould of the output end of noise amplifier Block is electrically connected with the input terminal of high-speed AD converter, the output end of high-speed AD converter and the input terminal of digital processing element Electrical connection；
The gain of the passive intermodulation detection circuit is by high in the passive intermodulation preset value of demand, passive intermodulation detection circuit The minimum sampled power of fast analog-digital converter, chain noise factor etc. determine；The reception signal of the passive intermodulation detection circuit The maximum value of power is more than or equal to the maximum receiving signal power of the practical corresponding communication standard defined of the device.
In above-mentioned technical proposal, the digital processing element has at least one information interactive interface, effect include but It is not limited to program downloading, configuration information input, remote alarm and maintenance；The configuration information for wherein needing to input includes present apparatus hair 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 Information, passive intermodulation signal preset value and the curve changed over time, maximum counteracting number；The digital processing element can be with Emission signal frequency information is obtained by information interactive interface and receives signal frequency information；The information interactive interface may be used also To carry out data interaction with internet backstage resource: uploading the passive intermodulation value in the equipment running process, passive intermodulation value The status information of each modular circuit in the experience curve and passive intermodulation signal adaptive canceller changed over time；Or Person downloads the passive intermodulation signal preset value after complex optimum and the curve that changes over time；
At least there are two interfaces between the digital processing element and passive intermodulation detection circuit: an interface, which acts on, is The sampled signal for obtaining passive intermodulation detection circuit high speed analog-digital converter, to carry out the digital filtering of passive intermodulation signal It is calculated with amplitude；The effect of another interface is the parameter by bus configuration passive intermodulation detection circuit；
When the method that the digital processing element obtains the emission signal frequency information and receives signal frequency information is When using transmitting signal frequency detecting circuit, then emit transmitting chain in the prevention at radio-frequency port and the transmit circuit unit of signal frequency detecting circuit The somewhere of road connects, and transmitting signal frequency detecting circuit is connect by high-speed AD converter with the digital processing element；Simultaneously There are one interface between digital processing element and transmitting signal frequency detecting circuit, effect is to emit signal frequency discrimination by bus configuration Parameter of circuit, such as local frequency, link gain etc., the bus include but is not limited to I2C bus, spi bus；
The digital processing element has at least one information interactive interface, and effect is downloaded including but not limited to program, Configuration information input, remote alarm and maintenance；The configuration information for wherein needing to input includes present apparatus transmitted signal bandwidth and frequency Section, the order and band information, passive intermodulation letter for receiving signal bandwidth and frequency range, dominant interference component in passive intermodulation signal Number preset value and the curve changed over time maximum offset number；The digital processing element can be connect by information exchange Mouth obtains emission signal frequency information and receives signal frequency information；The information interactive interface can also be with internet backstage Resource carries out data interaction: uploading the passive intermodulation value in the equipment running process, the warp that passive intermodulation value changes over time Test the status information of each modular circuit in curve and passive intermodulation signal adaptive canceller；Or downloading complex optimum It rear passive intermodulation signal preset value and changes over time；
The digital processing element includes at least the logical process and calculation process device for having digital signal processing function, For the reception of digital signal, algorithm process, the output of digital signal, control and the output for configuring signal etc., at the logic Reason is with calculation process device including but not limited to Field Programmable Gate Array Devices, central processing unit, digital signal processor；Institute It includes but is not limited to Ethernet interface, optical fiber interface, RS-485 that the hardware for stating the information interactive interface of digital processing element, which is constituted, Bus interface；The digit range of digital analog converter in the digital processing element is between 10~18, and at least 3 numbers Mode converter.
In above-mentioned technical proposal, modulation circuit one end in the Canceller circuit is directly connected to the coupling of the first coupler Port, or the coupling port by RF switch the first coupler of connection；The other end connects inter-modulated signal hair by circulator Raw device；Inter-modulated signal generator connects filter by circulator, and amplitude modulation and phase modulation device one end connects filter 5, other end connection The coupling port of second coupler.
In above-mentioned technical proposal, modulation circuit one end in the Canceller circuit is directly connected to the coupling of the first coupler Port, or the coupling port by RF switch the first coupler of connection；The other end connects inter-modulated signal hair by circulator Raw device；Inter-modulated signal generator connects amplitude modulation and phase modulation device by circulator, and one end of filter connects amplitude modulation and phase modulation device, the other end Connect the coupling port of the second coupler.
In above-mentioned technical proposal, the amplitude modulation and phase modulation device is made of modulation circuit and phase modulation circuit；Modulation circuit at least wraps Containing 1 controllable attenuator；Phase modulation circuit includes at least 2 controllable phase shifters；Modulation circuit is by fixed attenuator or adjustable Attenuator is controlled to constitute；The frequency bandwidth of the circulator includes the transmitting frequency range and reception frequency range of the duplexer；The amplitude modulation The working frequency range of phase converter includes the reception frequency range of the duplexer, gain fluctuation and reception frequency range in the frequency band of amplitude modulation and phase modulation device It is related and need to be within the scope of certain threshold value；The passband frequency range of the filter is the reception frequency range of duplexer, and filter Out-of-band rejection index request be that the Out-of-band rejection index of frequency range, the first coupler degree of coupling, the second coupling are received by duplexer The first coupler coupled end is determined to link load etc. between the second coupler coupled end in the device degree of coupling, Canceller circuit；Institute The load power for stating modulation circuit in Canceller circuit is more than or equal to the load power threshold value of the Canceller circuit；
Parallel connection of the inter-modulated signal generator including but not limited to single diode, single triode or multiple diodes It constitutes；Diode concrete model or triode concrete model and generation 3 rank of inter-modulated signal, 5 ranks or higher order inter-modulated signal Amplitude characteristic is related to phase characteristic, and the demand of the amplitude characteristic and phase characteristic is the requirement to inter-modulated signal generator； When using multiple same model diodes in parallel structures, inter-modulated signal intensity will be enhanced；The load power of inter-modulated signal generator is big In equal to the Canceller circuit load power threshold value and from Canceller circuit rf input port to inter-modulated signal generator The difference of link load.
In above-mentioned technical proposal, the passive intermodulation detection circuit includes at least low-noise amplifier, down conversion module, height Fast analog-digital converter；The passive intermodulation detection circuit is connect by high-speed AD converter with the digital processing element；
Received radiofrequency signal can be converted into intermediate-freuqncy signal by down conversion module, or received radiofrequency signal is converted At zero intermediate frequency signals；The sampling dynamic range of high-speed AD converter need to be greater than the maximum power value and passive intermodulation for receiving signal Difference between the corresponding performance number of preset value；
The minimum power that the passive intermodulation detection circuit can sample is less than or equal to the corresponding passive intermodulation function of preset value Rate value, at the same the circuit can according to received radiofrequency signal general power range-adjusting link gain to avoid receive believe Number or other signals caused by link obstructions；The gain of the passive intermodulation detection circuit by demand passive intermodulation preset value, Minimum sampled power, the chain noise factor of passive intermodulation detection circuit high speed analog-digital converter determine；The passive intermodulation The maximum that the maximum value of the received signal power of detection circuit is more than or equal to the practical corresponding communication standard defined of the device connects Receive signal power.
In above-mentioned technical proposal, passive intermodulation detection circuit includes the low-noise amplifier being sequentially connected electrically, rf filtering And low level signal amplification unit, frequency mixer, intermediate-frequency filter, intermediate frequency amplifier, analog-digital converter, local oscillator are electrically connected with frequency mixer It connects；The input terminal of low-noise amplifier is electrically connected with the output end of duplexer；The output end and digital processing list of analog-digital converter The input terminal electrical connection of member.
In above-mentioned technical proposal, passive intermodulation detection circuit includes the low-noise amplifier being sequentially connected electrically, rf filtering And low level signal amplification unit and down coversion and AD conversion unit；The input terminal of low-noise amplifier and the output end electricity of duplexer Connection；The output end of down coversion and AD conversion unit is electrically connected with the input terminal of digital processing element.
The present invention provides a kind of wireless transmitting-receiving equipments, the device including the adaptive cancellation passive intermodulation signal, The duplexer of the device of the adaptive cancellation passive intermodulation signal is the duplexer of wireless transmitting-receiving equipments；Described in the present apparatus Adaptive cancellation passive intermodulation signal device passive intermodulation detection circuit multiplexing wireless transmitting-receiving equipments receives link Component or unit, or increase passive intermodulation detection circuit newly in the wireless transmitting-receiving equipments；The adaptive cancellation is passive The component or unit of the transmitting link of the unit multiplexed wireless transmitting-receiving equipments of the transmit circuit of the device of inter-modulated signal；Described is adaptive Should offset the device of passive intermodulation signal digital processing element multiplexing wireless transmitting-receiving equipments digital processing element component or Unit, or increase digital processing element newly in the wireless transmitting-receiving equipments, the digital processing element will be integrated in wireless receipts In the complete machine program for sending out equipment；First coupler of the device of the adaptive cancellation passive intermodulation signal need to be described wireless It is increased newly in transceiver, and one primary path port is connected with the diplexer antenna mouth of wireless transmitting-receiving equipments or one Primary path port is connected with the duplexer emission port of wireless transmitting-receiving equipments, and the coupling port of the first coupler is relative to the nothing It is positive coupling port that line transceiver, which emits signal,；Second coupling of the device of the adaptive cancellation passive intermodulation signal Device need to increase newly in the wireless transmitting-receiving equipments, and the duplexer receiving port of one primary path port and wireless transmitting-receiving equipments connects It connects and apart from need to control within the scope of 0 to 1 meter, specific length is offset optimum efficiency by passive intermodulation and determined, the second coupler It is reverse coupled port that coupling port, which receives signal relative to the wireless transmitting-receiving equipments,；The adaptive cancellation passive intermodulation The Canceller circuit of the device of signal need to increase newly in the wireless transmitting-receiving equipments, and one rf inputs mouth and the first coupling The coupling port of clutch is directly connected to, and the coupling port of another radio frequency output port and the second coupler is directly connected to, and is supported Disappear device circuit amplitude adjustment and phase adjustment exported by digital processing element operation amplitude, phase controlling parameter realize；Institute The antenna feeder component and antenna of the device for the adaptive cancellation passive intermodulation signal stated are the antenna chain of the wireless transmitting-receiving equipments The correspondence component and antenna of road；
When wireless transmitting-receiving equipments have multiple receiving-transmitting chains, duplexer is both needed to a set of first in each receiving-transmitting chain Coupler, the second coupler and Canceller circuit.
The present invention provides a kind of method of passive intermodulation signal in adaptive cancellation wireless transceiver system, feature exists In: this approach includes the following steps,
S1: transmitted signal bandwidth and frequency range are obtained by digital processing element, receive signal bandwidth and frequency range, passive intermodulation The order and band information of dominant interference component in signal, desired passive intermodulation preset value and the song changed over time The information such as line, the initial experience data of amplitude and phase, maximum counteracting number, and it is converted into corresponding configuration parameter；
S2: according to the configuration parameter in step S1 in relation to emitting signal, digital processing element acquires passive intermodulation signal Frequency point is simultaneously converted into respective digital filtering parameter and is stored into parameter allocation list；
S3: according to the configuration parameter of reception signal related in step S1, the configuration parameter of passive intermodulation signal and by step The digital filter parameters of the passive intermodulation signal obtained in rapid S2, digital processing element believe the sampling of passive intermodulation detection circuit Number carry out digital filtering, filter out other signal components in addition to passive intermodulation signal, acquire drop into receive frequency range it is passive The range value of inter-modulated signal；The algorithm for seeking range value include but is not limited to sectional integration method, basis signal bandwidth it is direct Integration method；
S4: judge current working status；The status indicator default value of the working condition is: " initial operation mode "；Such as The status indicator value of fruit working condition is that " initial operation mode " then continues step S5-1, otherwise continues step S5-2；
S5-1: the passive intermodulation preset value in passive intermodulation signal amplitude value that step S3 is obtained and step S1 is carried out pair Than to judge passive intermodulation preset value that whether passive intermodulation signal amplitude is less than or equal to；
S6: if the judging result of step S5-1 be "Yes", Canceller circuit continue keep inter-modulated signal generator with Link high-isolation state between first coupler；And return step S2；
S7: if the judging result of step S5-1 is "No", Canceller circuit is switched to inter-modulated signal generator and the The low isolation state of link between one coupler；And by the status indicator value of working condition and it is set as " offsetting working condition "； Continue to execute step S8；
S5-2: the passive intermodulation preset value in passive intermodulation signal amplitude value that step S3 is obtained and step S1 is carried out pair Than to judge passive intermodulation preset value that whether passive intermodulation signal amplitude is less than or equal to；If the judging result of step S5-2 is "Yes", then hold mode, and return step S2；If the judging result of step S5-2 is "No", S8 is thened follow the steps；
S8: the range value of the passive intermodulation signal according to step S3 calculates the amplitude of Canceller circuit, phase adjustment value；And Modulator, the phase converter being distributed in Canceller circuit are implemented to offset；It completes to continue back after previous round counteracting processing Continue the counteracting processing of next round to step S2；It is described to ask amplitude, the algorithm including but not limited to two dimension of phase adjustment value minimum Variance algorithm.
Chain after passive intermodulation signal and wireless transmitting-receiving equipments antenna opening that the present invention can generate wireless transmitting-receiving equipments The passive intermodulation signal that any one equipment or component generate in road drops into the component for receiving frequency range in wireless transmitting-receiving equipments Radio frequency link on offset, and obtained in the receiving port of the passive device and require index better than scheduled passive intermodulation As a result.The present invention can be reduced in the case where keeping the constant situation of system passive intermodulation index to device each in wireless transceiver system Passive intermodulation index request, to reduce the manufacturing cost of each passive device.The present invention can also be used to eliminate due to double The influence that the passive intermodulation index that the component or antenna occur with working time growth on work device or its antenna link deteriorates, To extend the life cycle of the wireless transceiver system.The present invention can also need more preferable passive intermodulation index in the system When, promote the index to preset value or more.When the passive intermodulation of the duplexer and its antenna link that carry out wireless transmitting-receiving equipments supports Disappear and the duplexer receiving port obtain be better than scheduled passive intermodulation requirement index result when, the present invention will not be to hair It penetrates linearly performance and receives linearly performance and generate adverse effect.Since present invention employs active intermodulation to offset electricity Road quantifies the tune of signal phase, amplitude, improves Adjustment precision and accuracy.Since present invention employs passive mutual The feedback link for adjusting signal cancellation effect, allows passive intermodulation signal cancellation effect by real-time monitoring and adaptive dynamic Adjustment, so as to when the power grade by the signal on the passive device or following link, working frequency change, with And environment temperature etc. is when changing, can dynamic, real-time response, so that passive intermodulation signal cancellation result is met target Value.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the device of the first adaptive cancellation passive intermodulation signal of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of second of position of the first coupler A in the device of that embodiment of the invention.
Fig. 3 is the super-heterodyne architecture schematic diagram of passive intermodulation detection circuit D in the embodiment of the present invention.
Fig. 4 is the reception zero-if architecture schematic diagram of passive intermodulation detection circuit D in the embodiment of the present invention.
In Fig. 5 embodiment of the present invention in a kind of adaptive cancellation wireless transceiver system the method for passive intermodulation signal process Figure.
Table 1 is that a passive intermodulation of the device of that embodiment of the invention offsets test record.
Fig. 6 is the neutralization effect figure of 3 order component of the device of that embodiment of the invention.
Fig. 7 is the neutralization effect figure of 5 order components of the device of that embodiment of the invention after the counteracting of 3 order components.
Fig. 8 is a kind of knot of the wireless transmitting-receiving equipments with adaptive cancellation passive intermodulation semiotic function of the embodiment of the present invention Structure schematic diagram.
Fig. 9 is the neutralization effect figure for 3 order components that the embodiment of the present invention is applied to after wireless transmitting-receiving equipments.
Figure 10 is the embodiment of the present invention for not opening dual carrier when passive intermodulation cancel function after wireless transmitting-receiving equipments Emit low frequency point signal ACPR test result figure in signal.
Figure 11 is the embodiment of the present invention for not opening dual carrier when passive intermodulation cancel function after wireless transmitting-receiving equipments Emit signal medium-high frequency point signal ACPR test result figure.
Figure 12 is the embodiment of the present invention for opening dual carrier hair when passive intermodulation cancel function after wireless transmitting-receiving equipments Penetrate low frequency point signal ACPR test result figure in signal.
Figure 13 is the embodiment of the present invention for opening dual carrier hair when passive intermodulation cancel function after wireless transmitting-receiving equipments Penetrate signal medium-high frequency point signal ACPR test result figure.
When Figure 14 is the embodiment of the present invention for not opening passive intermodulation cancel function after wireless transmitting-receiving equipments, then it will receive Signal is looped back to low frequency point signal EVM test result figure when transmitting chain road.
When Figure 15 is the embodiment of the present invention for not opening passive intermodulation cancel function after wireless transmitting-receiving equipments, then it will receive Signal is looped back to high frequency points signal EVM test result figure when transmitting chain road.
When Figure 16 is the embodiment of the present invention for opening passive intermodulation cancel function after wireless transmitting-receiving equipments, then believe receiving Number it is looped back to low frequency point signal EVM test result figure when transmitting link.
When Figure 17 is the embodiment of the present invention for opening passive intermodulation cancel function after wireless transmitting-receiving equipments, then believe receiving Number it is looped back to high frequency points signal EVM test result figure when transmitting link.
Figure 18 is a kind of structural representation of the wireless discharging-directly station of energy adaptive cancellation passive intermodulation signal of the embodiment of the present invention Figure.
Figure 19 is that a kind of structure of the microwave transmitting and receiving equipment of energy adaptive cancellation passive intermodulation signal of the embodiment of the present invention is shown It is intended to.
Figure 20 is the schematic diagram that wireless transmitting-receiving equipments and multiple receiving-transmitting chains use one of example in the embodiment of the present invention.
Figure 21 is that there are wireless transmitting-receiving equipments multiple receiving-transmitting chains to use the schematic diagram of one of example in the embodiment of the present invention.
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments, convenient for this hair is well understood It is bright, but they limiting the invention.
As shown in Figure 1, it includes the first coupler the present invention relates to a kind of device of adaptive cancellation passive intermodulation signal A, Canceller circuit B, the second coupler B5, passive intermodulation detection circuit D, digital processing element E, duplexer A0, transmit circuit Unit F, antenna feeder component A2, antenna A1；Duplexer A0 in described device represents the passive device in wireless transmitting-receiving equipments；It is described Antenna feeder component A2 and antenna A1 represents the passive device in the antenna link of wireless transceiver system, and the antenna feeder component A2 represents day The combination of single or multiple passive devices in wired link, these passive devices include but is not limited to cable, connector, coupler, Combiner.
Transmit circuit unit F receives the control signal from digital processing element E, sends transmitting signal, the transmitting electricity The transmitting signal greater than a certain radio-frequency power value of road unit F makes the duplexer A0 and its antenna link generate passive intermodulation letter Number；The transmitting signal is made of multi-tone signal or is made of multicarrier modulated signal.In the present embodiment, the transmit circuit The signal greater than 40dBm of unit F makes antenna feeder component A2 and antenna A1 in the duplexer A0 and its antenna link generate nothing Source inter-modulated signal, and fallen in the passive intermodulation signal duplexer A0 receive frequency range and with receive signal have certain frequency The component at rate interval, the different configurations according to transmitting signal can make the passive intermodulation signal fall into duplexer A0 reception frequency range Component include single 3 order component or single 5 order component, even or individually 3 rank of higher order component of degree n n or multiple and different frequencies 5 order component of component or multiple and different frequencies, even or the higher order component of degree n n of multiple and different frequencies or have simultaneously 3 order components and 5 order components even high-order component of degree n n；In the present embodiment, transmitting frequency range is 925MHz to 960MHz, receives frequency range and arrives for 880MHz 915MHz；
The chain road coupled RF signal of antenna opening of the first coupler A from duplexer A0, which exports, gives Canceller circuit B；Include transmitting signal, passive intermodulation signal and reception signal in the radiofrequency signal；A master of the first coupler A is logical The antenna opening of road port and the duplexer A0 is directly connected to, the antenna feeder component A2 in another primary path port and antenna link Connection, the coupling port of the first coupler A are connected with a prevention at radio-frequency port of Canceller circuit B；The second coupler B5 will The intermodulation offseting signal that Canceller circuit B is generated is superimposed upon the chain road after duplexer A0 receiving port, the second coupler B5's One primary path port is directly connected to duplexer A0 receiving port, and apart from need to control within the scope of 0 to 1 meter, the present embodiment Middle distance is 0 meter, and specific length is offset optimum efficiency by passive intermodulation and determined.The primary path port is the first primary path port, Another primary path port and passive intermodulation detection circuit D are connected as the second primary path port, the coupled end of the second coupler B5 Mouth is connected with another prevention at radio-frequency port of Canceller circuit B.
When the duplexer A0 or antenna feeder component A2 or antenna A1 individually generate or multiple passive devices while generating simultaneously Having with reception signal for being formed by stacking only has single 3 rank or single 5 rank or list in the passive intermodulation signal at certain frequency interval A higher order component of degree n n falls into the frequency acceptance band of duplexer A0 and the passive intermodulation tested from duplexer A0 receiving port is caused to refer to When preset value requirement is not achieved in mark, for the second primary path port for making the second coupler B5 after the duplexer A0 receiving port Passive intermodulation value afterwards meets preset value requirement and the counteracting ability of the present apparatus is made to be greater than 20dB:
Intermodulation of the Canceller circuit B using the transmitting signal in radiofrequency signal obtained in Canceller circuit B The inter-modulated signal that identical as the passive intermodulation signal frequency, amplitude is different and phase is different is produced on signal generator B2； And the power of reception signal and passive intermodulation signal in the radiofrequency signal generated on the inter-modulated signal generator B2 it is mutual It adjusts the amplitude of signal to be much smaller than the amplitude of above-mentioned passive intermodulation signal, passive intermodulation offset result is not had an impact；It is described mutual By the amplitude adjustment of the amplitude modulation and phase modulation device B1 in Canceller circuit B and phase adjustment after tune signal reflex, and couple output extremely The primary path of second coupler B5, formed with the passive intermodulation signal in fall into receive frequency range and with receive signal have centainly The component frequencies of frequency interval are identical, amplitude is identical and the intermodulation offseting signal of opposite in phase, the intermodulation offseting signal with it is described The component that reception frequency range is fallen into passive intermodulation signal is offset, and the passive intermodulation signal after counteracting is less than or equal to passive intermodulation Preset value；Simultaneously the transmitting signal in duplexer A0 and its antenna link and signal is received in duplexer A0 and its antenna link Normal operation；In addition, the maximum amplitude for the intermodulation offseting signal that the inter-modulated signal generator B2 can be generated is greater than The width for receiving the single component of frequency range respective frequencies is dropped into the duplexer A0 and its passive intermodulation signal of antenna link Value；
When the duplexer A0 or antenna feeder component A2 or antenna A1 individually generate or multiple passive devices while generating simultaneously Be formed by stacking with receive signal and have in the passive intermodulation signal at certain frequency interval only 3 ranks of multiple and different frequencies or more 5 ranks of a different frequency or the higher order component of degree n n of multiple and different frequencies fall into the frequency acceptance band of duplexer A0 and cause from duplex When preset value requirement is not achieved in the passive intermodulation index of device A0 receiving port test, after making the duplexer A0 receiving port Passive intermodulation value behind the second primary path port of second coupler B5 meets preset value requirement and makes the counteracting ability of the present apparatus Greater than 20dB.
The transmitting signal in the Canceller circuit B radiofrequency signal is input to through RF switch B3, modulation circuit 3 goes in ring Produce that, amplitude identical as the passive intermodulation signal frequency be different after device 4 and inter-modulated signal generator B2 processing and phase not Same inter-modulated signal, and single 3 order component for receiving frequency range or single 5 order component or single higher are fallen into the inter-modulated signal 5 order components or multiple and different frequency points of 3 order components or multiple and different frequency points of order component or multiple and different frequency points are more High-order component of degree n n, or have amplitude relation and phase relation between the even higher order component of 3 order components, 5 order components simultaneously Single 3 order component for receiving frequency range or single is fallen into the passive intermodulation signal generated with the duplexer A0 and its antenna link 5 ranks point of 3 order components or multiple and different frequency points of a 5 order component or single higher order component of degree n n or multiple and different frequency points The higher order component of degree n n of amount or multiple and different frequency points, or have between the even higher order component of 3 order components, 5 order components simultaneously Magnitude relation and phase relation it is almost the same；And the power for receiving signal and passive intermodulation signal in the radiofrequency signal is in institute The amplitude for stating the inter-modulated signal generated on inter-modulated signal generator B2 is much smaller than the amplitude of above-mentioned passive intermodulation signal, not to passive Intermodulation offset result has an impact；Pass through the amplitude of the amplitude modulation and phase modulation device B1 in Canceller circuit B after the inter-modulated signal reflection Adjustment and phase adjustment, and couple the primary path of output to the second coupler B5, formed and fallen into the passive intermodulation signal Receive frequency range and have that the component frequencies at certain frequency interval are identical, amplitude is identical and the intermodulation of opposite in phase is supported with signal is received Disappear signal, and the component that reception frequency range is fallen into the intermodulation offseting signal and the passive intermodulation signal is offset, after counteracting Passive intermodulation signal is less than or equal to passive intermodulation preset value；Duplexer A0 and its transmitting signal and reception in antenna link simultaneously Signal normal operation in duplexer A0 and its antenna link；In addition, the correspondence that the inter-modulated signal generator B2 can be generated The maximum amplitude of the intermodulation offseting signal of passive intermodulation component frequencies is greater than the duplexer A0 and its antenna link The amplitude for receiving multiple respective frequencies components of frequency range is dropped into passive intermodulation signal.
For above-mentioned three kinds of situations, when actual selection constitutes the specific device of inter-modulated signal generator B2, should make described mutual Adjust produce that, amplitude identical as the passive intermodulation signal frequency in the radiofrequency signal be different on signal generator B2 and phase not Same inter-modulated signal, and single 3 order component for receiving frequency range or single 5 order component or single higher are fallen into the inter-modulated signal 5 order components or multiple and different frequency points of 3 order components or multiple and different frequency points of order component or multiple and different frequency points are more High-order component of degree n n, or have amplitude relation and phase relation between the even higher order component of 3 order components, 5 order components simultaneously Single 3 order component for receiving frequency range or single is fallen into the passive intermodulation signal generated with the duplexer A0 and its antenna link 5 ranks point of 3 order components or multiple and different frequency points of a 5 order component or single higher order component of degree n n or multiple and different frequency points The higher order component of degree n n of amount or multiple and different frequency points, or have between the even higher order component of 3 order components, 5 order components simultaneously Magnitude relation and phase relation it is almost the same；And the correspondence passive intermodulation point that the inter-modulated signal generator B2 can be generated The maximum amplitude for measuring the intermodulation offseting signal of frequency is greater than the passive intermodulation letter of the duplexer A0 and its antenna link The amplitude for receiving multiple respective frequencies components of frequency range is dropped into number；
For above-mentioned three kinds of situations, the first coupler A has second of position: the first coupler A is serially connected with this In the transmit circuit unit F of device, one of primary path port is connect with the emission port of duplexer A0；First coupling at this time Device A direct-coupling transmitting signal is output to Canceller circuit B；
In above-mentioned three kinds of situations, the amplitude adjustment of the amplitude modulation and phase modulation device B1 and phase adjustment pass through digital processing element Amplitude, the phase controlling parameter of E operation output are realized；And the calculating of the amplitude, phase controlling parameter of digital processing element E needs Want the sampled signal of passive intermodulation detection circuit D；
RF switch B3 in the Canceller circuit B can make inter-modulated signal generator in the attenuation of modulation circuit 3 When B2 does not generate the inter-modulated signal that can influence duplexer A0 passive inter-modulation performance, it can not have to；The Canceller circuit B In filter 5 can between circulator 4 and amplitude modulation and phase modulation device B1, or be located at amplitude modulation and phase modulation device B1 and the second coupler Between B5；
The passive intermodulation detection circuit D, effect are by the radiofrequency signal after the duplexer A0 receiving port by increasing The regulatable amplification of benefit, down coversion are ultimately converted to digital signal and are input to digital processing element E, the passive intermodulation inspection The prevention at radio-frequency port of slowdown monitoring circuit D is directly connect with the second primary path port of the second coupler B5 after duplexer A0 receiving port, The radiofrequency signal that the circuit obtains falls into the component for receiving frequency range comprising receiving in signal and passive intermodulation signal, and the circuit Receive the difference that dynamic range is greater than between the maximum power value and the corresponding performance number of passive intermodulation preset value for receiving signal；Institute Passive intermodulation detection circuit D is stated to connect by high-speed AD converter with the digital processing element E, high-speed AD converter Duplexer A0 of the sampling rate more than or equal to 2 times receives band bandwidth.
When the radiofrequency signal in passive intermodulation detection circuit D is excessive causes link obstructions, digital processing element E will reduce The link gain of passive intermodulation detection circuit D so as to normally handle receive signal and stop detect passive intermodulation signal amplitude；When When passive intermodulation detection circuit D does not block, the digital processing element E is needed during carrying out the calculating of passive intermodulation amplitude To be processed includes passive intermodulation signal and reception signal and passive intermodulation in the signal of passive intermodulation detection circuit D There is certain frequency interval between signal and reception signal；The method for calculating passive intermodulation signal amplitude are as follows: digital processing element E is first The frequency information of associated passive intermodulation signal is first calculated according to emission signal frequency information, then according to reception signal Frequency, bandwidth information and passive intermodulation signal frequency, bandwidth information acquire the frequency interval between them, and according between the frequency Passive intermodulation signal amplitude is calculated every the suitable algorithm of selection；The algorithm for calculating passive intermodulation signal amplitude includes but unlimited In direct filter integration method and region filtering integration method: the direct filter integration method refers to straight according to passive intermodulation signal bandwidth It connects digital filtering and integrates and seek amplitude, the passive intermodulation signal drops into each order component for receiving frequency range and receives and believes at this time Frequency interval between number is greater than in the digital filtering algorithm equal to passive intermodulation signal digital filter passband to stopband Intermediate zone bandwidth, this frequency interval are the foundation using direct filter integration method；The region filtering integration method refers to nothing It is wide that source inter-modulated signal bandwidth is divided into several subbands, according to the wide progress digital filtering of each subband and integrates and seeks amplitude, then will own The corresponding amplitude of subband width carries out the cumulative entire signal amplitude of acquisition, the frequency between each order component described at this time and reception signal Rate interval is greater than intermediate zone bandwidth of the digital filter passband equal to each order component side subband signal to stopband, this frequency Interval is the foundation using region filtering integration method.
The digital processing element E is first depending on emission signal frequency information, calculates associated passive intermodulation letter Number frequency information, and the filtering parameter of passive intermodulation signal is converted into, then according to receiving signal frequency, bandwidth information Acquire the frequency interval between them with passive intermodulation signal frequency, bandwidth information, the corresponding digital filtering mode of reselection and Integral way, the final amplitude detection realized to passive intermodulation signal；Then by the detected amplitude of the passive intermodulation signal with Passive intermodulation preset value compares: when the detected amplitude is less than or equal to the preset value, the Canceller circuit B is not produced Raw intermodulation offseting signal, does not have an impact the passive intermodulation index of the duplexer A0 and its antenna link；When the detection When amplitude is greater than the preset value, controls the Canceller circuit B and the adjustment of its amplitude and phase is produced and the duplex The passive intermodulation signal frequency of device A0 and its antenna link is identical, amplitude is identical and the intermodulation offseting signal of opposite in phase with it is described Passive intermodulation signal in radiofrequency signal is offset, and when keeping this amplitude detection fructufy according to passive intermodulation signal Regulate and control the work shape that the Canceller circuit B amplitude and phase make passive intermodulation signal cancellation result be less than or equal to the preset value State.
The digital processing element E obtains the emission signal frequency information and receives a kind of method of signal frequency information It is to obtain transmitting signal from the transmit circuit unit F of described device using transmitting signal frequency detecting circuit E1, is converted to digital letter Number, input digital processing element E carries out frequency discrimination processing, obtains associated transmissions signal frequency information, and by transmitting signal and reception Duplex frequency separation between signal calculates correspondingly received signal frequency information；Obtain the emission signal frequency information and reception Another method of signal frequency information is by the information interactive interface in digital processing element E directly from the input of the device It is obtained in information.
First coupler A described in the present embodiment has second of position, and as shown in Figure 2: the first coupler A is serially connected with In the transmit circuit unit F of the device, one of primary path port is connect with the emission port of duplexer A0, another master is logical Road port is connect with the radio frequency delivery outlet of transmit circuit unit F intermediate power amplifier；The first coupler A direct-coupling emits at this time Signal is output to Canceller circuit B；
The present apparatus can be applied to digital radio transceiver and its antenna link to offset passive device and to generate not Qualified passive intermodulation makes the passive intermodulation index of wireless transmitting-receiving equipments and its antenna link meet passive intermodulation preset value；And It is corresponding when connecting antenna after multiple wireless transmitting-receiving equipments use simultaneously and the antenna link of each equipment is combined by combiner The underproof passive intermodulation of the generation of the passive device in the antenna link can also be offset in the present apparatus of every strip antenna link The passive intermodulation index of wireless transmitting-receiving equipments and its antenna link is set to meet passive intermodulation preset value；The digital radio transmitting-receiving is set The standby including but not limited to equipment such as Remote Radio Unit, repeater, radio station, microwave transmitting and receiving equipment, the antenna link packet Contain but be not limited to cable, connector, coupler, combiner, antenna.
The duplexer A0 and its antenna link generate the signal of passive intermodulation signal and the inter-modulated signal are motivated to occur Device B2 generate inter-modulated signal signal be it is homologous, derive from the transmitting signal of transmit circuit unit F, thus passive device produce Raw passive intermodulation signal is identical with the frequency of the inter-modulated signal generator B2 inter-modulated signal generated, bandwidth is identical；The antenna Link be from duplexer A0 antenna opening to this section of link of antenna A1, it is single or multiple in the antenna feeder component A2 representative antennas link The combination of passive device, these passive devices include but is not limited to cable, connector, coupler, combiner；The transmitting signal It is made of multi-tone signal or is made of multicarrier modulated signal；
When the duplexer A0 or antenna feeder component A2 or antenna A1 individually generate or multiple passive devices while generating simultaneously Having with reception signal for being formed by stacking only has single 3 rank or single 5 rank or list in the passive intermodulation signal at certain frequency interval A higher order component of degree n n falls into the frequency acceptance band of duplexer A0 and the passive intermodulation tested from duplexer A0 receiving port is caused to refer to When preset value requirement is not achieved in mark, for the second primary path port for making the second coupler B5 after the duplexer A0 receiving port Passive intermodulation value afterwards meets preset value requirement and the counteracting ability of the present apparatus is made to be greater than 20dB: the inter-modulated signal generator B2 The maximum amplitude for the intermodulation offseting signal that can be generated is greater than the passive intermodulation of the duplexer A0 and its antenna link The amplitude for receiving the single component of frequency range respective frequencies is dropped into signal；
When the duplexer A0 or antenna feeder component A2 or antenna A1 individually generate or multiple passive devices while generating simultaneously Be formed by stacking with receive signal and have in the passive intermodulation signal at certain frequency interval only 3 ranks of multiple and different frequencies or more 5 ranks of a different frequency or the higher order component of degree n n of multiple and different frequencies fall into the frequency acceptance band of duplexer A0 and cause from duplex When preset value requirement is not achieved in the passive intermodulation index of device A0 receiving port test, after making the duplexer A0 receiving port Passive intermodulation value behind the second primary path port of second coupler B5 meets preset value requirement and makes the counteracting ability of the present apparatus Greater than 20dB: the intermodulation offseting signal for the correspondence passive intermodulation component frequencies that the inter-modulated signal generator B2 can be generated is most Amplitude is greater than the multiple correspondences for dropping into the duplexer A0 and its passive intermodulation signal of antenna link and receiving frequency range The amplitude of frequency component；Phase in the inter-modulated signal generated on the inter-modulated signal generator B2 between multiple specific order components Phase in the passive intermodulation signal that position relationship is generated with the duplexer A0 and its antenna link between multiple specific order components Position relationship is almost the same；
When the duplexer A0 or antenna feeder component A2 or antenna A1 individually generate or multiple passive devices while generating simultaneously Having in the passive intermodulation signal at certain frequency interval with reception signal for being formed by stacking has 3 ranks, 5 ranks or higher order component of degree n n simultaneously Fall into the frequency acceptance band of duplexer A0 and all cause from duplexer A0 receiving port test passive intermodulation index be not achieved it is default The passive intermodulation behind the second primary path port when value requires, to make the second coupler B5 after the duplexer A0 receiving port Value meets preset value requirement and the counteracting ability of the present apparatus is made to be greater than 20dB: pair that the inter-modulated signal generator B2 can be generated The maximum amplitude of the intermodulation offseting signal of passive intermodulation component frequencies is answered to be greater than the duplexer A0 and its antenna link Passive intermodulation signal in drop into receive frequency range multiple respective frequencies components amplitude；On the inter-modulated signal generator B2 Amplitude relation and phase relation and the duplexer A0 and its day in the inter-modulated signal of generation between multiple specific order components Magnitude relation and phase relation in the passive intermodulation signal that wired link generates between multiple specific order components is almost the same.
Can be reduced in above-mentioned technical proposal to antenna feeder component A2 described in duplexer A0 in the device or its antenna link, The passive intermodulation index request of antenna A1 can keep the passive of the device by the passive intermodulation cancel function of the device in this way Intermodulation index meets preset value, or even makes the passive intermodulation index of the device more when the present apparatus has counteracting ability more than needed It is good, so as to improve or promoted deteriorate due to passive intermodulation caused by receiver sensitivity.It can eliminate due in the device simultaneously The antenna feeder component A2 or antenna A1 refers to the passive intermodulation that the working time increases and occurs in duplexer A0 or its antenna link The influence deteriorated is marked, or even keeps the passive intermodulation index of the device more preferable when the present apparatus has counteracting ability more than needed, so as to Receiver sensitivity caused by improving or being promoted due to passive intermodulation deterioration；Furthermore it can duplexer A0 or its day in the apparatus Passive intermodulation index when needing more preferable of antenna feeder component A2 in wired link, antenna A1, promote the passive intermodulation index of described device Value, further to promote the receiver sensitivity due to caused by passive intermodulation deficiency.
The a port of the Canceller circuit B is directly connected to by the first coupler A and duplexer A0 antenna opening, or It is directly connected to by the first coupler A and duplexer A0 emission port；Another port of the Canceller circuit B passes through second Coupler B5 and the link connection after duplexer A0 receiving port；The first primary path port of the second coupler B5 and duplex Device A0 receiving port connects and connection distance need to control within the scope of 0 to 1 meter, and it is 0 meter that i.e. distance is directly connected in the present embodiment. Second the second primary path port coupler B5 is connected with the rf inputs of passive intermodulation detection circuit D, the second coupler B5's Coupling port connects Canceller circuit B；The insertion loss of the first coupler A is less than 0.2dB；The first coupler A's Degree of coupling range is 25dB to 45dB, and the present embodiment selects 30dB or so.The coupling port of first coupler A is believed relative to transmitting Number for positive coupling port；The load power of first coupler A need to be greater than the maximum transmission power peak value of the device, the present embodiment In the first coupler A carrying mean power be greater than 100 watts and carrying peak power be greater than 1000 watts.First coupler The bandwidth of A need to be comprising emitting frequency range, and gain fluctuation is related to transmitting frequency range in the frequency band of the first coupler A and need to be in certain door In limits；The passive intermodulation index of first coupler A is -117dBm/Hz；The insertion loss of the second coupler B5 is small In 0.2dB；The degree of coupling range of the second coupler B5 is 20dB to 40dB, the second coupler B5 described in the present embodiment The degree of coupling is 25dB or so.The coupling port of second coupler B5 is reverse coupled port relative to signal is received；Second coupling The bandwidth of device B5 need to be comprising receiving frequency range, and gain fluctuation is related to frequency range is received in the frequency band of the second coupler B5 and need to be certain Threshold value within the scope of；The load power threshold value of the Canceller circuit B need to be more than or equal to the power threshold of the first coupler A The average power threshold value of the difference of value and the degree of coupling of the first coupler A, i.e., the described Canceller circuit B carrying is more than or equal to 20dBm and carrying peak power threshold value be more than or equal to 30dBm.To enable inter-modulated signal generator B2 in Canceller circuit B Passive intermodulation offseting signal is generated, the minimum value loaded in the transmitting signal power of the Canceller circuit B need to be greater than 10 watts；
The of the second coupler B5 after the prevention at radio-frequency port of the passive intermodulation detection circuit D and duplexer A0 receiving port The connection of two primary path ports falls into the component of reception frequency range to obtain reception signal and passive intermodulation signal, described passive mutual The reception dynamic range of detection circuit D is adjusted to be greater than power corresponding to the maximum power value and passive intermodulation preset value for receiving signal Difference between value.The reception dynamic range of the passive intermodulation detection circuit D is greater than 70dB；Passive intermodulation detection circuit D is logical It crosses high-speed AD converter to connect with the digital processing element E, the sampling rate of high-speed AD converter is more than or equal to 2 times Duplexer A0 receives band bandwidth；
The digital processing element E is connect by multi-channel digital and analogue converter with Canceller circuit B, by the control of amplitude, phase Amount processed passes to Canceller circuit B, and the amplitude Adjustment precision of the Canceller circuit B and the requirement of phase adjustment precision mainly come Derived from passive intermodulation signal cancellation ability need.The digit range of digital analog converter in the digital processing element E 10~ Between 18, and at least 3 digital analog converters.The amplitude Adjustment precision of the B of Canceller circuit described in the present embodiment is less than 0.1dB and phase adjustment precision are less than 1 degree.
At least there are two interfaces: an interface effect between the digital processing element E and passive intermodulation detection circuit D It is the sampled signal for obtaining passive intermodulation detection circuit D high speed analog-digital converter, to carry out the number of passive intermodulation signal Filtering and amplitude calculate；The effect of another interface is by the parameter of bus configuration passive intermodulation detection circuit D, such as local oscillator Frequency, amplifier gain etc., the bus include but is not limited to I2C bus, spi bus；
When the method that the digital processing element E obtains the emission signal frequency information and receives signal frequency information is When using transmitting signal frequency detecting circuit E1, then emit in prevention at radio-frequency port and the transmit circuit unit F of signal frequency detecting circuit E1 The somewhere of transmitting chain road connects, and transmitting signal frequency detecting circuit E1 passes through high-speed AD converter and the digital processing element E Connection；There are one interfaces between digital processing element E and transmitting signal frequency detecting circuit E1 simultaneously, and effect is to pass through bus configuration Emit signal frequency detecting circuit E1 parameter, such as local frequency, link gain etc., the bus include but is not limited to I2C bus, Spi bus.
In order to meet to above-mentioned Canceller circuit B, passive intermodulation detection circuit D, or transmitting signal frequency detecting circuit E1, very To the configuration needs such as transmit circuit unit F and monitoring demand, the digital processing element E, which is included at least, has Digital Signal Processing The logical process and calculation process device of function, for the reception of digital signal, algorithm process, the output of digital signal, control With the output etc. of configuration signal, the logical process and calculation process device are including but not limited to field programmable gate array device Part, central processing unit, digital signal processor.
The digital processing element E has at least one information interactive interface, and effect is downloaded including but not limited to program, Configuration information input, remote alarm and maintenance；The configuration information for wherein needing to input includes present apparatus transmitted signal bandwidth and frequency Section, the order and band information, passive intermodulation letter for receiving signal bandwidth and frequency range, dominant interference component in passive intermodulation signal Number preset value and the curve changed over time maximum offset number；The digital processing element E can be connect by information exchange Mouth obtains emission signal frequency information and receives signal frequency information；The information interactive interface can also be with internet backstage Resource carries out data interaction: uploading the passive intermodulation value in the equipment running process, the warp that passive intermodulation value changes over time Test the status information of each modular circuit in curve and passive intermodulation signal adaptive canceller；Or downloading complex optimum Rear passive intermodulation signal preset value and the curve changed over time.
3 one end of modulation circuit in the Canceller circuit B is directly connected to the coupling port of the first coupler A, Huo Zhetong Cross the coupling port of RF switch B3 the first coupler of connection A；The other end connects inter-modulated signal generator B2 by circulator 4； From inter-modulated signal generator B2 to the second coupler B5 in the Canceller circuit B.There are two types of structures for the link of coupling port: the One is inter-modulated signal generator B2 to connect filter 5 by circulator 4, and then the one end amplitude modulation and phase modulation device B1 connects filter 5, The other end connects the coupling port of the second coupler B5；Second is that inter-modulated signal generator B2 passes through the connection amplitude modulation of circulator 4 Phase converter B1, then one end of filter 5 connects amplitude modulation and phase modulation device B1, and the other end connects the coupling port of the second coupler B5； The amplitude modulation and phase modulation device B1 is made of modulation circuit 1 and phase modulation circuit 2；Modulation circuit 1 includes at least 1 controllable attenuator； Phase modulation circuit 2 includes at least 2 controllable phase shifters；Modulation circuit 3 is made of fixed attenuator or controllable attenuator；It is described The frequency bandwidth of circulator 4 includes the transmitting frequency range and reception frequency range of the duplexer A0；The amplitude of the amplitude modulation and phase modulation device B1 Adjusting range is greater than 30dB, and phase adjustment range is greater than 180 degree；The working frequency range of the amplitude modulation and phase modulation device B1 includes the duplex The reception frequency range of device A0, gain fluctuation is related to frequency range is received in the frequency band of amplitude modulation and phase modulation device B1 and need to be in certain threshold value model In enclosing；The passband frequency range of the filter 5 is the reception frequency range of duplexer A0, and the Out-of-band rejection index request of filter 5 is Out-of-band rejection index, the first coupler A degree of coupling, the second coupler B5 degree of coupling, Canceller of frequency range are received by duplexer A0 The first coupler A coupled end is determined to link load etc. between the second coupler B5 coupled end in circuit B；The Canceller circuit The load power of modulation circuit 3 is more than or equal to the load power threshold value of Canceller circuit B described in claim 5 in B.This reality Apply the peak value that the average power threshold value that modulation circuit 3 carries in the B of Canceller circuit described in example is more than or equal to 20dBm and carrying Power threshold is more than or equal to 30dBm；
Further, be input to the transmitting signal of the Canceller circuit B through RF switch B3 be input to modulation circuit 3 or Person, which is directly inputted to after modulation circuit 3, then the power adjustment of amplitude modulated circuit 3, is input to inter-modulated signal by circulator 4 Device B2, producing inter-modulated signal generator B2, identical as the passive intermodulation signal frequency, amplitude is different and phase is different Inter-modulated signal, and single 3 order component for receiving frequency range or single 5 order component or single higher order time are fallen into the inter-modulated signal 5 order components of 3 order components or multiple and different frequency points of component or multiple and different frequency points or the higher order of multiple and different frequency points Component of degree n n, or have amplitude relation between the even higher order component of 3 order components, 5 order components and phase relation and institute simultaneously It states in duplexer A0 and its passive intermodulation signal of antenna link generation and falls into single 3 order component for receiving frequency range or single 5 rank 5 order components of 3 order components or multiple and different frequency points of component or single higher order component of degree n n or multiple and different frequency points or The higher order component of degree n n of multiple and different frequency points, or have the width between the even higher order component of 3 order components, 5 order components simultaneously Value relationship and phase relation are almost the same；Again by circulator 4 after inter-modulated signal reflection, through filter 5, and it is amplitude modulated The amplitude adjustment of phase converter B1 and phase adjustment, the primary path of coupling output to the second coupler B5 are formed and described passive mutual It adjusts and falls into receiving frequency range in signal and have that the component frequencies at certain frequency interval are identical, amplitude is identical and phase with signal is received The component that reception frequency range is fallen into opposite intermodulation offseting signal, the intermodulation offseting signal and the passive intermodulation signal is supported Disappear, the passive intermodulation signal after counteracting is less than or equal to passive intermodulation preset value；While the hair in duplexer A0 and its antenna link It penetrates signal and receives signal normal operation in duplexer A0 and its antenna link；RF switch in the Canceller circuit B B3 can be such that inter-modulated signal generator B2 does not generate in the attenuation of modulation circuit 3 can influence duplexer A0 passive inter-modulation performance The inter-modulated signal when, can not have to；Filter 5 in the Canceller circuit B can be located at circulator 4 and amplitude modulation and phase modulation Between device B1, or between amplitude modulation and phase modulation device B1 and the second coupler B5.
Inter-modulated signal generator B2 in the Canceller circuit B is including but not limited to single diode, single triode Or the in parallel of multiple diodes is constituted；Diode concrete model or triode concrete model and generation 3 rank of inter-modulated signal, 5 ranks Or the amplitude characteristic of higher order inter-modulated signal is related to phase characteristic, the demand of the amplitude characteristic and phase characteristic is to intermodulation The requirement of signal generator B2；When using multiple same model diodes in parallel structures, inter-modulated signal intensity will be enhanced；Inter-modulated signal The load power of generator B2 be more than or equal to the Canceller circuit B load power threshold value with it is defeated from Canceller circuit B radio frequency Entrance to inter-modulated signal generator B2 link load difference.The load power of inter-modulated signal generator B2 is big in the present embodiment In equal to 20dBm.
The passive intermodulation detection circuit D includes at least low-noise amplifier, down conversion module, high-speed AD converter； The noise coefficient of the low-noise amplifier is less than 1dB；Received radiofrequency signal can be converted into intermediate frequency letter by down conversion module Number；The sampling dynamic range of high-speed AD converter need to be greater than the maximum power value for receiving signal and passive intermodulation preset value is corresponding Performance number between difference.The sampling dynamic range of the present embodiment high speed analog-digital converter need to be greater than 70dB, analog-to-digital conversion The digit of device is 14, and duplexer A0 of the sampling rate more than or equal to 2 times receives band bandwidth.The passive intermodulation detection circuit The minimum power that D can be sampled is less than or equal to the corresponding passive intermodulation performance number of preset value, passive intermodulation described in the present embodiment The minimum power that detection circuit D can be sampled is less than or equal to -115dBm.The circuit can be according to the received radiofrequency signal of institute simultaneously The range-adjusting link gain of general power is to avoid link obstructions caused by receiving signal or other signals；The passive intermodulation The gain of detection circuit D is by the passive intermodulation preset value of demand, the minimum of passive intermodulation detection circuit D high speed analog-digital converter Sampled power, chain noise factor etc. determine；The maximum value of the received signal power of the passive intermodulation detection circuit D be greater than etc. In the maximum receiving signal power of the practical corresponding communication standard defined of the device.The detection of passive intermodulation described in the present embodiment The maximum value of the received signal power of circuit D is more than or equal to -50dBm.
The passive intermodulation detection circuit D's can be turned radiofrequency signal using reception super-heterodyne architecture as shown in Figure 3 It is changed to intermediate-freuqncy signal and carries out analog-to-digital conversion again, passive intermodulation detection circuit D is by low-noise amplifier D1, rf filtering and small at this time Signal amplification unit D2, frequency mixer D3, local oscillator D4, intermediate-frequency filter D5, intermediate frequency amplifier D6, analog-digital converter D7 are constituted, The passband frequency range of middle rf filtering and the filtering unit in low level signal amplification cells D 2 is the reception frequency range of duplexer A0；The nothing Radiofrequency signal can be converted to zero intermediate frequency letter using reception zero-if architecture as shown in Figure 4 by source intermodulation detection circuit D Number analog-to-digital conversion is carried out again, passive intermodulation detection circuit D is by low-noise amplifier D1, rf filtering and low level signal amplification list at this time First D2, down coversion and AD conversion unit D8 are constituted, wherein rf filtering and the filtering unit in low level signal amplification cells D 2 Passband frequency range is the reception frequency range of duplexer A0, and down coversion and AD conversion unit D8 effect are to be converted directly into radiofrequency signal Zero intermediate frequency signals simultaneously carry out analog-to-digital conversion.
In the present embodiment, the digital processing element E include at least have the logical process of digital signal processing function with Calculation process device, for the reception of digital signal, algorithm process, the output of digital signal, control and the output for configuring signal Deng, the logical process and calculation process device including but not limited to Field Programmable Gate Array Devices, central processing unit, number Signal processor；The hardware of the information interactive interface of the digital processing element E constitute include but is not limited to Ethernet interface, RS-485 bus interface；The digit of digital analog converter in the digital processing element E is the number in the digital processing element E For the digit range of mode converter between 10~18, the present embodiment is and at least 3 digital analog converters between 12；Institute State the journey that corresponding " a kind of method of passive intermodulation signal in adaptive cancellation wireless transceiver system " is run in digital processing element E Sequence, the flow chart of this method is referring to Fig. 5.
A kind of method of passive intermodulation signal in adaptive cancellation wireless transceiver system, it is characterised in that: this method includes Following steps,
S1: transmitted signal bandwidth and frequency range are obtained by digital processing element E, receive signal bandwidth and frequency range, it is passive mutually Adjust the order and band information, desired passive intermodulation preset value and the song changed over time of the dominant interference component in signal The information such as line, the initial experience data of amplitude and phase, maximum counteracting number, and it is converted into corresponding configuration parameter；
S2: according to the configuration parameter in step S1 in relation to emitting signal, digital processing element E acquires passive intermodulation signal Frequency point is simultaneously converted into respective digital filtering parameter and is stored into parameter allocation list；
S3: according to the configuration parameter of reception signal related in step S1, the configuration parameter of passive intermodulation signal and by step The digital filter parameters of the passive intermodulation signal obtained in rapid S2, sampling of the digital processing element E to passive intermodulation detection circuit D Signal carries out digital filtering, filters out other signal components in addition to passive intermodulation signal, acquires the nothing for dropping into and receiving frequency range The range value of source inter-modulated signal；The algorithm for seeking range value include but is not limited to sectional integration method, basis signal bandwidth it is straight Connect integration method；
S4: judge current working status；The status indicator default value of the working condition is: " initial operation mode "；Such as The status indicator value of fruit working condition is that " initial operation mode " then continues step S5-1, otherwise continues step S5-2；
S5-1: the passive intermodulation preset value in passive intermodulation signal amplitude value that step S3 is obtained and step S1 is carried out pair Than to judge passive intermodulation preset value that whether passive intermodulation signal amplitude is less than or equal to；
S6: if the judging result of step S5-1 be "Yes", Canceller circuit B continue keep inter-modulated signal generator with Link high-isolation state between first coupler A；And return step S2；
S7: if the judging result of step S5-1 is "No", Canceller circuit B is switched to inter-modulated signal generator and the The low isolation state of link between one coupler A；And by the status indicator value of working condition and it is set as " offsetting working condition "； Continue to execute step S8；
S5-2: the passive intermodulation preset value in passive intermodulation signal amplitude value that step S3 is obtained and step S1 is carried out pair Than to judge passive intermodulation preset value that whether passive intermodulation signal amplitude is less than or equal to；If the judging result of step S5-2 is "Yes", then hold mode, and return step S2；If the judging result of step S5-2 is "No", S8 is thened follow the steps；
S8: the range value of the passive intermodulation signal according to step S3 calculates the amplitude of Canceller circuit, phase adjustment value；And Modulator, the phase converter being distributed in Canceller circuit are implemented to offset；It completes to continue back after previous round counteracting processing Continue the counteracting processing of next round to step S2；It is described to ask amplitude, the algorithm including but not limited to two dimension of phase adjustment value minimum Variance algorithm.
In the present embodiment, as shown in table 1: the tone signal in the transmit circuit unit F there are two 43dBm constitutes one The two-tone signal of a 46dBm, the two-tone signal make duplexer A0 and its antenna link produce passive intermodulation signal, and practical In the passive intermodulation that duplexer A0 receiving port is tested 3 order component amplitudes be -95.5dBm, and 5 order components be - 125.4dBm, 7 order components are under frequency spectrograph thermal noise；The duplexer A0 and its passive intermodulation signal of antenna link decline The component for entering to receive frequency range is less than or equal to the preset value of -112dBm, so mainly 3 rank passive intermodulations of optimization are bad, while 3 ranks are believed Number and 5 rank signal amplitudes differ 29.9dB；Inter-modulated signal caused by the particular diode selected at this time is received in duplexer A0 The test value of port is: 3 order component amplitudes are -75.1dBm, and 5 order components are -105.6dBm, and 7 order components are made an uproar in frequency spectrograph heat Under sound, 3 rank signals and 5 rank signal amplitudes differ 30.5dB at this time；After passive intermodulation cancel function is opened, at this time in duplex 3 order component amplitudes in the passive intermodulation that device A0 receiving port is tested are as shown in fig. 6, be -117.4dBm, and 5 order components such as Fig. 7 It is shown, it is -131.4dBm, 7 order components are under frequency spectrograph thermal noise；It can be seen that causing undesirable 3 rank of device passive intermodulation Component optimizes 21.9dB, and 5 order components also synchronize it is optimised.At this point, the passive intermodulation signal, which drops into, receives frequency range Each order component and the frequency interval received between signal are more than or equal to 200KHz；
The example that the present embodiment device is applied to wireless transmitting-receiving equipments is as shown in Figure 8: the present apparatus is double at this time Work device A0 is the duplexer A0 of wireless transmitting-receiving equipments；The passive intermodulation detection circuit D multiplexing wireless transmitting-receiving equipments of the present apparatus The component or unit of receives link, or increase passive intermodulation detection circuit D newly in the wireless transmitting-receiving equipments, and according to wireless The reception frequency range of transceiver adjusts accordingly.The transmitting chain of the transmit circuit unit F multiplexing wireless transmitting-receiving equipments of the present apparatus The component or unit on road, and the transmitting frequency range according to wireless transmitting-receiving equipments adjusts accordingly；The digital processing element E of the present apparatus It is multiplexed the component or unit of the digital processing element of wireless transmitting-receiving equipments；Or it is increased newly at number in the wireless transmitting-receiving equipments Unit E is managed, " the side of passive intermodulation signal in a kind of adaptive cancellation wireless transceiver system corresponding in the digital processing element E The program of method " will be integrated in the complete machine program of wireless transmitting-receiving equipments.Mono- primary path port the first coupler A of the present apparatus and The duplexer A0 antenna opening of wireless transmitting-receiving equipments connects or the duplexer A0 of one primary path port and wireless transmitting-receiving equipments Emission port connection.The coupling port of first coupler A is positive coupled end relative to wireless transmitting-receiving equipments transmitting signal Mouthful.Second coupler B5 of the present apparatus need to be increased newly in the wireless transmitting-receiving equipments.Mono- master of the second coupler B5 of the present apparatus The duplexer A0 receiving port of access port and wireless transmitting-receiving equipments is directly connected to, the coupling port of the second coupler B5 relative to It is reverse coupled port that the wireless transmitting-receiving equipments, which receive signal,；A rf inputs mouth of the Canceller circuit B of the present apparatus It is directly connected to the coupling port of the first coupler A, the coupling port of another radio frequency output port and the second coupler B5 are straight It connects in succession, amplitude, the phase controlling that the amplitude adjustment of Canceller circuit B is exported with phase adjustment by digital processing element E operation Parameter is realized.
The wireless transmitting-receiving equipments be a transmitting frequency range be 1805MHz~1880MHz, receive frequency range be 1710MHz~ The radio frequency remote equipment of 1785MHz, FDDLTE standard, setting transmitting signal 1 is 1820MHz/43dBm, transmitting signal 2 is 1860MHz/43dBm, the two-tone signal make duplexer A0 and its antenna link produce passive intermodulation signal, as shown in Figure 9: 3 order component amplitudes are -107.6dBm/1780MHz, and 5 order components and 7 in the passive intermodulation that duplexer A0 receiving port is tested Order component is under frequency spectrograph thermal noise；Reception frequency range is fallen into the duplexer A0 and its passive intermodulation signal of antenna link Component be less than or equal to -110dBm preset value, so mainly optimization 3 rank passive intermodulation components；When passive intermodulation cancel function After unlatching, at this time in the passive intermodulation that duplexer A0 receiving port is tested 3 order components as shown in figure 9, amplitude be- 128.1dBm；Undesirable 3 order component of equipment passive intermodulation optimizes 20.5dB；Again work in radio frequency remote equipment and the present apparatus Under FDD LTE dual carrier, at this time emit signal 1 be 1820MHz/44dBmPeak/ signal peak-to-average ratio be 7dB/IBW=20MHz, It is 7dB/IBW=20MHz that transmitting signal 2, which is 1860MHz/44dBmPeak/ signal peak-to-average ratio, loads dual carrier letter in equipment After number, emit 1 corresponding ACPR Adjacent Channel Power such as Figure 10 institute of signal when not opening the passive intermodulation cancel function of the present apparatus It is shown as 49.7dBc/60.4dBc, the transmitting corresponding ACPR Adjacent Channel Power Ratio of signal 2 is 47.9dBc/ as shown in figure 11 60.4dBc, the intensity that the RSSI for detecting receives link at this time reports value to receive signal are designated as -60.59dBfs；Open the present apparatus Passive intermodulation cancel function after, transmitting the corresponding ACPR Adjacent Channel Power Ratio of signal 1 be as shown in figure 12 50.2dBc/ 60.5dBc, the transmitting corresponding ACPR Adjacent Channel Power Ratio of signal 2 is 48.5dBc/60.3dBc as shown in figure 13, and detection connects at this time The intensity that the RSSI for receiving link reports value to receive signal is designated as -60.69dBfs；In addition, the reception signal of corresponding transmitting signal 1 1 frequency point is 1725Mhz, IBW 20MHz, and the frequency point of the reception signal 2 of corresponding transmitting signal 2 is 1765Mhz, and IBW is 20MHz will receive signal and be looped back to transmitting chain road and test EVM, reception when not opening the passive intermodulation cancel function of the present apparatus The EVM of signal 1 is 3.1% or so as shown in figure 14, and the EVM for receiving signal 2 is 3.06% or so as shown in figure 15；Open this dress After the passive intermodulation cancel function set, the EVM for receiving signal 1 is 3.1% or so as shown in figure 16, receives the EVM of signal 2 as schemed 17 show 3.06% or so；Before being opened for present apparatus passive intermodulation cancel function and after opening, by identical frequency point signal The comparison of ACPR value and the comparison of receives link index of correlation be not it is found that the passive intermodulation cancel function of described device has pair substantially Emit linearly performance and receptivity generates adverse effect.
In addition, the present embodiment described device applies an example in wireless discharging-directly station as shown in figure 18: described wireless straight Putting station includes the first coupler A-1, the first coupler A-2, the second coupler B5-1, the second coupler B5-2, Canceller circuit B-1, Canceller circuit B-2, receiving circuit unit D-1, receiving circuit unit D-2, digital processing element E, duplexer A0-1 are double Work device A0-2, transmit circuit unit F -1, transmit circuit unit F -2；Refer to using duplexer A0-1 and duplexer A0-2 as passive intermodulation Mark optimization object simultaneously constitutes the device that two tacklings have passive intermodulation cancel function around this duplexer, described to have passive intermodulation The device of cancel function can will drop into reception in the passive intermodulation signal generated in corresponding duplexer and its antenna link The component of frequency range is offset；Using duplexer A0-1 as passive intermodulation index optimization object constituted with passive intermodulation cancel function Device is referred to as first device, using duplexer A0-2 as what passive intermodulation index optimization object was constituted there is passive intermodulation to offset function The device of energy is referred to as second device；For the explanation of first device are as follows: the duplexer A0 of the present apparatus is the double of wireless discharging-directly station Work device A0-1；The component or unit of the receives link of the passive intermodulation detection circuit D multiplexing wireless discharging-directly station of the present apparatus, constitute nothing Source intermodulation detection circuit D-1；The transmit circuit unit F -1 of the transmit circuit unit F multiplexing wireless discharging-directly station of the present apparatus；The present apparatus Digital processing element E multiplexing wireless discharging-directly station digital processing element E, the digital processing element E in it is corresponding " a kind of adaptive The program of the method that passive intermodulation signal in wireless transceiver system should be offset " will be integrated in the complete machine program of wireless discharging-directly station； First coupler A of the present apparatus need to be increased newly in the wireless discharging-directly station and is known as the first coupler A-1 in first device, and The duplexer A0-1 antenna opening of one primary path port and wireless discharging-directly station is directly connected to, the coupling of the first coupler A-1 It heals up and is connect with a rf inputs mouth of Canceller circuit B-1, the coupling port of the first coupler A-1 is relative to described double The transmitting signal of work device A0-1 is positive coupling port；Second coupler B5 of the present apparatus need to be increased newly in the wireless discharging-directly station And it is known as the second coupler B5-1 in first device, one primary path port directly connects with duplexer A0-1 receiving port It connects, another primary path port is connect with the rf input port of passive intermodulation detection circuit D-1, the coupling of the second coupler B5-1 It heals up and is connect with another radio frequency output port of Canceller circuit B-1, the coupling port of the second coupler B5-1 is relative to institute The reception signal for stating duplexer A0-1 is reverse coupled port；The Canceller circuit B of the present apparatus need to be in the wireless discharging-directly station Increase and constitute Canceller circuit B-1 newly, the amplitude adjustment of Canceller circuit B-1 and phase adjustment are by digital processing element E operation Amplitude, the phase controlling parameter of output are realized；The antenna feeder component A2 and antenna A1 of the present apparatus are the day of the wireless discharging-directly station Correspondence component A2-1 and antenna A1-1 in wired link；For the explanation of second device are as follows: the duplexer A0 of the present apparatus is wireless The duplexer A0-2 of repeater；The present apparatus passive intermodulation detection circuit D multiplexing wireless discharging-directly station receives link component or Unit constitutes passive intermodulation detection circuit D-2；The transmit circuit list of the transmit circuit unit F multiplexing wireless discharging-directly station of the present apparatus First F-2；In the digital processing element E, the digital processing element E of the digital processing element E multiplexing wireless discharging-directly station of the present apparatus The program of corresponding " a kind of method of passive intermodulation signal in adaptive cancellation wireless transceiver system " will be integrated in wireless discharging-directly station Complete machine program in；First coupler A of the present apparatus need to be increased newly in the wireless discharging-directly station and is known as the in second device One coupler A-2, and the duplexer A0-2 antenna opening of one primary path port and wireless discharging-directly station is directly connected to, described first The coupling aperture of coupler A-2 is connect with a rf inputs mouth of Canceller circuit B-2, the coupled end of the first coupler A-2 Mouth is positive coupling port relative to the transmitting signal of the duplexer A0-2；Second coupler B5 of the present apparatus need to be in the nothing It is increased newly in line repeater and is known as the second coupler B5-2 in second device, one primary path port connects with duplexer A0-2 Receiving end mouth is directly connected to, and another primary path port is connect with the rf input port of passive intermodulation detection circuit D-2, second coupling The coupling aperture of clutch B5-2 is connect with another radio frequency output port of Canceller circuit B-2, the coupling of the second coupler B5-2 Port is reverse coupled port relative to the reception signal of the duplexer A0-2；The Canceller circuit B of the present apparatus need to be described Increase and constitute Canceller circuit B-2 in wireless discharging-directly station newly, the amplitude adjustment of Canceller circuit B-2 and phase adjustment are by number Manage the amplitude of unit E operation output, phase controlling parameter is realized；The antenna feeder component A2 and antenna A1 of the present apparatus are described wireless Correspondence component A2-2 and antenna A1-2 in the antenna link of repeater；First device and second in the wireless discharging-directly station at this time The connection type of device is identical as the present apparatus described in the present invention, passes through digital processing list between first device and second device First E, which combines, to be integrated.
In addition, the present embodiment described device applies an example in microwave transmitting and receiving equipment as shown in figure 19: the microwave Transceiver includes the first coupler A, the second coupler B5, Canceller circuit B, receiving circuit unit D, digital processing element E, Duplexer A0, transmit circuit unit F；Tool is constituted using duplexer A0 as passive intermodulation index optimization object and around this duplexer There is the device of passive intermodulation cancel function, the device with passive intermodulation cancel function can be by duplexer A0 and its antenna The component counteracting for receiving frequency range is dropped into the passive intermodulation signal generated in link；The duplexer A0 of the present apparatus is microwave transmitting and receiving The duplexer A0 of equipment；The component or list of the receives link of the passive intermodulation detection circuit D multiplexing microwave transmitting and receiving equipment of the present apparatus Member constitutes passive intermodulation detection circuit D；The transmit circuit unit of the transmit circuit unit F multiplexing microwave transmitting and receiving equipment of the present apparatus F；It is right in the digital processing element E, the digital processing element E of the digital processing element E multiplexing microwave transmitting and receiving equipment of the present apparatus Microwave transmitting and receiving equipment will be integrated in by answering the program of " a kind of method of passive intermodulation signal in adaptive cancellation wireless transceiver system " Complete machine program in, emission signal frequency information by the digital processing element E to from information interactive interface information parse It obtains；First coupler A of the present apparatus need to increase in the microwave transmitting and receiving equipment and be known as in a device the first coupler A newly, And the duplexer A0 antenna opening of one primary path port and microwave transmitting and receiving equipment is directly connected to, the coupling of the first coupler A It heals up and is connect with a rf inputs mouth of Canceller circuit B, the coupling port of the first coupler A is relative to the duplexer The transmitting signal of A0 is positive coupling port；Second coupler B5 of the present apparatus need to be increased newly in the microwave transmitting and receiving equipment and It is known as the second coupler B5 in device, one primary path port is directly connected to duplexer A0 receiving port, another primary path Port is connect with the rf input port of passive intermodulation detection circuit D, the coupling aperture and Canceller circuit B of the second coupler B5 The connection of another radio frequency output port, the coupling port of the second coupler B5 is relative to the reception signal of the duplexer A0 Reverse coupled port；The Canceller circuit B of the present apparatus need to increase in the microwave transmitting and receiving equipment and constitute Canceller circuit B newly, Amplitude, the phase controlling parameter that the amplitude adjustment of Canceller circuit B is exported with phase adjustment by digital processing element E operation are real It is existing；The antenna feeder component A2 and antenna A1 of the present apparatus are correspondence component A2 and day in the antenna link of the microwave transmitting and receiving equipment Line A1；
In addition, the present embodiment described device is applied in wireless transmitting-receiving equipments and wireless transmitting-receiving equipments have multiple receiving-transmitting chains When: be both needed to after each antenna opening of duplexer in each receiving-transmitting chain with a set of first coupler A, the second coupler B5 with And Canceller circuit B；
In addition, the present embodiment described device is applied in wireless transmitting-receiving equipments, in more radio frequency links showing using one of example Be intended to as shown in Figure of description 20: entire link includes multiple wireless transmitting-receiving equipments, more radio frequency system combiner H, antenna A1 And antenna feeder component A2 etc.；And each branch have a passive intermodulation canceller and the single transmitting-receiving chain of wireless transmitting-receiving equipments Road connects, the passive intermodulation of generations and more radio frequency systems such as duplexer A0, antenna A1, antenna feeder component A2 on each branch link The component that the passive intermodulation that combiner H is generated drops into reception frequency range can be cancelled in a certain range；
In addition, the present embodiment described device is applied in wireless transmitting-receiving equipments, and the wireless transmitting-receiving equipments have multiple receipts When sending out link, using the schematic diagram of one of example as shown in Figure of description 21: entire link includes wireless transmitting-receiving equipments, and more Antenna A1-1, A1-2 ... ... and multiple antenna feeder component A2-1, A2-2 ... ...；The each receiving-transmitting chain of wireless transmitting-receiving equipments is equal There is a passive intermodulation canceller connection, the passive intermodulation of the generations such as duplexer, antenna feeder component, antenna on each branch link The component for dropping into reception frequency range can be cancelled in a certain range；
After being installed on wireless transceiver system using the device that present invention design is completed, falls into and connect in link passive intermodulation signal When the component for receiving frequency range is that -90dBm/Hz arrives -95dBm/Hz, described device can be such that passive intermodulation signal cancellation result is greater than 20dB, when falling into the component for receiving frequency range in link passive intermodulation signal better than -95dBm/Hz, described device can make passive mutual Adjust signal cancellation result at least better than -115dBm/Hz.
It should be understood that the above is only a specific embodiment of the invention, but protection scope of the present invention is not limited to In this, anyone skilled in the art 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. a kind of device of adaptive cancellation passive intermodulation signal, it is characterised in that: it includes the first coupler (A), Canceller Circuit (B), the second coupler (B5), passive intermodulation detection circuit (D), digital processing element (E), duplexer (A0), transmitting electricity Road unit (F), antenna feeder component (A2), antenna (A1)；
The signal greater than a certain radio-frequency power value of the transmit circuit unit (F) makes the duplexer (A0) and its antenna link Generate passive intermodulation signal, and fallen in the passive intermodulation signal duplexer (A0) receive frequency range and with receive signal There is the component at certain frequency interval；
The chain road coupled RF signal of antenna opening of first coupler (A) from duplexer (A0), which exports, gives Canceller circuit (B)；Include transmitting signal, passive intermodulation signal and reception signal in the radiofrequency signal；One of first coupler (A) Primary path port connect with the antenna opening of the duplexer (A0), the antenna feeder component in another primary path port and antenna link (A2) connection, the coupling port of the first coupler (A) are connected with a prevention at radio-frequency port of Canceller circuit (B)；Second coupling The intermodulation offseting signal that Canceller circuit (B) generates is superimposed upon the chain road after duplexer (A0) receiving port by clutch (B5), One primary path port of the second coupler (B5) is connect with duplexer (A0) receiving port, which is first main logical Road port, another primary path port and passive intermodulation detection circuit (D) are connected as the second primary path port, the second coupler (B5) coupling port is connected with another prevention at radio-frequency port of Canceller circuit (B)；
It is coupled to the power for receiving signal and passive intermodulation signal in the radiofrequency signal of Canceller circuit (B) in Canceller circuit (B) inter-modulated signal generated on, amplitude adjusted and phase adjustment, primary path of the coupling output to the second coupler (B5), shape At and the passive intermodulation signal in fall into receive frequency range and with receive signal have the component frequencies at certain frequency interval it is identical, The identical intermodulation offseting signal with opposite in phase of amplitude,
The prevention at radio-frequency port of the passive intermodulation detection circuit (D) and the second coupler (B5) after duplexer (A0) receiving port The connection of second primary path port falls into the component of reception frequency range, the passive intermodulation to obtain reception signal and passive intermodulation signal The reception dynamic range of detection circuit (D) is greater than power corresponding to the maximum power value and passive intermodulation preset value for receiving signal Difference between value；Passive intermodulation detection circuit (D) is connect by high-speed AD converter with the digital processing element (E)；
Sampled data meter of the digital processing element (E) according to emission signal frequency information and passive intermodulation detection circuit (D) It calculates the detected amplitude for obtaining passive intermodulation signal and is compared with passive intermodulation preset value；Described in being greater than when the detected amplitude When preset value, controls and fall into reception frequency in Canceller circuit (B) the generation intermodulation offseting signal and the passive intermodulation signal The component of section is offset, and this detected amplitude according to passive intermodulation signal is kept to make to fall into reception in passive intermodulation signal The offset result of the component of frequency range is less than or equal to the working condition of the preset value；The digital processing element (E) passes through multichannel Digital analog converter is connect with Canceller circuit (B), and amplitude, the control amount of phase are passed to Canceller circuit (B), the counteracting The amplitude Adjustment precision of device circuit (B) and the requirement of phase adjustment precision are mainly derived from passive intermodulation signal cancellation ability and need It asks.
2. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: in described device Duplexer (A0) represents the passive device in wireless transmitting-receiving equipments；The antenna feeder component (A2) and antenna (A1) represent wireless receiving and dispatching Passive device in the antenna link of system, the group of single or multiple passive devices in the antenna feeder component A2 representative antennas link It closes, these passive devices include but is not limited to cable, connector, coupler, combiner.
3. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: be input to described support Transmitting signal in device circuit (B) radiofrequency signal that disappears is through RF switch (B3), modulation circuit (3), circulator (4) and inter-modulated signal The intermodulation letter that identical as the passive intermodulation signal frequency, amplitude is different and phase is different is produced after generator (B2) processing Number, and single 3 order component for receiving frequency range or single 5 order component or single higher order component of degree n n are fallen into the inter-modulated signal, Or 3 order components or 5 order components of multiple and different frequency points or the higher order time of multiple and different frequency points of multiple and different frequency points divide Amount, or have amplitude relation between the even higher order component of 3 order components, 5 order components and phase relation and described double simultaneously Single 3 order component for receiving frequency range or single 5 rank point are fallen into the passive intermodulation signal that work device (A0) and its antenna link generate 5 order components or more of 3 order components or multiple and different frequency points of amount or single higher order component of degree n n or multiple and different frequency points The higher order component of degree n n of a different frequent points, or have the amplitude between the even higher order component of 3 order components, 5 order components simultaneously Relationship and phase relation are almost the same；
And it is coupled to the power for receiving signal and passive intermodulation signal in the radiofrequency signal of Canceller circuit (B) in the intermodulation The amplitude of the inter-modulated signal generated on signal generator (B2) is much smaller than the amplitude of above-mentioned passive intermodulation signal, not to passive intermodulation Offset result has an impact；
Again by circulator (4) after inter-modulated signal reflection, through filter (5), and the amplitude of amplitude modulated phase converter (B1) Adjustment and phase adjustment, the primary path of coupling output to the second coupler (B5) are formed and are fallen into the passive intermodulation signal Receive frequency range and have that the component frequencies at certain frequency interval are identical, amplitude is identical and the intermodulation of opposite in phase is supported with signal is received Disappear signal, and the component that reception frequency range is fallen into the intermodulation offseting signal and the passive intermodulation signal is offset, after counteracting Passive intermodulation signal is less than or equal to passive intermodulation preset value；It the transmitting signal in duplexer (A0) and its antenna link and connects simultaneously The collection of letters number normal operation in duplexer (A0) and its antenna link.
4. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: the digital processing Unit (E) is as follows according to emission signal frequency information calculation method:
The digital processing element (E) is first depending on emission signal frequency information, calculates associated passive intermodulation signal Frequency information, and be converted into the filtering parameter of passive intermodulation signal, then according to receive signal frequency, bandwidth information with Passive intermodulation signal frequency, bandwidth information acquire the frequency interval between them, the corresponding digital filtering mode of reselection and product The mode of dividing, the final amplitude detection realized to passive intermodulation signal；Then by the detected amplitude and nothing of the passive intermodulation signal Source intermodulation preset value compares；
When the detected amplitude is less than or equal to the preset value, the Canceller circuit (B) does not generate intermodulation offseting signal, no The passive intermodulation index of the duplexer (A0) and its antenna link is had an impact；
When the detected amplitude is greater than the preset value, adjustment of the Canceller circuit (B) to its amplitude and phase is controlled Produce that, amplitude identical as the passive intermodulation signal frequency of the duplexer (A0) and its antenna link be identical and opposite in phase Intermodulation offseting signal is offset with the passive intermodulation signal in the radiofrequency signal, and keeps this according to passive intermodulation signal Amplitude detection result real-time monitoring described in Canceller circuit (B) amplitude and phase make passive intermodulation signal cancellation result be less than etc. In the working condition of the preset value.
5. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: the digital processing Unit (E) obtains transmitting signal, conversion by transmitting signal frequency detecting circuit (E1) from the transmit circuit unit (F) of described device For digital signal, inputs digital processing element (E) and carry out frequency discrimination processing, obtain associated transmissions signal frequency information, and by emitting Signal and the duplex frequency separation received between signal calculate correspondingly received signal frequency information；Or pass through digital processing element (E) information interactive interface in is directly obtained from the input information of the device；The digital processing element (E) generates triggering letter Number output to transmit circuit unit (F) to trigger transmit circuit unit (F) generate radiofrequency signal.
6. the device of adaptive cancellation passive intermodulation signal according to claim 3, it is characterised in that: motivate the duplex Device (A0) and its antenna link generate the signal of passive intermodulation signal and the inter-modulated signal generator (B2) are motivated to generate intermodulation The signal of signal be it is homologous, derive from the transmitting signal of transmit circuit unit (F), thus passive device generate it is passive mutually The frequency for the inter-modulated signal for adjusting signal and inter-modulated signal generator (B2) to generate is identical, bandwidth is identical；The antenna link be from Duplexer (A0) antenna opening is to antenna (A1) this section of link, single or multiple nothings in antenna feeder component (A2) the representative antennas link The combination of source device, these passive devices include but is not limited to cable, connector, coupler, combiner；The transmitting signal by Multi-tone signal is constituted or is made of multicarrier modulated signal.
7. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: when the duplexer (A0) or antenna feeder component (A2) or antenna (A1) individually generate or multiple passive devices at the same generate and be formed by stacking with connect It collects mail and only has single 3 rank or single 5 rank or single higher order component of degree n n in the passive intermodulation signal for number having certain frequency interval Fall into the frequency acceptance band of duplexer (A0) and cause from duplexer (A0) receiving port test passive intermodulation index be not achieved it is pre- The nothing behind the second primary path port if value requires, to make the second coupler (B5) after the duplexer (A0) receiving port The mutual tone pitch in source meets preset value requirement: the maximum for the intermodulation offseting signal that the inter-modulated signal generator (B2) can be generated Amplitude, which is greater than to drop into the duplexer (A0) and its passive intermodulation signal of antenna link, receives frequency range respective frequencies The amplitude of single component；
When the duplexer (A0) or antenna feeder component (A2) or antenna (A1) individually generate or multiple passive devices while generating And be formed by stacking with receive signal have in the passive intermodulation signal at certain frequency interval only 3 ranks of multiple and different frequencies or 5 ranks of multiple and different frequencies or the higher order component of degree n n of multiple and different frequencies fall into the frequency acceptance band of duplexer (A0) and cause from When preset value requirement is not achieved in the passive intermodulation index of duplexer (A0) receiving port test, to receive the duplexer (A0) Passive intermodulation value behind second primary path port of the second coupler (B5) behind port meets preset value requirement: the intermodulation letter The maximum amplitude of the intermodulation offseting signal for the correspondence passive intermodulation component frequencies that number generator (B2) can be generated is greater than described The amplitude for receiving multiple respective frequencies components of frequency range is dropped into duplexer (A0) and its passive intermodulation signal of antenna link； Phase relation in the inter-modulated signal generated on the inter-modulated signal generator (B2) between multiple specific order components with it is described Phase relation in the passive intermodulation signal that duplexer (A0) and its antenna link generate between multiple specific order components is basic Unanimously；
When the duplexer (A0) or antenna feeder component (A2) or antenna (A1) individually generate or multiple passive devices while generating And what is be formed by stacking has 3 ranks, 5 ranks or higher order time point with receiving signal and have in the passive intermodulation signal at certain frequency interval simultaneously Amount falls into the frequency acceptance band of duplexer (A0) and all causes from the passive intermodulation index that duplexer (A0) receiving port is tested up to not When being required to preset value, behind the second primary path port to make the second coupler (B5) after the duplexer (A0) receiving port Passive intermodulation value meet preset value requirement: the correspondence passive intermodulation component frequency that the inter-modulated signal generator (B2) can be generated The maximum amplitude of the intermodulation offseting signal of rate is greater than the passive intermodulation signal of the duplexer (A0) and its antenna link In drop into receive frequency range multiple respective frequencies components amplitude；The intermodulation letter generated on the inter-modulated signal generator (B2) Amplitude relation and phase relation and the duplexer (A0) and its antenna link in number between multiple specific order components generate Passive intermodulation signal in magnitude relation between multiple specific order components and phase relation it is almost the same.
8. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: when passive intermodulation is examined Radiofrequency signal in slowdown monitoring circuit (D) is excessive when causing link obstructions, and digital processing element (E) will reduce passive intermodulation detection circuit (D) link gain so as to normally handle receive signal and stop detect passive intermodulation signal amplitude；When passive intermodulation detects electricity When road (D) is not blocked, the digital processing element (E) is to be treated next during carrying out the calculating of passive intermodulation amplitude Include passive intermodulation signal in the signal of passive intermodulation detection circuit (D) and receives signal and passive intermodulation signal and connect There is certain frequency interval between the collection of letters number.
9. the device of adaptive cancellation passive intermodulation signal according to claim 4, it is characterised in that: the digital processing The method of unit (E) calculating passive intermodulation signal amplitude are as follows:
Digital processing element (E) is first depending on the frequency that emission signal frequency information calculates associated passive intermodulation signal Then information acquires the frequency between them according to reception signal frequency, bandwidth information and passive intermodulation signal frequency, bandwidth information Rate interval, and select suitable algorithm to calculate passive intermodulation signal amplitude according to the frequency interval；
The algorithm for calculating passive intermodulation signal amplitude is including but not limited to direct filter integration method and region filtering integration method:
The direct filter integration method, which refers to, to be filtered according to passive intermodulation signal bandwidth Direct Digital and integrates amplitude of asking, at this time institute The frequency interval that passive intermodulation signal drops into each order component for receiving frequency range and receives between signal is stated to be greater than equal to nothing For digital filter passband to the intermediate zone bandwidth of stopband, this frequency interval is use in the digital filtering algorithm of source inter-modulated signal The foundation of direct filter integration method；
The region filtering integration method refers to that passive intermodulation signal bandwidth is divided into several subbands is wide, according to the wide progress of each subband Digital filtering simultaneously integrates amplitude of asking, then the corresponding amplitude of all subband width is carried out the cumulative entire signal amplitude of acquisition, at this time institute The frequency interval stating each order component and receiving between signal is greater than the digital filtering equal to each order component side subband signal For device passband to the intermediate zone bandwidth of stopband, this frequency interval is the foundation using region filtering integration method.
10. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that:
The a port of the Canceller circuit (B) passes through the antenna chain after the first coupler (A) and duplexer (A0) antenna opening Road connection, or pass through the transmitting link connection before the first coupler (A) and duplexer (A0) emission port；The Canceller electricity Another port on road (B) passes through the link connection after the second coupler (B5) and duplexer (A0) receiving port；Described second First primary path port of coupler (B5) connect with duplexer (A0) receiving port and connects distance and need to control in 0 to 1 meter of model In enclosing, specific length is offset optimum efficiency by passive intermodulation and is determined, the second primary path port of the second coupler (B5) and passive mutual The rf inputs connection of detection circuit (D) is adjusted, the coupling port of the second coupler (B5) connects Canceller circuit (B)；First The coupling port of coupler (A) is positive coupling port relative to transmitting signal；The load power of first coupler (A) need to be greater than The bandwidth of the maximum transmission power peak value of the device, the first coupler (A) need to include transmitting frequency range, the frequency of the first coupler (A) It is related and need to be within the scope of certain threshold value with interior gain fluctuation and transmitting frequency range；The passive intermodulation of first coupler (A) refers to Reference symbol closes the passive intermodulation index request in claim 2 to antenna feeder component (A2)；The coupling port phase of second coupler (B5) It is reverse coupled port for receiving signal；The bandwidth of second coupler (B5) need to be comprising receiving frequency range, the second coupler (B5) Frequency band in gain fluctuation to receive frequency range related and need to be within the scope of certain threshold value；Canceller circuit (B's) holds Carry the difference that power threshold need to be more than or equal to the power threshold of the first coupler (A) and the degree of coupling of the first coupler (A)； To make inter-modulated signal generator (B2) in Canceller circuit (B) that passive intermodulation offseting signal can be generated, load in the Canceller The minimum value of the transmitting signal power of circuit (B) need to be greater than certain power threshold.
11. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that:
Passive intermodulation detection circuit (D) includes low-noise amplifier, down conversion module, high-speed AD converter, noise amplifier Input terminal be electrically connected with the receiving port of duplexer (A0), the downconverted module of the output end of noise amplifier and high speed analog-digital conversion The input terminal of converter is electrically connected, and the output end of high-speed AD converter is electrically connected with the input terminal of digital processing element (E)；
The gain of the passive intermodulation detection circuit (D) is by the passive intermodulation preset value of demand, passive intermodulation detection circuit (D) The minimum sampled power of high-speed AD converter, chain noise factor etc. determine；The reception of the passive intermodulation detection circuit (D) The maximum value of signal power is more than or equal to the maximum receiving signal power of the practical corresponding communication standard defined of the device.
12. the device of adaptive cancellation passive intermodulation signal according to claim 5, it is characterised in that: at the number Reason unit (E) has at least one information interactive interface, and effect is downloaded including but not limited to program, configuration information input, far Journey alarm and maintenance；The configuration information for wherein needing to input includes present apparatus transmitted signal bandwidth and frequency range, receives 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；The digital processing element (E) can obtain transmitting letter by information interactive interface Number frequency information and receive signal frequency information；The information interactive interface can also carry out data with internet backstage resource Interaction: the passive intermodulation value in the equipment running process, the experience curve that passive intermodulation value changes over time, Yi Jiwu are uploaded The status information of each modular circuit in the inter-modulated signal adaptive cancellation device of source；Or the passive intermodulation letter after downloading complex optimum Number preset value and the curve changed over time；
At least there are two interfaces: an interface effect between the digital processing element (E) and passive intermodulation detection circuit (D) It is the sampled signal for obtaining passive intermodulation detection circuit (D) high speed analog-digital converter, to carry out the number of passive intermodulation signal Word filtering and amplitude calculate；The effect of another interface is the parameter by bus configuration passive intermodulation detection circuit (D)；
When the method that the digital processing element (E) obtains the emission signal frequency information and receive signal frequency information is benefit When with transmitting signal frequency detecting circuit (E1), then emit the prevention at radio-frequency port and the transmit circuit unit of signal frequency detecting circuit (E1) (F) the somewhere connection of transmitting chain road in, transmitting signal frequency detecting circuit (E1) pass through at high-speed AD converter and the number Manage unit (E) connection；There are one interface, effects between digital processing element (E) and transmitting signal frequency detecting circuit (E1) simultaneously It is by the parameter, such as local frequency, link gain etc. of bus configuration transmitting signal frequency detecting circuit (E1), the bus includes But it is not limited to I2C bus, spi bus；
The digital processing element (E) has at least one information interactive interface, and effect is downloaded including but not limited to program, matched Set information input, remote alarm and maintenance；The configuration information for wherein needing to input include present apparatus transmitted signal bandwidth and frequency range, Receive the order and band information, passive intermodulation signal of signal bandwidth and frequency range, dominant interference component in passive intermodulation signal Preset value and the curve changed over time, maximum counteracting number；The digital processing element (E) can be connect by information exchange Mouth obtains emission signal frequency information and receives signal frequency information；The information interactive interface can also be with internet backstage Resource carries out data interaction: uploading the passive intermodulation value in the equipment running process, the warp that passive intermodulation value changes over time Test the status information of each modular circuit in curve and passive intermodulation signal adaptive canceller；Or downloading complex optimum It rear passive intermodulation signal preset value and changes over time；
The digital processing element (E) includes at least the logical process and calculation process device for having digital signal processing function, For the reception of digital signal, algorithm process, the output of digital signal, control and the output for configuring signal etc., at the logic Reason is with calculation process device including but not limited to Field Programmable Gate Array Devices, central processing unit, digital signal processor；Institute It includes but is not limited to Ethernet interface, optical fiber interface, RS- that the hardware for stating the information interactive interface of digital processing element (E), which is constituted, 485 bus interface；The digit range of digital analog converter in the digital processing element (E) is between 10~18, and at least There are 3 digital analog converters.
13. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: the Canceller Modulation circuit (3) one end in circuit (B) is directly connected to the coupling port of the first coupler (A), or passes through RF switch (B3) coupling port of the first coupler (A) is connected；The other end passes through circulator (4) connection inter-modulated signal generator (B2)；Mutually Adjust signal generator (B2) by circulator (4) connection filter (5), amplitude modulation and phase modulation device one end (B1) connects filter (5), separately One end connects the coupling port of the second coupler (B5).
14. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: the Canceller Modulation circuit (3) one end in circuit (B) is directly connected to the coupling port of the first coupler (A), or passes through RF switch (B3) coupling port of the first coupler (A) is connected；The other end passes through circulator (4) connection inter-modulated signal generator (B2)；Mutually Adjust signal generator (B2) by circulator (4) connection amplitude modulation and phase modulation device (B1), one end of filter (5) connects amplitude modulation and phase modulation device (B1), the coupling port of other end connection the second coupler (B5).
15. the device of adaptive cancellation passive intermodulation signal according to claim 13, it is characterised in that:
The amplitude modulation and phase modulation device (B1) is made of modulation circuit (1) and phase modulation circuit (2)；Modulation circuit (1) includes at least 1 can Regulate and control attenuator；Phase modulation circuit (2) includes at least 2 controllable phase shifters；Modulation circuit (3) is by fixed attenuator or controllable Attenuator is constituted；The frequency bandwidth of the circulator (4) includes the transmitting frequency range and reception frequency range of the duplexer (A0)；It is described The working frequency range of amplitude modulation and phase modulation device (B1) includes the reception frequency range of the duplexer (A0), is increased in the frequency band of amplitude modulation and phase modulation device (B1) Benefit fluctuation is related to frequency range is received and need to be within the scope of certain threshold value；The passband frequency range of the filter (5) is duplexer (A0) reception frequency range, and the Out-of-band rejection index request of filter (5) is the Out-of-band rejection that frequency range is received by duplexer (A0) Index, the first coupler (A) degree of coupling, the second coupler (B5) degree of coupling, the first coupler (A) coupling in Canceller circuit (B) End is closed to determine to link load etc. between the second coupler (B5) coupled end；Modulation circuit (3) in the Canceller circuit (B) Load power is more than or equal to the load power threshold value of the Canceller circuit (B)；
Parallel connection of the inter-modulated signal generator (B2) including but not limited to single diode, single triode or multiple diodes It constitutes；Diode concrete model or triode concrete model and generation 3 rank of inter-modulated signal, 5 ranks or higher order inter-modulated signal Amplitude characteristic is related to phase characteristic, and the demand of the amplitude characteristic and phase characteristic is to send out in claim 2 inter-modulated signal The requirement of raw device (B2)；When using multiple same model diodes in parallel structures, inter-modulated signal intensity will be enhanced；Inter-modulated signal occurs The load power of device (B2) be more than or equal to Canceller circuit (B) the load power threshold value with from Canceller circuit (B) radio frequency Input port to inter-modulated signal generator (B2) link load difference.
16. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: described passive mutual Detection circuit (D) is adjusted to include at least low-noise amplifier, down conversion module, high-speed AD converter；The passive intermodulation detection Circuit (D) is connect by high-speed AD converter with the digital processing element (E)；
Received radiofrequency signal can be converted into intermediate-freuqncy signal by down conversion module, or received radiofrequency signal is converted into zero Intermediate-freuqncy signal；The sampling dynamic range of high-speed AD converter need to be greater than the maximum power value for receiving signal and passive intermodulation is default The difference being worth between corresponding performance number；
The minimum power that the passive intermodulation detection circuit (D) can sample is less than or equal to the corresponding passive intermodulation power of preset value Value, at the same the circuit can according to institute received radiofrequency signal general power range-adjusting link gain to avoid reception signal Or link obstructions caused by other signals；The gain of the passive intermodulation detection circuit (D) by demand passive intermodulation preset value, The minimum sampled power, chain noise factor of passive intermodulation detection circuit (D) high speed analog-digital converter determine；It is described passive mutual Adjusting the maximum value of the received signal power of detection circuit (D) to be more than or equal to the device, actually corresponding communication standard defined is most Big received signal power.
17. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that passive intermodulation detection Circuit (D) includes the low-noise amplifier (D1), rf filtering and low level signal amplification unit (D2), frequency mixer being sequentially connected electrically (D3), intermediate-frequency filter (D5), intermediate frequency amplifier (D6), analog-digital converter (D7), local oscillator (D4) are electrically connected with frequency mixer (D3) It connects；The input terminal of low-noise amplifier (D1) is electrically connected with the output end of duplexer (A0)；The output end of analog-digital converter (D7) It is electrically connected with the input terminal of digital processing element (E).
18. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that passive intermodulation detection Circuit (D) includes the low-noise amplifier (D1) being sequentially connected electrically, rf filtering and low level signal amplification unit (D2) and down coversion And AD conversion unit (D8)；The input terminal of low-noise amplifier (D1) is electrically connected with the output end of duplexer (A0)；Down coversion And the output end of AD conversion unit (D8) is electrically connected with the input terminal of digital processing element (E).
19. a kind of wireless transmitting-receiving equipments, which is characterized in that passive mutually including adaptive cancellation described in the claims 1-18 The device of signal is adjusted, the duplexer (A0) of the device of the adaptive cancellation passive intermodulation signal is wireless transmitting-receiving equipments Duplexer (A0)；The passive intermodulation detection circuit (D) of the device of adaptive cancellation passive intermodulation signal described in the present apparatus is multiplexed The component or unit of the receives link of wireless transmitting-receiving equipments, or increase passive intermodulation detection electricity newly in the wireless transmitting-receiving equipments Road (D)；The hair of transmit circuit unit (F) the multiplexing wireless transmitting-receiving equipments of the device of the adaptive cancellation passive intermodulation signal Penetrate the component or unit of link；The digital processing element (E) of the device of the adaptive cancellation passive intermodulation signal is multiplexed nothing The component or unit of the digital processing element of line transceiver, or increase digital processing element newly in the wireless transmitting-receiving equipments (E), the digital processing element (E) will be integrated in the complete machine program of wireless transmitting-receiving equipments；The adaptive cancellation is passive The first coupler (A) of the device of inter-modulated signal need to increase newly in the wireless transmitting-receiving equipments, and one primary path port and Duplexer (A0) antenna opening of wireless transmitting-receiving equipments connects or the duplexer of one primary path port and wireless transmitting-receiving equipments (A0) emission port connects, and the coupling port of the first coupler (A) is forward direction relative to wireless transmitting-receiving equipments transmitting signal Coupling port；The second coupler (B5) of the device of the adaptive cancellation passive intermodulation signal need to be set in the wireless receiving and dispatching Standby interior newly-increased, one primary path port connects with duplexer (A0) receiving port of wireless transmitting-receiving equipments and apart from need to control Within the scope of 0 to 1 meter, specific length offsets optimum efficiency by passive intermodulation and determines that the coupling port of the second coupler (B5) is opposite Receiving signal in the wireless transmitting-receiving equipments is reverse coupled port；The device of the adaptive cancellation passive intermodulation signal Canceller circuit (B) need to increase newly in the wireless transmitting-receiving equipments, and one rf inputs mouth and the first coupler (A) Coupling port is directly connected to, and the coupling port of another radio frequency output port and the second coupler (B5) is directly connected to, and is offset Amplitude, the phase controlling parameter that the amplitude adjustment of device circuit (B) is exported with phase adjustment by digital processing element (E) operation are real It is existing；The antenna feeder component (A2) and antenna (A1) of the device of the adaptive cancellation passive intermodulation signal are the wireless receiving and dispatching Correspondence component and antenna in the antenna link of equipment；
When wireless transmitting-receiving equipments have multiple receiving-transmitting chains, duplexer is both needed to a set of first coupling in each receiving-transmitting chain Device (A), the second coupler (B5) and Canceller circuit (B).
20. 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,
S1: transmitted signal bandwidth and frequency range are obtained by digital processing element (E), receive signal bandwidth and frequency range, passive intermodulation The order and band information of dominant interference component in signal, desired passive intermodulation preset value and the song changed over time The information such as line, the initial experience data of amplitude and phase, maximum counteracting number, and it is converted into corresponding configuration parameter；
S2: according to the configuration parameter in step S1 in relation to emitting signal, digital processing element (E) acquires the frequency of passive intermodulation signal It puts and is converted into respective digital filtering parameter and be stored into parameter allocation list；
S3: according to the configuration parameter of reception signal related in step S1, the configuration parameter of passive intermodulation signal and by step S2 The digital filter parameters of the passive intermodulation signal of middle acquisition, sampling of the digital processing element (E) to passive intermodulation detection circuit (D) Signal carries out digital filtering, filters out other signal components in addition to passive intermodulation signal, acquires the nothing for dropping into and receiving frequency range The range value of source inter-modulated signal；The algorithm for seeking range value include but is not limited to sectional integration method, basis signal bandwidth it is straight Connect integration method；
S4: judge current working status；The status indicator default value of the working condition is: " initial operation mode "；If work The status indicator value for making state is that " initial operation mode " then continues step S5-1, otherwise continues step S5-2；
S5-1: by the passive intermodulation preset value in passive intermodulation signal amplitude value that step S3 is obtained 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 S5-1 is "Yes", Canceller circuit (B) continues to keep inter-modulated signal generator and the Link high-isolation state between one coupler (A)；And return step S2；
S7: if the judging result of step S5-1 is "No", Canceller circuit (B) is switched to inter-modulated signal generator and first The low isolation state of link between coupler (A)；And by the status indicator value of working condition and it is set as " offsetting working condition "； Continue to execute step S8；
S5-2: by the passive intermodulation preset value in passive intermodulation signal amplitude value that step S3 is obtained and step S1 compare with Judge the passive intermodulation preset value whether passive intermodulation signal amplitude is less than or equal to；If the judging result of step S5-2 is "Yes", then hold mode, and return step S2；If the judging result of step S5-2 is "No", S8 is thened follow the steps；
S8: the range value of the passive intermodulation signal according to step S3 calculates the amplitude of Canceller circuit, phase adjustment value；And it dispenses To modulator, the phase converter in Canceller circuit, implement to offset；It completes that step will be continued back at after previous round counteracting processing Rapid S2 continues the counteracting processing of next round；It is described to ask amplitude, the including but not limited to two-dimentional minimum variance of algorithm of phase adjustment value Algorithm.
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