CN209088944U - The device of adaptive cancellation passive intermodulation signal - Google Patents

Abstract

The utility model relates to fields of communication technology, and in particular to a kind of device, method and the application apparatus of adaptive cancellation passive intermodulation signal.Including a coupler, duplexer, antenna, antenna feeder component, Canceller circuit, receiving unit, passive intermodulation detection circuit, digital processing element, transmit circuit unit and transceiver module；Antenna feeder component connection in the antenna opening of coupler and duplexer, antenna link, coupling port are connected with the prevention at radio-frequency port of Canceller circuit；The connection of the transmitting signal input part of the emitted circuit unit of transceiver module and duplexer, passive intermodulation detection circuit is connected by the reception signal output end of receiving unit and duplexer, the digital sampled signal output end of passive intermodulation detection circuit is connect with digital processing element, the control amount signal output end and Canceller circuit connection of digital processing element.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 it.

Description

The device of adaptive cancellation passive intermodulation signal

Technical field

The utility model relates to fields of communication technology, and in particular to a kind of device of adaptive cancellation passive intermodulation signal.

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 " utility model patent, which is divided into two-way for the primary carrier of unbalanced input unit, input two branches respectively, First via 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 Splitter, frequency multiplier, mixer and adjusting circuit.The control signal containing second group of high order intermodulation product is generated, finally will Two paths of signals superposition.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 On the contrary, offsetting inter-modulated signal.

The technical solution is in following deficiency: 1, the technical solution is not suitable for passive device, it does not account for non-linear unit The intermodulation value difference of internal different location is different, and for passive device, this species diversity is 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 " utility model patent, which includes the transmitting signal of high order intermodulation product from passive device output end direct-coupling, is led to Cross passive regulator adjustment be transmitted to the radio frequency link end reflection with inter-modulated signal generator after, again by passive tune The adjustment of device is saved, the counteracting with the inter-modulated signal identical frequency, level and opposite phase of aforesaid passive device transmitting signal is obtained Signal, the signal emit Signal averaging by coupler and Passive Nonlinear unit output end, realize that intermodulation is offset.

The technical solution is in following deficiency: 1, the technical solution uses passive regulator, and amplitude adjusted, phase adjusted are 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 on the structure of passive device In production technology, these methods generally require to increase additional cost, and thicken the electroplating technology of the coat of metal often Increase pollution.

Utility model content

The purpose of this utility model provides a kind of digital adaptation, for offsetting aiming at the defect of the prior art The device of passive intermodulation signal in wireless transceiver system, can be by wireless transmitting-receiving equipments and the device antenna mouth to antenna The passive intermodulation signal that this section of chain road other equipment or component generate drops into the adaptive of the component counteracting for receiving frequency range Offset the device of passive intermodulation signal.

A kind of device of adaptive cancellation passive intermodulation signal of the utility model, technical solution are as follows: it includes a coupling Clutch, duplexer, antenna, antenna feeder component, Canceller circuit, receiving unit, passive intermodulation detection circuit, digital processing element, Transmit circuit unit and transceiver module；

One primary path port of the coupler connect with the antenna opening of the duplexer, another primary path port with The coupling port of antenna feeder component connection, coupler in antenna link is connected with the prevention at radio-frequency port of Canceller circuit；

The connection of the transmitting signal input part of the emitted circuit unit of the signal sending end of the transceiver module and duplexer, institute The received unit of signal receiving end for stating transceiver module is connect with duplexer emission port；

The passive intermodulation detection circuit is connected by the reception signal output end of receiving unit and duplexer, described passive The digital sampled signal output end of intermodulation detection circuit and the digital sampled signal receiving end of digital processing element connect, the number The control amount signal output end of word processing unit is connect with the control amount signal input part of Canceller circuit.

It is more preferred, it further include transmitting signal frequency detecting circuit, the digital processing element includes transmitting signal receiving end Mouth, first data transmission port, the second data transmission port and information interactive interface, the radio frequency of the transmitting signal frequency detecting circuit Port is connect with transmit circuit unit, the hair of the transmitting signal output end and digital processing element of the transmitting signal frequency detecting circuit Penetrate receiver port connection, the first data transmission port of the digital processing element and the passive intermodulation detection circuit The connection of configuration information receiving port, the second data transmission port of the digital processing element and matching for transmitting signal frequency detecting circuit Confidence ceases receiving port connection.

More preferred, the Canceller circuit includes amplitude modulation and phase modulation device and inter-modulated signal generator, the amplitude modulation and phase modulation Device includes modulation circuit and phase modulation circuit, and the coupling port of amplitude modulation and phase modulation device one end and coupler is penetrated directly or by one Frequency switch connection, the other end are connect with inter-modulated signal generator.

It is more preferred, the Canceller circuit include amplitude modulation and phase modulation device, inter-modulated signal generator, the second modulation circuit, First circulator and the second circulator, the amplitude modulation and phase modulation device include the first modulation circuit and phase modulation circuit, the amplitude modulation and phase modulation One end of device and the second modulation circuit is all connected with the first circulator, and the other end of the amplitude modulation and phase modulation device and the second modulation circuit is equal Connect by the second circulator with inter-modulated signal generator, the coupling port of first circulator and coupler directly or by One RF switch connection.

More preferred, the passive intermodulation detection circuit includes local oscillator and is connected to its rf inputs mouth sum number in turn Low-noise amplifier, rf filtering and low level signal amplification unit, frequency mixer, intermediate frequency filtering between word sampled signal output port Device, intermediate frequency amplifier and analog-digital converter, the local oscillator output end are connect with frequency mixer.

More preferred, the passive intermodulation detection circuit includes being connected to its rf inputs mouth and digital sample in turn Low-noise amplifier, rf filtering and low level signal amplification unit and down coversion and analog-to-digital conversion list between signal output port Member.

More preferred, the passive intermodulation detection circuit passes through coupler from the link before receiving unit rf input port The rf inputs mouth of coupled RF signal, the receiving unit is connected by the primary path and duplexer receiving port of the coupler It connects.

More preferred, the passive intermodulation detection circuit is by power splitter or coupler from receiving unit Radiofrequency signal is obtained after one radio frequency amplifier, the rf inputs mouth of the receiving unit is connected with duplexer receiving port.

More preferred, the antenna link is this section of link from diplexer antenna mouth to antenna；

The combination of single or multiple passive devices in the antenna feeder component representative antennas link, these passive devices include but It is not limited to cable, connector, coupler, combiner.

The utility model has the following beneficial effects: 1, the passive intermodulation signal that wireless transmitting-receiving equipments can be generated and wireless receiving The passive intermodulation signal that any one equipment or component generate in link after hair device antenna mouth drops into point for receiving frequency range It measures and is offset on the radio frequency link in wireless transmitting-receiving equipments, and obtain in the receiving port of the passive device better than scheduled The result of passive intermodulation requirement index.

2, said effect 1 to reduce in the case where keeping the constant situation of system passive intermodulation index to wireless receiving and dispatching system The passive intermodulation index request of each device in system, to reduce the manufacturing cost of each passive device；

3, said effect 1 can also be used to eliminate due on duplexer or its antenna link the component or antenna with work Time increases and the influence of the passive intermodulation index deterioration of appearance, to extend the life cycle of the wireless transceiver system；

4, said effect 1 can also promote the index to preset value when the system needs more preferable passive intermodulation index More than.

5, when the passive intermodulation of the duplexer and its antenna link that carry out wireless transmitting-receiving equipments is offset and in the duplexer When receiving port obtains the result better than scheduled passive intermodulation requirement index, it will not believe emitting linearly performance and receiving Number linear properties generate adverse effect；

6, due to using active intermodulation bucking circuit, the adjusting of signal phase, amplitude is quantified, tune is improved Whole precision and accuracy；

7, due to the feedback link using passive intermodulation signal cancellation effect, so that passive intermodulation signal cancellation effect can With by real-time monitoring and adaptive dynamic adjusts, so as to when the power by the signal on the passive device or following link When grade, working frequency change and when environment temperature etc. changes, can dynamic, real-time response, make passive intermodulation Signal cancellation result meets target value.Thus important Practical significance.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of the device of adaptive cancellation passive intermodulation signal of the utility model embodiment.

Fig. 2 is the first structural schematic diagram of Canceller circuit B in the utility model embodiment.

Fig. 3 is second of structural schematic diagram of Canceller circuit B in the utility model embodiment.

Fig. 4 is the super-heterodyne architecture schematic diagram of passive intermodulation detection circuit D in the utility model embodiment.

Fig. 5 is the reception zero-if architecture schematic diagram of passive intermodulation detection circuit D in the utility model embodiment.

Fig. 6 is the neutralization effect figure of 3 order component of the utility model embodiment device.

Fig. 7 is the neutralization effect figure of 5 order components of the utility model embodiment device after the counteracting of 3 order components.

Fig. 8 is that a kind of simulation wireless receiving and dispatching of the device of adaptive cancellation passive intermodulation signal of the utility model embodiment is set Standby structural schematic diagram.

Fig. 9 is the tower top amplifying device of the device of the utility model embodiment the first adaptive cancellation passive intermodulation signal Structural schematic diagram.

Figure 10 is the schematic diagram of the utility model wireless transmitting-receiving equipments and multiple receiving-transmitting chains using one of example.

Figure 11 is the schematic diagram that the utility model wireless transmitting-receiving equipments have multiple receiving-transmitting chains using one of example.

Specific embodiment

The utility model is described in further detail in the following with reference to the drawings and specific embodiments, convenient for being well understood The utility model, but they do not constitute the utility model and limit.

Embodiment, as shown in Figure 1, the present embodiment is related to a kind of device of adaptive cancellation passive intermodulation signal, it includes One coupler A, Canceller circuit B, passive intermodulation detection circuit D, digital processing element E, duplexer A0, transmit circuit unit F, antenna feeder component A2, antenna A1, transceiver module G, receiving unit C；The emitted circuit unit F line of the signal of the transceiver module G Property amplification, generating the signal greater than 40dBm produces antenna feeder component A2 in the duplexer A0 and its antenna link and antenna A1 Raw passive intermodulation signal, and fall with that duplexer A0 receives frequency range in the passive intermodulation signal and have one with signal is received Determine the component of frequency interval, the different configurations according to transmitting signal can make the passive intermodulation signal fall into duplexer A0 reception The component of frequency range includes single 3 order component or single 5 order component, even or individually higher order component of degree n n or multiple and different frequencies 5 order component of 3 order components or multiple and different frequencies the higher order component of degree n n of multiple and different frequencies or has even or simultaneously 3 ranks point Amount and 5 order components even high-order component of degree n n.Transmitting signal is made of multi-tone signal or is made of multicarrier modulated signal.This reality It applies in example, transmitting frequency range is 925MHz to 960MHz, and reception frequency range is 880MHz to 915MHz；

The chain road coupled RF signal of antenna opening of the coupler A from duplexer A0, which exports, gives Canceller circuit B；Institute It states in radiofrequency signal comprising transmitting signal, passive intermodulation signal and reception signal；A primary path port of the coupler A with The antenna opening of the duplexer A0 connects, another primary path port is connect with the antenna feeder component A2 in antenna link, coupler A Coupling port connected with the prevention at radio-frequency port of Canceller circuit B；The coupler A is close to duplexer A0 antenna opening namely distance It is 0 meter；

For the antenna feeder component A2 and the passive devices such as antenna A1 in duplexer A0 and its antenna link, the passive intermodulation Cancel function effect first is that reduce to the passive intermodulation index request of the passive device, effect second is that elimination is described passive Device with the working time increase and occur passive intermodulation index deteriorate influence, effect third is that promoting the passive device Passive intermodulation index.

The Canceller circuit B will be believed using the transmitting signal in the radiofrequency signal of coupler A in the intermodulation Produce that identical as the passive intermodulation signal frequency in the radiofrequency signal, amplitude is different and phase is different on number generator B2 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；And it is coupled to reception signal and passive intermodulation in the radiofrequency signal of Canceller circuit B The amplitude for the inter-modulated signal that the power of signal generates on the inter-modulated signal generator B2 is much smaller than above-mentioned passive intermodulation signal Amplitude, passive intermodulation offset result is not had an impact；Pass through the amplitude of amplitude modulation and phase modulation device B1 after the inter-modulated signal reflection Adjustment and phase adjustment, and couple the primary path of output to coupler A, formed and fall into reception frequency in the passive intermodulation signal Section and with receive that signal has that the component frequencies at certain frequency interval are identical, amplitude is identical and the intermodulation of opposite in phase is offset and believed Number, which is offset with the component in the passive intermodulation signal, and the passive intermodulation signal after counteracting is less than Equal to passive intermodulation preset value；Simultaneously duplexer A0 and its transmitting signal in antenna link and receive signal in duplexer A0 and Normal operation in its antenna link.

When actual selection constitutes the specific device of inter-modulated signal generator B2, it should make to produce on the inter-modulated signal generator B2 The inter-modulated signal that identical as the passive intermodulation signal frequency in the radiofrequency signal, amplitude is different and phase is different is born, and should Single 3 order component for receiving frequency range or single 5 order component or single higher order component of degree n n or multiple are fallen into inter-modulated signal The higher order component of degree n n of 3 order components of different frequent points or 5 order components of multiple and different frequency points or multiple and different frequency points, Huo Zhetong When have amplitude relation between the even higher order component of 3 order components, 5 order components and phase relation and the duplexer A0 and its Fallen into the passive intermodulation signal that antenna link generates single 3 order component for receiving frequency range or single 5 order component or it is single more 5 order components of 3 order components or multiple and different frequency points of high-order component of degree n n or multiple and different frequency points or multiple and different frequency points Higher order component of degree n n, or there is magnitude relation and phase between the even higher order component of 3 order components, 5 order components to close simultaneously It is almost the same；And the intermodulation of correspondence passive intermodulation component frequencies that the inter-modulated signal generator B2 can be generated is supported The maximum amplitude of signal of disappearing is greater than in the duplexer A0 and its passive intermodulation signal of antenna link and drops into reception frequency range Multiple respective frequencies components amplitude.

Amplitude, the phase that the amplitude adjustment of amplitude modulation and phase modulation device B1 and phase adjustment are exported by digital processing element E operation Control parameter is realized；And the calculating of the amplitude, phase controlling parameter of digital processing element E needs passive intermodulation detection circuit D Sampled signal.

It motivates the duplexer A0 and its antenna link to generate the signal of passive intermodulation signal and motivates the inter-modulated signal Generator B2 generate inter-modulated signal signal be it is homologous, the transmitting signal of transmit circuit unit F is derived from, so passive device The passive intermodulation signal that part generates is identical with the frequency of the inter-modulated signal generator B2 inter-modulated signal generated, bandwidth is identical；It is described Antenna link be from duplexer A0 antenna opening to this section of link of antenna A1, it is single in the antenna feeder component A2 representative antennas link or The combination of multiple passive devices, these passive devices include but is not limited to cable, connector, coupler, combiner；The transmitting Signal 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, to make the passive intermodulation value of the duplexer A0 receiving port meet preset value requirement and making this The counteracting ability of device be greater than 20dB: the intermodulation offseting signal that the inter-modulated signal generator B2 can be generated most substantially Value, which is greater than to drop into the duplexer A0 and its passive intermodulation signal of antenna link, receives the single of frequency range respective frequencies The amplitude of component；

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, for the nothing for making the duplexer A0 receiving port The mutual tone pitch in source 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 can be produced The maximum amplitude of the intermodulation offseting signal of raw correspondence passive intermodulation component frequencies is greater than the duplexer A0 and its antenna chain The amplitude for receiving multiple respective frequencies components of frequency range is dropped into the passive intermodulation signal on road；The inter-modulated signal generator B2 Phase relation and the duplexer A0 and its antenna link in the inter-modulated signal of upper generation between multiple specific order components produce Phase relation in raw passive intermodulation signal between multiple specific order components 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 When value requires, to enable the passive intermodulation value of the duplexer A0 receiving port to meet preset value requirement and making the counteracting of the present apparatus Power is greater than 20dB: letter is offset in the intermodulation for the correspondence passive intermodulation component frequencies that the inter-modulated signal generator B2 can be generated Number maximum amplitude be greater than dropped into the duplexer A0 and its passive intermodulation signal of antenna link receive frequency range it is more The amplitude of a respective frequencies component；In the inter-modulated signal generated on the inter-modulated signal generator B2 multiple specific order components it Between the passive intermodulation signal that generates of amplitude relation and phase relation and the duplexer A0 and its antenna link in it is multiple specific Magnitude relation and phase relation between order component is almost the same.

The passive intermodulation detection circuit D, effect is the radiofrequency signal obtained after the duplexer A0 receiving port, and is passed through The amplification of adjustable gain control is crossed, down coversion is ultimately converted to digital signal and is input to digital processing element E, the duplexer Radiofrequency signal after A0 receiving port includes the component for receiving and falling into signal and passive intermodulation signal and receiving frequency range.

The prevention at radio-frequency port of the passive intermodulation detection circuit D is directly defeated from the radio frequency of receiving unit C by coupler Link couples radiofrequency signal before entrance, the rf inputs mouth of the receiving unit C passes through the primary path of the coupler at this time It is connected with duplexer A0 receiving port；The passive intermodulation detection circuit D or by power splitter or coupler from connecing It receives in unit C and obtains radiofrequency signal after some radio frequency amplifier, at this time the rf inputs mouth and duplexer of the receiving unit C A0 receiving port is directly connected to；Passive intermodulation detection circuit D is connected by high-speed AD converter and the digital processing element E It connects.Reception frequency is fallen into comprising receiving signal and passive intermodulation signal in the radiofrequency signal that the passive intermodulation detection circuit D is obtained The component of section；The reception dynamic range of the passive intermodulation detection circuit D is greater than the reception of input passive intermodulation detection circuit D Difference between the maximum power value and the corresponding performance number of passive intermodulation preset value of signal.

When the passive intermodulation detection circuit D is obtained from the link before the rf inputs mouth of receiving unit C by coupler When the number of winning the confidence, this coupler is referred to as receiving unit, and the gain of passive intermodulation detection circuit D is preset by the passive intermodulation of demand The coupling of value, the minimum sampled power of passive intermodulation detection circuit D high speed analog-digital converter, chain noise factor, receiving unit The parameters such as right determine；The maximum value of the received signal power of the passive intermodulation detection circuit D is greater than: the device is practical corresponding Communication standard defined maximum receiving signal power and the receiving unit degree of coupling difference；

When some radio frequency amplifier output end passes through power branch to the passive intermodulation detection circuit D from receiving unit C Device perhaps coupler obtain signal when this power splitter or coupler be referred to as receiving unit, passive intermodulation detection circuit D Gain by the passive intermodulation preset value of demand, passive intermodulation detection circuit D high speed analog-digital converter minimum sampled power, Chain noise factor, the signal dough softening of receiving unit, receiving unit C rf input port to this section of link of receiving unit increasing The parameters such as benefit determine；The maximum value of the received signal power of the passive intermodulation detection circuit D is greater than: the device is actually corresponding The maximum receiving signal power of communication standard defined plus receiving unit C rf input port to this section of link of receiving unit Gain, then subtract the signal dough softening of receiving unit.The reception dynamic range of the passive intermodulation detection circuit D is greater than 70dB； Passive intermodulation detection circuit D is connect by high-speed AD converter with the digital processing element E, and high-speed AD converter is adopted Duplexer A0 of the sample rate more than or equal to 2 times receives band bandwidth.

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.

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 depending on emission signal frequency information meter The frequency information of associated passive intermodulation signal is calculated, then according to reception signal frequency, bandwidth information and passive intermodulation Signal frequency, bandwidth information acquire the frequency interval between them, and select suitable algorithm to calculate nothing according to the frequency interval Source inter-modulated signal amplitude；The algorithm for calculating passive intermodulation signal amplitude is including but not limited to direct filter integration method and segmentation Filter integration method: the direct filter integration method, which refers to filter and integrate according to passive intermodulation signal bandwidth Direct Digital, seeks width Degree, the frequency interval that the passive intermodulation signal drops into each order component for receiving frequency range and receives between signal at this time are big Intermediate zone bandwidth of the digital filter passband to stopband in the digital filtering algorithm for being equal to passive intermodulation signal, this frequency interval It is the foundation using direct filter integration method；The region filtering integration method refer to passive intermodulation signal bandwidth is divided into it is several Subband is wide, according to the wide progress digital filtering of each subband and integrates and seeks amplitude, then the corresponding amplitude of all subband width is carried out tired Add and obtain entire signal amplitude, each order component described at this time and the frequency interval received between signal are greater than equal to each order For the digital filter passband of component side subband signal to the intermediate zone bandwidth of stopband, this frequency interval is using region filtering product The foundation of point-score.

In the present embodiment, the Canceller circuit B is connected by the antenna link after coupler A and duplexer A0 antenna opening It connects；A primary path port of the coupler A connect i.e. distance with duplexer A0 antenna opening as 0 meter, coupler A another Primary path port is connect with antenna feeder component A2, and the coupling port of coupler A connects Canceller circuit B；The insertion of the coupler A Loss is less than 0.2dB, and the degree of coupling range of coupler A is 30dB or so, and the coupling port of coupler A is relative to transmitting signal Positive coupling port, the mean power of coupler A carrying is greater than 100 watts and the peak power of carrying is greater than 1000 watts, coupling The bandwidth of clutch A includes transmitting frequency range, receives frequency range and Duplex Spacing between the two, gain fluctuation in the frequency band of coupler A To transmitting frequency range, to receive frequency range related and need to be within the scope of certain threshold value；The passive intermodulation index of coupler A be- 117dBm/Hz；The average power threshold value of the Canceller circuit B carrying is more than or equal to the peak power door of 20dBm and carrying Limit value is more than or equal to 30dBm；To enable inter-modulated signal generator B2 in Canceller circuit B to generate passive intermodulation offseting signal, add The minimum value for being loaded in the transmitting signal power of the Canceller circuit B need to be greater than 10 watts；

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 is less than 0.1dB and phase adjustment precision is small In 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；

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.The hardware of the information interactive interface of digital processing element E Constitute includes but is not limited to Ethernet interface, optical fiber interface, RS-485 bus interface.

In the present embodiment, the first scheme of the Canceller circuit B, as shown in Figure 2: in the Canceller circuit B The one end amplitude modulation and phase modulation device B1 is directly connected to the coupling port of coupler A, or the coupling by RF switch B3 connection coupler A Port, the other end connect inter-modulated signal generator B2；The amplitude modulation and phase modulation device B1 includes modulation circuit and phase modulation circuit；Wherein institute Modulation circuit 1a is stated to be made of controllable attenuator and fixed attenuator；Phase modulation circuit 2a includes at least 2 controllable phase shifters； The amplitude adjusting range of the amplitude modulation and phase modulation device B1 is greater than 30dB, and phase adjustment range is greater than 180 degree；The Canceller circuit B The average power threshold value of middle amplitude modulation and phase modulation device B1 carrying is more than or equal to 20dBm and the peak power threshold value of carrying is more than or equal to The working frequency range of 30dBm, the amplitude modulation and phase modulation device B1 include the transmitting frequency range and reception frequency range of the duplexer A0, amplitude modulation and phase modulation Gain fluctuation is related to transmitting frequency range, reception frequency range in the frequency band of device B1 and need to be within the scope of certain threshold value；

Further, the transmitting signal in the radiofrequency signal of the Canceller circuit B is input to through RF switch B3 or straight It connects to be input in amplitude modulation and phase modulation device B1, then amplitude modulated phase converter B1 after the power adjustment of modulation circuit 1a and is input to inter-modulated signal hair Raw device B2, makes inter-modulated signal generator B2 produce, amplitude identical as the passive intermodulation signal frequency in the radiofrequency signal not With the inter-modulated signal different with phase, and fallen into the inter-modulated signal reception frequency range single 3 order component or single 5 order component, 3 order components or multiple and different frequency points of single higher order component of degree n n or multiple and different frequency points 5 order components or it is multiple not With the higher order component of degree n n of frequency point, or there is the amplitude relation between the even higher order component of 3 order components, 5 order components simultaneously Single 3 rank for receiving frequency range is fallen into the passive intermodulation signal generated with phase relation and the duplexer A0 and its antenna link 3 order components or multiple and different frequencies of component or single 5 order component or single higher order component of degree n n or multiple and different frequency points 5 order components of point or the higher order component of degree n n of multiple and different frequency points, or have 3 order components, 5 order components even more high-order simultaneously Magnitude relation and phase relation between component of degree n n is almost the same；And reception signal and passive intermodulation signal in the radiofrequency signal The amplitude of inter-modulated signal that is generated on the inter-modulated signal generator B2 of power be much smaller than the width of above-mentioned passive intermodulation signal Value, does not have an impact passive intermodulation offset result；Again by amplitude modulation and phase modulation device B1 after the inter-modulated signal reflection, and through adjusting The amplitude of width phase converter B1 adjusts and phase adjustment, and through RF switch B3 or is directly inputted to coupler A, finally couples defeated Out to the primary path of coupler A, formed fallen into the passive intermodulation signal with the coupler A primary path receive frequency range and with Receiving signal has that the component frequencies at certain frequency interval are identical, amplitude is identical and the intermodulation offseting signal of opposite in phase, the intermodulation Offseting signal is offset with the component in the passive intermodulation signal, and the passive intermodulation signal after counteracting is less than or equal to passive mutual Adjust preset value；Simultaneously the transmitting signal in duplexer A0 and its antenna link and signal is received in duplexer A0 and its antenna link Middle normal operation；

In the present embodiment, the Canceller circuit B second scheme, as shown in Figure 3: the in the Canceller circuit B Two modulation circuits, 3 one end is connect by the first circulator 4 with the coupling port of coupler A, or can pass through the first circulator 4, RF switch B3 is connect with the coupling port of coupler A；The other end is connected by the second circulator 5 and inter-modulated signal generator B2 It connects；Amplitude modulation and phase modulation one end device B1 in the Canceller circuit B is connect by the second circulator 5 with inter-modulated signal generator B2； The other end is connect by the first circulator 4 with the coupling port of coupler A, or can pass through the first circulator 4, RF switch B3 is connect with the coupling port of coupler A；Second modulation circuit 3, effect are that inter-modulated signal generator B2 is made to bear one The radiofrequency signal of appropriate power；The amplitude modulation and phase modulation device B1 includes the first modulation circuit 1b and phase modulation circuit 2b, and effect is will be mutual Adjust signal generator B2 generate inter-modulated signal, carry out amplitude modulation, phase modulation processing, so as to duplexer A0 and its antenna in the present apparatus The passive intermodulation signal that link generates is offset；The first modulation circuit 1b includes at least 1 controllable attenuator；It is described Phase modulation circuit 2b includes at least 2 controllable phase shifters；Second modulation circuit 3 is by fixed attenuator or controllable attenuator It constitutes；The frequency bandwidth of first circulator 4 and the second circulator 5 includes the transmitting frequency range of the duplexer A0 and receives frequently Section；The amplitude adjusting range of the amplitude modulation and phase modulation device B1 is greater than 30dB, and phase adjustment range is greater than 180 degree, the amplitude modulation and phase modulation The working frequency range of device B1 includes the reception frequency range of the duplexer A0, gain fluctuation and reception frequency in the frequency band of amplitude modulation and phase modulation device B1 Duan Xiangguan and need to be within the scope of certain threshold value；The mean power door that the second modulation circuit 3 carries in the Canceller circuit B Limit value is more than or equal to 20dBm and the peak power threshold value of carrying is more than or equal to 30dBm；

Further, the transmitting signal being input in the Canceller circuit B radiofrequency signal is input to through the first circulator 4 Second modulation circuit 3 is input to the second modulation circuit 3 through RF switch B3 and the first circulator 4, then through the second amplitude modulation electricity Inter-modulated signal generator B2 is input to by the second circulator 5 after the power adjustment on road 3, produces inter-modulated signal generator B2 Inter-modulated signal identical as the passive intermodulation signal frequency in the radiofrequency signal, amplitude is different and phase is different, and the intermodulation Single 3 order component for receiving frequency range or single 5 order component or single higher order component of degree n n or multiple and different are fallen into signal The higher order component of degree n n of 3 order components of frequency point or 5 order components of multiple and different frequency points or multiple and different frequency points, or have simultaneously Amplitude relation and phase relation and the duplexer A0 and its antenna between the even higher order component of 3 order components, 5 order components Single 3 order component for receiving frequency range or single 5 order component or single higher order are fallen into the passive intermodulation signal that link generates 5 order components of 3 order components or multiple and different frequency points of component of degree n n or multiple and different frequency points or multiple and different frequency points it is higher Order component, or have magnitude relation and phase relation base between the even higher order component of 3 order components, 5 order components simultaneously This is consistent；And the power of reception signal and passive intermodulation signal in the radiofrequency signal produces on the inter-modulated signal generator B2 The amplitude of raw inter-modulated signal is much smaller than the amplitude of above-mentioned passive intermodulation signal, does not have an impact to passive intermodulation offset result； Amplitude modulation and phase modulation device B1, and the amplitude tune of amplitude modulated phase converter B1 are input to by the second circulator 5 after the inter-modulated signal reflection Whole and phase adjustment finally couples output to coupler by the first circulator 4 or by the first circulator 4 and RF switch B3 The primary path of A, formed with fallen into the passive intermodulation signal of the coupler A primary path receive frequency range and with reception signal have The component frequencies at certain frequency interval are identical, amplitude is identical and the intermodulation offseting signal of opposite in phase, the intermodulation offseting signal with Component in the passive intermodulation signal is offset, and the passive intermodulation signal after counteracting is less than or equal to passive intermodulation preset value； While the transmitting signal in duplexer A0 and its antenna link is normally transported in duplexer A0 and its antenna link with signal is received Make；

In the present embodiment, the inter-modulated signal generator B2 in the Canceller circuit B two schemes is including but not limited to list A diode, single triode or the in parallel of multiple diodes are constituted；Diode concrete model or triode concrete model with The amplitude characteristic for generating 3 rank of inter-modulated signal, 5 ranks or higher order inter-modulated signal is related to phase characteristic；Using multiple same models two When pole pipe parallel-connection structure, inter-modulated signal intensity will be enhanced；The load power of inter-modulated signal generator B2 is more than or equal to 20dBm.

In the present embodiment, the passive intermodulation detection circuit D includes at least down conversion module, high-speed AD converter；Under Received radiofrequency signal can be converted into intermediate-freuqncy signal by frequency-variable module；The sampling dynamic range of high-speed AD converter need to be greater than 70dB, the digit of analog-digital converter are 14, and duplexer A0 of the sampling rate more than or equal to 2 times receives band bandwidth；The nothing The minimum power that source intermodulation detection circuit D can be sampled is less than or equal to -115dBm, while the circuit can be penetrated according to institute is received The range-adjusting link gain of frequency total power signal is to avoid link obstructions caused by receiving signal or other signals；The nothing Passive intermodulation preset value, passive intermodulation detection circuit D high speed analog-digital converter of the gain of source intermodulation detection circuit D by demand Minimum sampled power, chain noise factor etc. determines；The maximum value of the received signal power of the passive intermodulation detection circuit D More than or equal to -50dBm.

The passive intermodulation detection circuit D can be converted radiofrequency signal using reception super-heterodyne architecture as shown in Figure 4 Analog-to-digital conversion is carried out again for intermediate-freuqncy signal, and passive intermodulation detection circuit D is by low-noise amplifier D1, rf filtering and small letter at this time Number amplifying unit D2, frequency mixer D3, local oscillator D4, intermediate-frequency filter D5, intermediate frequency amplifier D6, analog-digital converter D7 are constituted, wherein The passband frequency range of rf filtering and the filtering unit in low level signal amplification cells D 2 is the reception frequency range of duplexer A0.

The passive intermodulation detection circuit D can use reception zero-if architecture as shown in Figure 5 by radiofrequency signal It is converted to zero intermediate frequency signals and carries out analog-to-digital conversion again, passive intermodulation detection circuit D is by low-noise amplifier D1, rf filtering at this time And low level signal amplification cells D 2, down coversion and AD conversion unit D8 are constituted, wherein rf filtering and low level signal amplification cells D 2 In filtering unit passband frequency range be duplexer A0 reception frequency range, down coversion and AD conversion unit D8 effect be by radio frequency Signal is converted directly into zero intermediate frequency signals and carries out analog-to-digital conversion.

In the present embodiment, as shown in table 1:

Tone signal in the transmit circuit unit F there are two 43dBm constitutes the two-tone signal of a 46dBm, should Two-tone signal makes duplexer A0 and its antenna link produce passive intermodulation signal, and actually surveys in duplexer A0 receiving port 3 order component amplitudes are -94.7dBm in the passive intermodulation tried, and 5 order components are -124.8dBm, and 7 order components are in frequency spectrograph warm Under noise；Fallen into the duplexer A0 and its passive intermodulation signal of antenna link receive frequency range component be less than or equal to- The preset value of 112dBm, so mainly 3 rank passive intermodulations of optimization are bad, while 3 rank signals and 5 rank signal amplitudes difference 30.1dB；Inter-modulated signal caused by the particular diode selected at this time is in the test value of duplexer A0 receiving port: 3 ranks point Amount amplitude be -75.6dBm, and 5 order components be -106.3dBm, 7 order components under frequency spectrograph thermal noise, at this time 3 rank signals and 5 rank signal amplitudes differ 30.7dB；After passive intermodulation cancel function is opened, tested at this time in duplexer A0 receiving port 3 order components in passive intermodulation are as shown in fig. 6, amplitude is -119.6dBm, and 5 order components are as shown in fig. 7, be -130.8dBm, 7 ranks Component is under frequency spectrograph thermal noise；It can be seen that undesirable 3 order component of device passive intermodulation is caused to optimize 24.9dB, and 5 Order component also synchronizes optimised.At this point, the passive intermodulation signal drops into each order component for receiving frequency range and receives signal Between frequency interval be more than or equal to 200KHz.

The present apparatus can be applied to simulation wireless transmitting-receiving equipments and its antenna link and generate not to offset passive device 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 simulation wireless receiving and dispatching is set The standby including but not limited to equipment such as repeater, radio station, tower amplifier, the antenna link including but not limited to cable, Connector, coupler, combiner, antenna.

The example that the present embodiment device is applied to simulation 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 receiving unit of the receiving unit C multiplexing wireless transmitting-receiving equipments of the present apparatus C, the receiving unit C are made of low-noise amplifier C1, power splitter C2, power amplifier C3, wherein power splitter A power branch port of C2 is connected with the rf input port of passive intermodulation detection circuit D, power splitter C2 another Power branch port is connected with the rf inputs mouth of power amplifier C3, the power combiner port of power splitter C2 and low noise The delivery outlet of acoustic amplifier C1 connects；The passive intermodulation detection circuit D of the present apparatus need to be increased newly in wireless transmitting-receiving equipments；The present apparatus Transmit circuit unit F multiplexing wireless transmitting-receiving equipments transmit circuit unit F, the transmit circuit unit F is by power amplifier F1, coupler F2, power driving amplifier F3 are constituted, and wherein the coupling port of coupler F2 is with transmitting signal frequency detecting circuit E1's The connection of rf inputs mouth, coupler F2 are positive coupling port, a primary path end of coupler F2 relative to transmitting signal Mouth connection power amplifier F1, another primary path port connect power driving amplifier F3；The digital processing element E of the present apparatus It need to be increased newly in wireless transmitting-receiving equipments, a kind of corresponding " adaptive cancellation wireless receiving and dispatching system will be run in the digital processing element E The program of the method for passive intermodulation signal in system "；The coupler A of the present apparatus need to be increased newly in wireless transmitting-receiving equipments, the coupling The antenna opening of the duplexer A0 of a primary path port and wireless transmitting-receiving equipments of device A is directly connected to；The Canceller electricity of the present apparatus Road B need to be increased newly in wireless transmitting-receiving equipments, and the prevention at radio-frequency port of the Canceller circuit B and the coupling port of coupler A directly connect It connects, amplitude that amplitude, the phase adjustment of Canceller circuit B is exported by digital processing element E operation, phase controlling parameter are realized； Transceiver module G in the present apparatus is the transceiver module G in wireless transmitting-receiving equipments；The antenna feeder component A2 and antenna of the present apparatus A1 is the correspondence component and antenna of the wireless transmitting-receiving equipments outside antenna chain road.

In addition, the present embodiment described device applies an example in tower top amplifying device as shown in Figure 9: the present apparatus at this time Duplexer A0 be tower top amplifying device duplexer A0；The reception of the receiving unit C multiplexing tower top amplifying device of the present apparatus Unit C, the receiving unit C are made of low-noise amplifier C1, power splitter C2, received passband filter C3, wherein function A power branch port of rate splitter C2 is connected with the rf input port of passive intermodulation detection circuit D, power splitter C2 Another power branch port connected with the rf inputs mouth of received passband filter C3, the power of power splitter C2 closes Road port is connected with the delivery outlet of low-noise amplifier C1；The passive intermodulation detection circuit D of the present apparatus need to amplify in the tower top It is increased newly in device, it obtains radiofrequency signal, radio frequency letter from the receives link in tower top amplifying device by power splitter C2 Amplification number Jing Guo adjustable gain control, down coversion are ultimately converted to digital signal and are input to digital processing element E；The present apparatus Transmit circuit unit F is multiplexed the transmit circuit unit F of tower top amplifying device, and the transmit circuit unit F is by frequency discrimination coupler F1 And cable between duplexer A0 emission port and transceiver module G is constituted, the wherein coupling port and hair of frequency discrimination coupler F1 The rf inputs mouth connection of signal frequency detecting circuit E1 is penetrated, frequency discrimination coupler F1 is positive coupling port relative to transmitting signal, A primary path port of frequency discrimination coupler F1 connects duplexer A0 emission port, another primary path port connects transceiver module The emission port of G；The digital processing element E of the digital processing element E multiplexing tower top amplifying device of the present apparatus, the digital processing The program of " a kind of method of passive intermodulation signal in adaptive cancellation wireless transceiver system " corresponding in unit E will be integrated in tower top In the complete machine program of amplifying device；The coupler A of the present apparatus need to be increased newly in the tower top amplifying device, the coupler A's The antenna opening of the duplexer A0 of one primary path port and wireless transmitting-receiving equipments is directly connected to, and the coupling port of coupler A is opposite In the transmitting signal of the tower top amplifying device be positive coupling port；The Canceller circuit B of the present apparatus need to be put in the tower top It is increased newly in big device, the prevention at radio-frequency port of the Canceller circuit B and the coupling port of coupler A are directly connected to, Canceller circuit B Amplitude adjustment and phase adjustment export by digital processing element E operation amplitude, phase controlling parameter realization；The present apparatus In transceiver module G multiplexing tower top amplifying device in transceiver module G, the base station side transmitting-receiving outside the tower top amplifying device sets Standby antenna opening connect the interaction for carrying out radio frequency transmissions and receiving signal with transceiver module G, in addition transceiver module G and number Has an interface between processing unit E, to pass the control information of the base station side transceiver outside tower top amplifying device Pass the information interactive interface of digital processing element E；The antenna feeder component A2 and antenna A1 of the present apparatus are the tower top amplification dress Correspondence component and antenna in the antenna link set.

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: close to a coupler A and Canceller circuit B after each antenna opening of duplexer in each receiving-transmitting chain；

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 10: 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 11: entire link includes wireless transmitting-receiving equipments, and more Antenna A1-1, A1-2 ... ... and multiple component A2-1, A2-2 ... ...；The each receiving-transmitting chain of wireless transmitting-receiving equipments has one A passive intermodulation canceller connects, and the passive intermodulation of the generations such as duplexer, component, antenna, which drops into, on each branch link connects The component for receiving frequency range can be cancelled in a certain range；

After being installed on wireless transceiver system using the device that the utility model design is completed, fallen in link passive intermodulation signal When the component for entering to receive frequency range is -90dBm/Hz to -95dBm/Hz, described device can make passive intermodulation signal cancellation result big In 20dB, when falling into the component for receiving frequency range in link passive intermodulation signal better than -95dBm/Hz, described device can make passive Inter-modulated signal offset result is at least better than -115dBm/Hz.

It should be understood that the above is only the specific embodiments of the utility model, but the protection scope of the utility model It is not limited thereto, anyone skilled in the art can be thought easily in the technical scope disclosed by the utility model The change or replacement arrived, should be covered within the scope of the utility model.

Claims (9)

1. a kind of device of adaptive cancellation passive intermodulation signal, it is characterised in that: it includes coupler (A), a duplexer (A0), antenna (A1), antenna feeder component (A2), Canceller circuit (B), receiving unit (C), passive intermodulation detection circuit (D), number Processing unit (E), transmit circuit unit (F) and transceiver module (G)；

One primary path port of the coupler (A) connect with the antenna opening of the duplexer (A0), another primary path end It mouthful is connect with the antenna feeder component (A2) in antenna link, the prevention at radio-frequency port of the coupling port of coupler (A) and Canceller circuit (B) Connection；

The transmitting signal input port of the duplexer (A0) is connect with the radio frequency output port of transmit circuit unit (F), described The reception signal output port of duplexer (A0) is connect with the rf inputs mouth of receiving unit (C)；The radio frequency of transceiver module (G) Signal output end connects the rf inputs mouth of transmit circuit unit (F), and the RF signal input end of transceiver module (G) connects Receive the radio frequency output port of unit (C)；

The passive intermodulation detection circuit (D) is connect by receiving unit (C) with the reception signal output end of duplexer (A0), institute The digital sampled signal of the digital sampled signal output end and digital processing element (E) of stating passive intermodulation detection circuit (D) receives End connection, the control amount signal output end of the digital processing element (E) and the control amount signal input part of Canceller circuit (B) Connection.

2. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: further include transmitting letter Number frequency-discriminating circuit (E1), the digital processing element (E) include transmitting receiver port, first data transmission port, second Data transmission port and information interactive interface, the prevention at radio-frequency port and transmit circuit unit of transmitting signal frequency detecting circuit (E1) (F) it connects, the transmitting signal output end and the transmitting signal of digital processing element (E) of transmitting signal frequency detecting circuit (E1) connect The connection of receiving end mouth, the first data transmission port of the digital processing element (E) and matching for passive intermodulation detection circuit (D) Confidence ceases receiving port connection, the second data transmission port and transmitting signal frequency detecting circuit of the digital processing element (E) (E1) configuration information receiving port connection.

3. the device of adaptive cancellation passive intermodulation signal according to claim 1, which is characterized in that the Canceller electricity Road (B) includes amplitude modulation and phase modulation device (B1) and inter-modulated signal generator (B2), and the amplitude modulation and phase modulation device (B1) includes modulation circuit (1a) and phase modulation circuit (2a), the coupling port of described amplitude modulation and phase modulation device one end (B1) and coupler (A) are directly or by one RF switch (B3) connection, the other end are connect with inter-modulated signal generator (B2).

4. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: the Canceller electricity Road (B) includes amplitude modulation and phase modulation device (B1), inter-modulated signal generator (B2), the second modulation circuit (3), the first circulator (4) and Two circulators (5), the amplitude modulation and phase modulation device (B1) include the first modulation circuit (1b) and phase modulation circuit (2b), the amplitude modulation and phase modulation One end of device (B1) and the second modulation circuit (3) is all connected with the first circulator (4), the amplitude modulation and phase modulation device (B1) and the second amplitude modulation The other end of circuit (3) passes through the second circulator (5) and connect with inter-modulated signal generator (B2), first circulator (4) It is connect with the coupling port of coupler (A) directly or by a RF switch (B3).

5. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: the passive intermodulation Detection circuit (D) includes local oscillator (D4) and is connected in turn between its rf inputs mouth and digital sampled signal output port Low-noise amplifier (D1), rf filtering and low level signal amplification unit (D2), frequency mixer (D3), intermediate-frequency filter (D5), intermediate frequency The output end of amplifier (D6) and analog-digital converter (D7), the local oscillator (D4) is connect with frequency mixer (D3).

6. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: the passive intermodulation Detection circuit (D) includes the low noise amplification being connected in turn between its rf inputs mouth and digital sampled signal output port Device (D1), rf filtering and low level signal amplification unit (D2) and down coversion and AD conversion unit (D8).

7. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: the passive intermodulation Detection circuit (D) passes through coupler from the link couples radiofrequency signal before receiving unit (C) rf input port, the receiving unit (C) rf inputs mouth is connected by the primary path of the coupler with duplexer (A0) receiving port.

8. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: the passive intermodulation Detection circuit (D) obtains radio frequency after a radio frequency amplifier in receiving unit (C) by power splitter or coupler The rf inputs mouth of signal, the receiving unit (C) is connected with duplexer (A0) receiving port.

9. the device of adaptive cancellation passive intermodulation signal according to claim 1, it is characterised in that: the antenna link For from duplexer (A0) antenna opening to antenna (A1) this section of link；

The combination of single or multiple passive devices in antenna feeder component (A2) the representative antennas link, these passive devices include but It is not limited to cable, connector, coupler, combiner.