CN104104455A - Passive intermodulation position detection method and device - Google Patents
Passive intermodulation position detection method and device Download PDFInfo
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- CN104104455A CN104104455A CN201310120696.7A CN201310120696A CN104104455A CN 104104455 A CN104104455 A CN 104104455A CN 201310120696 A CN201310120696 A CN 201310120696A CN 104104455 A CN104104455 A CN 104104455A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B17/00—Monitoring; Testing
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Abstract
The invention discloses a passive intermodulation position detection method and device. The method includes the following steps: emitting passive intermodulation test signals and acquiring passive intermodulatoin signals; and according to a time relation of the passive intermodulation signals and the passive intermodulation test signals, determining a corresponding relation of the size and location of passive intermodulation. Through the technical scheme, the fault maintenance and detection cost can be reduced, delivery speed is improved, fault diagnosis efficiency is improved, self-diagnosis function of the device is realized and network quality and customer satisfaction degree are improved.
Description
Technical field
The present invention relates to field of mobile communication, particularly relate to a kind of passive intermodulation method for detecting position and device.
Background technology
In wireless communication system, often there will be the reception end to make an uproar is elevated, and the situation that causes receptivity to decline, wherein having very major part is because antenna-feedback system passive intermodulation index is bad, the intermodulation product transmitting just in time falls into and receives in signal band, cause and receive raising that the end makes an uproar, impact receives index, and then cause KPI Key Performance Indicator (the Key Performance Indicator of Wi-Fi, referred to as KPI) worsen, as coverage is shunk, cutting off rate improves, handover success rate reduction etc., the final network quality that affects, cause customer complaint, have a strong impact on customer satisfaction.
The problem of antenna-feedback system is often difficult for detection and diagnosing, even if found, later stage solution also will expend a large amount of manpower and materials, increases engineering and maintenance cost.Therefore, need to just find at engineering phase, locate, and address the above problem, to reduce engineering cost, improve payment speed, improve network quality and customer satisfaction.
Summary of the invention
The invention provides a kind of passive intermodulation method for detecting position and device, feeder line or the bad position of equipment passive intermodulation are difficult for when solving passive intermodulation input in prior art the problem of detection and diagnosing.
The invention provides a kind of passive intermodulation method for detecting position, comprising: transmitting passive cross modulation test signal, and gather passive intermodulation signal; According to the time relationship of passive intermodulation signal and passive cross modulation test signal, determine the size of passive intermodulation and the corresponding relation of present position.
Preferably, before transmitting passive cross modulation test signal, said method also comprises: signalization tranmitting frequency and frequency reception signal.
Preferably, according to the time relationship of passive intermodulation signal and passive cross modulation test signal, determine that the size of passive intermodulation and the corresponding relation of present position specifically comprise: determine that passive intermodulation signal is with respect to the very first time function of passive cross modulation test signal, and the size of definite passive intermodulation; According to transmitting chain time delay value, receiver time delay value and very first time function, determine passive intermodulation signal at antenna-feedback system second function of time from passive intermodulation point to base station port; According to second function of time and signal velocity, determine the location-dependent function of passive intermodulation signal, and determine the size of passive intermodulation and the corresponding relation of present position according to the size of location-dependent function and passive intermodulation.
Preferably, signalization tranmitting frequency and frequency reception signal specifically comprise: according to the transmitting start-stop frequency of base station, determine that the M rank intermodulation start-stop frequency of base station and the receive frequency of base station exist common factor, wherein, M is positive integer; Signalization tranmitting frequency is the transmitting start-stop frequency of base station; Signalization receive frequency is the frequency of M rank inter-modulated signal, and wherein, the frequency of M rank inter-modulated signal falls into the receive frequency range of base station.
Preferably, determine that passive intermodulation signal is with respect to the very first time function of passive cross modulation test signal, and the size of definite passive intermodulation specifically comprises: by passive intermodulation signal X(n) and passive cross modulation test signal Y(n) carry out correlation processing, determine passive intermodulation signal X(n) and passive cross modulation test signal Y(n) time correlation function
wherein, m=0 ... M-1, j is convolutional calculation; According to time correlation function, obtain a plurality of relevant peaks C(K), wherein, the passive intermodulation of each relevant peaks and corresponding diverse location, according to passive cross modulation test signal Y(n) total amplitude
determine relevant peaks C(K) corresponding passive intermodulation size
wherein, K is relevant peaks C(K) corresponding counting; According to time correlation function, determine passive intermodulation signal X(n) with respect to passive cross modulation test signal Y(n) very first time function
wherein, f
sfor sampling rate.
Preferably, according to transmitting chain time delay value, receiver time delay value and very first time function, determine that second function of time from passive intermodulation point to base station port specifically comprises passive intermodulation signal at antenna-feedback system:
According to transmitting chain time delay value, receiver time delay value and very first time function, obtain passive intermodulation signal at antenna-feedback system second function of time from passive intermodulation point to base station port
wherein, t is passive intermodulation signal at antenna-feedback system from passive intermodulation point to base station port two-way time, and k is passive intermodulation size scaled values, τ
1for base station dispatch from the factory before the time delay value of transmitting chain of calibration, prolong τ
2for base station dispatch from the factory before the time delay value of receiver of calibration.
Preferably, according to second function of time and signal velocity, determine the location-dependent function of passive intermodulation signal, and determine that according to the size of location-dependent function and passive intermodulation the size of passive intermodulation and the corresponding relation of present position specifically comprise: according to second function of time and signal velocity, determine location-dependent function P (d)=v * P (the t)=v of passive intermodulation signal
f* c * P (t), wherein, v is signal velocity, v
ffor the relative propagation constant of cable, c is the light velocity; According to relevant peaks C(K) corresponding passive intermodulation size
with location-dependent function P (d)=v * P (t)=v
f* c * P (t) determines the size of passive intermodulation and the corresponding relation of present position.
The present invention also provides a provenance intermodulation position detecting device, comprising: transmitting acquisition module, for launching passive cross modulation test signal, and gathers passive intermodulation signal; Processing module, for according to the time relationship of passive intermodulation signal and passive cross modulation test signal, determines the size of passive intermodulation and the corresponding relation of present position.
Preferably, said apparatus also comprises: module is set, for signalization tranmitting frequency and frequency reception signal.
Preferably, above-mentioned processing module specifically comprises: very first time determination module, for determining that passive intermodulation signal is with respect to the very first time function of passive cross modulation test signal, and calculates the size of passive intermodulation; The second time determination module, for according to transmitting chain time delay value, receiver time delay value and very first time function, determine passive intermodulation signal at antenna-feedback system second function of time from passive intermodulation point to base station port; Position determination module, for according to second function of time and signal velocity, determines the location-dependent function of passive intermodulation signal, and determines the size of passive intermodulation and the corresponding relation of present position according to the size of location-dependent function and passive intermodulation.
Preferably, arrange module specifically for: according to the transmitting start-stop frequency of base station, determining that the M rank intermodulation start-stop frequency of base station and the receive frequency of base station exist occurs simultaneously, and wherein, M is positive integer; Signalization tranmitting frequency is the transmitting start-stop frequency of base station; Signalization receive frequency is the frequency of M rank inter-modulated signal, and wherein, the frequency of M rank inter-modulated signal falls into the receive frequency range of base station.
Preferably, very first time determination module specifically for: by passive intermodulation signal X(n) and passive cross modulation test signal Y(n) carry out correlation processing, determine passive intermodulation signal X(n) and passive cross modulation test signal Y(n) time correlation function
wherein, m=0 ... M-1, j is convolutional calculation; According to time correlation function, obtain a plurality of relevant peaks C(K), wherein, the passive intermodulation of each relevant peaks and corresponding diverse location, according to passive cross modulation test signal Y(n) total amplitude
determine relevant peaks C(K) corresponding passive intermodulation size
wherein, K is relevant peaks C(K) corresponding counting; According to time correlation function, determine passive intermodulation signal X(n) with respect to passive cross modulation test signal Y(n) very first time function
wherein, f
sfor sampling rate.
Preferably, the second time determination module specifically for: according to transmitting chain time delay value, receiver time delay value and very first time function, obtain passive intermodulation signal at antenna-feedback system second function of time from passive intermodulation point to base station port
wherein, t is passive intermodulation signal at antenna-feedback system from passive intermodulation point to base station port two-way time, and k is passive intermodulation size scaled values, τ
1for base station dispatch from the factory before the time delay value of transmitting chain of calibration, prolong τ
2for base station dispatch from the factory before the time delay value of receiver of calibration.
Preferably, position determination module specifically for: according to second function of time and signal velocity, determine location-dependent function P (d)=v * P (the t)=v of passive intermodulation signal
f* c * P (t), wherein, v is signal velocity, v
ffor the relative propagation constant of cable, c is the light velocity; According to relevant peaks C(K) corresponding passive intermodulation size
with location-dependent function P (d)=v * P (t)=v
f* c * P (t) determines the size of passive intermodulation and the corresponding relation of present position.
Beneficial effect of the present invention is as follows:
By obtaining intensity and the position of passive intermodulation between base station equipment and antenna-feedback system, and then analysis obtains breakpoint or the position of failure point of cable, while having solved passive intermodulation input in prior art, feeder line or the bad position of equipment passive intermodulation are difficult for the problem of detection and diagnosing, can find and orientation problem at engineering phase, reduce Breakdown Maintenance and testing cost, improve payment speed, improve failure diagnosis efficiency, realize the self-diagnostic function of equipment, improve network quality and customer satisfaction.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, and for above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by the specific embodiment of the present invention.
Accompanying drawing explanation
By reading below detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing is only for the object of preferred implementation is shown, and do not think limitation of the present invention.And in whole accompanying drawing, by identical reference symbol, represent identical parts.In the accompanying drawings:
Fig. 1 is the flow chart of the passive intermodulation method for detecting position of the embodiment of the present invention;
Fig. 2 is passive intermodulation position detecting device and the external equipment connection diagram of the embodiment of the present invention;
Fig. 3 is the schematic diagram of the passive intermodulation method for detecting position equipment therefor of example of the present invention;
Fig. 4 is size and the curve chart of corresponding distance thereof of the passive intermodulation of the embodiment of the present invention;
Fig. 5 is the structural representation of the passive intermodulation position detecting device of the embodiment of the present invention.
Embodiment
Exemplary embodiment of the present disclosure is described below with reference to accompanying drawings in more detail.Although shown exemplary embodiment of the present disclosure in accompanying drawing, yet should be appreciated that and can realize the disclosure and the embodiment that should do not set forth limits here with various forms.On the contrary, it is in order more thoroughly to understand the disclosure that these embodiment are provided, and can by the scope of the present disclosure complete convey to those skilled in the art.
Feeder line or the bad position of equipment passive intermodulation are difficult for when solving passive intermodulation input in prior art the problem of detection and diagnosing, the invention provides a kind of passive intermodulation method for detecting position and device, without testing staff, carry instrument location fault, the technical scheme of the embodiment of the present invention gets final product base stations detected emission system to the abort situation of antenna feeder cable, greatly reduce costs, improve failure diagnosis efficiency, realize the self-diagnostic function of equipment, below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, does not limit the present invention.
Embodiment of the method
According to embodiments of the invention, a kind of passive intermodulation method for detecting position is provided, Fig. 1 is the flow chart of the passive intermodulation method for detecting position of the embodiment of the present invention, as shown in Figure 1, the passive intermodulation method for detecting position of the embodiment of the present invention, comprises following processing:
Step 101, transmitting passive cross modulation test signal, and gather passive intermodulation signal;
Before execution step 101, need signalization tranmitting frequency and frequency reception signal.
In step 101, signalization tranmitting frequency and frequency reception signal specifically comprise:
1, according to the transmitting start-stop frequency of base station, determine that the M rank intermodulation start-stop frequency of base station and the receive frequency of base station exist common factor, wherein, M is positive integer;
2, the transmitting start-stop frequency that signalization tranmitting frequency is base station;
3, signalization receive frequency is the frequency of M rank inter-modulated signal, and wherein, the frequency of M rank inter-modulated signal falls into the receive frequency range of base station.
Step 102, according to the time relationship of passive intermodulation signal and passive cross modulation test signal, determines the size of passive intermodulation and the corresponding relation of present position.
Step 102 comprises following processing:
Step 1021, determines that passive intermodulation signal is with respect to the very first time function of passive cross modulation test signal, and the size of definite passive intermodulation;
Particularly, the passive intermodulation signal collecting and the signal of launching are carried out to correlation processing, obtain passive intermodulation signal with respect to the very first time function of passive cross modulation test signal;
Specifically be handled as follows:
1, by passive intermodulation signal X(n) and passive cross modulation test signal Y(n) carry out correlation processing, determine passive intermodulation signal X(n) and passive cross modulation test signal Y(n) time correlation function
wherein, m=0 ... M-1, j is that convolution is determined;
2, according to time correlation function, obtain a plurality of relevant peaks C(K), wherein, the passive intermodulation of each relevant peaks and corresponding diverse location, according to passive cross modulation test signal Y(n) total amplitude
determine relevant peaks C(K) corresponding passive intermodulation size
wherein, K is relevant peaks C(K) corresponding counting;
3, according to time correlation function, determine passive intermodulation signal X(n) with respect to passive cross modulation test signal Y(n) very first time function
wherein, f
sfor sampling rate.
Step 1022, according to transmitting chain time delay value, receiver time delay value and very first time function, determine passive intermodulation signal at antenna-feedback system second function of time from passive intermodulation point to base station port;
Particularly, by the time delay of compensate for emission link and receiver, obtain passive intermodulation signal at antenna-feedback system second function of time from passive intermodulation point to base station port.
Step 1022 specifically comprises following processing: according to transmitting chain time delay value, receiver time delay value and very first time function, obtain passive intermodulation signal at antenna-feedback system second function of time from passive intermodulation point to base station port
wherein, t is passive intermodulation signal at antenna-feedback system from passive intermodulation point to base station port two-way time, and k is passive intermodulation size scaled values, τ
1for base station dispatch from the factory before calibration transmitting chain time delay value, prolong τ
2for base station dispatch from the factory before calibration receiver time delay value.
Step 1023, according to second function of time and signal velocity, determines the location-dependent function of passive intermodulation signal, and determines the size of passive intermodulation and the corresponding relation of present position according to the size of location-dependent function and passive intermodulation.
Particularly, according to second function of time of passive intermodulation signal and the relation of signal velocity, obtain the location-dependent function of passive intermodulation signal.
Step 1023 specifically comprises following processing:
1,, according to second function of time and signal velocity, determine location-dependent function P (d)=v * P (the t)=v of passive intermodulation signal
f* c * P (t), wherein, v is signal velocity, v
ffor the relative propagation constant of cable, c is the light velocity;
2, according to relevant peaks C(K) corresponding passive intermodulation size
with location-dependent function P (d)=v * P (t)=v
f* c * P (t), determines the size of passive intermodulation and the corresponding relation of present position.
Take the base station of 850M frequency range is below example, and the said method of the embodiment of the present invention is done at length to set forth.
Fig. 2 is passive intermodulation position detecting device and the external equipment connection diagram of the embodiment of the present invention.In figure, provided the scene of the actual use of base station system, in outfield, it has been very common application mode that a plurality of base stations share antenna-feedback system, so in embodiments of the present invention, not only considered that single transmitting-receiving port is independently used the scene of antenna-feedback system, also considered that a plurality of transmitting-receiving ports share the scene of antenna feeder.
For a plurality of transmitting-receiving ports, share the scene of antenna feeder, not only will consider the passive intermodulation that the port produces, also will calculate the multistage intermodulation that any 2 ports produce.
Fig. 3 is the schematic diagram of the passive intermodulation method for detecting position equipment therefor of example of the present invention.Fig. 3 is a kind of preferred structure, and in figure, control unit is realized mutual between backstage and base station system, and mutual between computer and base station system.Data transmission, receiving element, launches by the logical block of base station system the test signal needing, and gathers passive intermodulation signal, and calculate size.Signal processing unit, is completed by the dsp chip of base station system, can settling signal ask related operation, passive intermodulation position calculation.
Below the detailed handling process of the passive intermodulation method for detecting position of example of the present invention is elaborated, specifically comprises following processing:
Step 1, transmitting start-stop frequency information [F1, F2] according to base station, calculates its M rank intermodulation information, for example, 3 rank intermodulation, [2*F1-F2,2F2-F1], 5 rank intermodulation [3*F1-2F2,3*F2-2*F1] and more multistage intermodulation, whether there is common factor with receive frequency, according to result of calculation, the exponent number that selection will be calculated.In this example, take the base station of 850M frequency range is example, and the start-stop frequency of 850M base station transmitting is 869MHz and 894MHz, and the start-stop frequency of reception is 824MHz and 849MHz, we calculate its 3 rank intermodulation start-stop frequency is 844MHz and 919MHz, and visible 3 rank intermodulation meetings drop into receive frequency range;
Step 2, it is 869M and 894M that emission signal frequency is set, power is respectively 43dBm;
Step 3, the frequency that reception signal is set is the frequency of M rank inter-modulated signal.In this example, the frequency 844MHz that the frequency of receiving element is its 3 rank inter-modulated signal is set;
Step 4, carries out the collection that transmits and receives signal of test signal successively;
Step 5, the passive intermodulation signal X(n that passive intermodulation processing unit receives collection) and the test signal Y(n of transmitting) relevant treatment, can obtain the time correlation function of these two signals,
By correlation function, can obtain a plurality of relevant peaks C(K), the passive intermodulation of each relevant peaks and corresponding diverse location.Suppose
relevant peaks C(K) corresponding passive intermodulation size is
relevant peaks C(K) correspondence counts as K;
Step 6, supposes that sampling rate is f
sthereby, can obtain passive intermodulation signal with respect to the function of time transmitting
Step 7, the time delay value τ 1 of transmitting chain has been calibrated respectively in base station before dispatching from the factory, the time delay τ 2 of receiver, thus can access the function of time that antenna-feedback system passive intermodulation is put base station port
K is passive intermodulation size scaled values;
Step 8, speed and the time of according to signal, propagating can obtain the distance of its propagation, P (d)=v * P (t)=v
f* c * P (t), the relative propagation constant that wherein vf is cable, c is the light velocity, Fig. 4 is size and the curve chart of corresponding distance thereof of the passive intermodulation of the embodiment of the present invention, as shown in Figure 4, can calculate size and the corresponding distance thereof of passive intermodulation.
In sum, technical scheme by means of the embodiment of the present invention, by obtaining intensity and the position of passive intermodulation between base station equipment and antenna-feedback system, and then analysis obtains breakpoint or the position of failure point of cable, while having solved passive intermodulation input in prior art, feeder line or the bad position of equipment passive intermodulation are difficult for the problem of detection and diagnosing, can find and orientation problem at engineering phase, reduce Breakdown Maintenance and testing cost, improve payment speed, improve failure diagnosis efficiency, realize the self-diagnostic function of equipment, improve network quality and customer satisfaction.
Device embodiment
According to embodiments of the invention, a kind of passive intermodulation position detecting device is provided, Fig. 5 is the structural representation of the passive intermodulation position detecting device of the embodiment of the present invention, as shown in Figure 5, according to the passive intermodulation position detecting device of the embodiment of the present invention, comprise: transmitting acquisition module 50 and processing module 52, below be described in detail the modules of the embodiment of the present invention.
Transmitting acquisition module 50, for launching passive cross modulation test signal, and gathers passive intermodulation signal;
Processing module 52, for according to the time relationship of passive intermodulation signal and passive cross modulation test signal, determines the size of passive intermodulation and the corresponding relation of present position.
Preferably, in embodiments of the present invention, can also comprise: module is set, for before transmitting acquisition module 50 transmitting passive cross modulation test signals, signalization tranmitting frequency and frequency reception signal;
Arrange module specifically for: according to the transmitting start-stop frequency of base station, determining that the M rank intermodulation start-stop frequency of base station and the receive frequency of base station exist occurs simultaneously, and wherein, M is positive integer; Signalization tranmitting frequency is the transmitting start-stop frequency of base station; Signalization receive frequency is the frequency of M rank inter-modulated signal, and wherein, the frequency of M rank inter-modulated signal falls into the receive frequency range of base station.
Above-mentioned processing module 52 specifically comprises:
Very first time determination module, for determining that passive intermodulation signal is with respect to the very first time function of passive cross modulation test signal, and the size of definite passive intermodulation;
Very first time determination module specifically for:
By passive intermodulation signal X(n) and passive cross modulation test signal Y(n) carry out correlation processing, determine passive intermodulation signal X(n) and passive cross modulation test signal Y(n) time correlation function
Wherein, m=0 ... M-1,, j is that convolution is determined;
According to time correlation function, obtain a plurality of relevant peaks C(K), wherein, the passive intermodulation of each relevant peaks and corresponding diverse location, according to passive cross modulation test signal Y(n) total amplitude
determine relevant peaks C(K) corresponding passive intermodulation size
wherein, K is relevant peaks C(K) corresponding counting;
According to time correlation function, determine passive intermodulation signal X(n) with respect to passive cross modulation test signal Y(n) very first time function
wherein, f
sfor sampling rate.
The second time determination module, for according to transmitting chain time delay value, receiver time delay value and very first time function, determine passive intermodulation signal at antenna-feedback system second function of time from passive intermodulation point to base station port;
The second time determination module specifically for:
According to transmitting chain time delay value, receiver time delay value and very first time function, determine passive intermodulation signal at antenna-feedback system second function of time from passive intermodulation point to base station port
wherein, t is passive intermodulation signal at antenna-feedback system from passive intermodulation point to base station port two-way time, and k is passive intermodulation size scaled values, τ
1for base station dispatch from the factory before the time delay value of transmitting chain of calibration, prolong τ
2for base station dispatch from the factory before the time delay value of receiver of calibration.
Position determination module, for according to second function of time and signal velocity, determines the location-dependent function of passive intermodulation signal, and determines the size of passive intermodulation and the corresponding relation of present position according to the size of location-dependent function and passive intermodulation.
Position determination module specifically for:
According to second function of time and signal velocity, determine location-dependent function P (d)=v * P (the t)=v of passive intermodulation signal
f* c * P (t), wherein, v is signal velocity, v
ffor the relative propagation constant of cable, c is the light velocity;
According to relevant peaks C(K) corresponding passive intermodulation size
with location-dependent function P (d)=v * P (t)=v
f* c * P (t) determines the size of passive intermodulation and the corresponding relation of present position.
Fig. 2 is passive intermodulation position detecting device and the external equipment connection diagram of the embodiment of the present invention.In figure, provided the scene of the actual use of base station system, in outfield, it has been very common application mode that a plurality of base stations share antenna-feedback system, so in embodiments of the present invention, not only considered that single transmitting-receiving port is independently used the scene of antenna-feedback system, also considered that a plurality of transmitting-receiving ports share the scene of antenna feeder.
For a plurality of transmitting-receiving ports, share the scene of antenna feeder, not only will consider the passive intermodulation that the port produces, also will determine the multistage intermodulation that any 2 ports produce.
It should be noted that, arranging module, transmitting acquisition module 50, very first time computing module, the second Time Calculation module and position computation module except above-mentioned of the embodiment of the present invention, can also structure as shown in Figure 3 divide, in Fig. 3, control unit is realized mutual between backstage and base station system, and mutual between computer and base station system.Data transmission, receiving element, launches by the logical block of base station system the test signal needing, and gathers passive intermodulation signal, and calculate size.Signal processing unit, is completed by the dsp chip of base station system, can settling signal ask related operation, passive intermodulation position calculation.
To sum up, technical scheme by means of the embodiment of the present invention, by obtaining intensity and the position of passive intermodulation between base station equipment and antenna-feedback system, and then analysis obtains breakpoint or the position of failure point of cable, while having solved passive intermodulation input in prior art, feeder line or the bad position of equipment passive intermodulation are difficult for the problem of detection and diagnosing, can find and orientation problem at engineering phase, reduce Breakdown Maintenance and testing cost, improve payment speed, improve failure diagnosis efficiency, realize the self-diagnostic function of equipment, improve network quality and customer satisfaction.
The algorithm providing at this is intrinsic not relevant to any certain computer, virtual system or miscellaneous equipment with demonstration.Various general-purpose systems also can with based on using together with this teaching.According to description above, it is apparent constructing the desired structure of this type systematic.In addition, the present invention is not also for any certain programmed language.It should be understood that and can utilize various programming languages to realize content of the present invention described here, and the description of above language-specific being done is in order to disclose preferred forms of the present invention.
In the specification that provided herein, a large amount of details have been described.Yet, can understand, embodiments of the invention can not put into practice in the situation that there is no these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Similarly, be to be understood that, in order to simplify the disclosure and to help to understand one or more in each inventive aspect, in the above in the description of exemplary embodiment of the present invention, each feature of the present invention is grouped together into single embodiment, figure or sometimes in its description.Yet, the method for the disclosure should be construed to the following intention of reflection: the present invention for required protection requires than the more feature of feature of clearly recording in each claim.Or rather, as reflected in claims below, inventive aspect is to be less than all features of disclosed single embodiment above.Therefore, claims of following embodiment are incorporated to this embodiment thus clearly, and wherein each claim itself is as independent embodiment of the present invention.
Those skilled in the art are appreciated that and can the module in the equipment in embodiment are adaptively changed and they are arranged in one or more equipment different from this embodiment.Module in embodiment or unit or assembly can be combined into a module or unit or assembly, and can put them into a plurality of submodules or subelement or sub-component in addition.At least some in such feature and/or process or unit are mutually repelling, and can adopt any combination to combine all processes or the unit of disclosed all features in this specification (comprising claim, summary and the accompanying drawing followed) and disclosed any method like this or equipment.Unless clearly statement in addition, in this specification (comprising claim, summary and the accompanying drawing followed) disclosed each feature can be by providing identical, be equal to or the alternative features of similar object replaces.
In addition, those skilled in the art can understand, although embodiment more described herein comprise some feature rather than further feature included in other embodiment, the combination of the feature of different embodiment means within scope of the present invention and forms different embodiment.For example, in the following claims, the one of any of embodiment required for protection can be used with compound mode arbitrarily.
All parts embodiment of the present invention can realize with hardware, or realizes with the software module moved on one or more processor, or realizes with their combination.It will be understood by those of skill in the art that and can use in practice microprocessor or digital signal processor (DSP) to realize according to the some or all functions of the some or all parts in the passive intermodulation position detecting device of the embodiment of the present invention.The present invention for example can also be embodied as, for carrying out part or all equipment or device program (, computer program and computer program) of method as described herein.Realizing program of the present invention and can be stored on computer-readable medium like this, or can there is the form of one or more signal.Such signal can be downloaded and obtain from internet website, or provides on carrier signal, or provides with any other form.
It should be noted above-described embodiment the present invention will be described rather than limit the invention, and those skilled in the art can design alternative embodiment in the situation that do not depart from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and is not listed as element or step in the claims.Being positioned at word " " before element or " one " does not get rid of and has a plurality of such elements.The present invention can be by means of including the hardware of some different elements and realizing by means of the computer of suitably programming.In having enumerated the unit claim of some devices, several in these devices can be to carry out imbody by same hardware branch.The use of word first, second and C grade does not represent any order.Can be title by these word explanations.
Claims (14)
1. a passive intermodulation method for detecting position, is characterized in that, comprising:
Transmitting passive cross modulation test signal, and gather passive intermodulation signal;
According to the time relationship of described passive intermodulation signal and described passive cross modulation test signal, determine the size of passive intermodulation and the corresponding relation of present position.
2. the method for claim 1, is characterized in that, before transmitting passive cross modulation test signal, described method also comprises:
Signalization tranmitting frequency and frequency reception signal.
3. method as claimed in claim 2, is characterized in that, according to the time relationship of described passive intermodulation signal and described passive cross modulation test signal, determines that the size of passive intermodulation and the corresponding relation of present position specifically comprise:
Determine that described passive intermodulation signal is with respect to the very first time function of described passive cross modulation test signal, and the size of definite passive intermodulation;
According to transmitting chain time delay value, receiver time delay value and described very first time function, determine described passive intermodulation signal at antenna-feedback system second function of time from passive intermodulation point to base station port;
According to described second function of time and signal velocity, determine the location-dependent function of passive intermodulation signal, and determine the size of passive intermodulation and the corresponding relation of present position according to the size of described location-dependent function and described passive intermodulation.
4. method as claimed in claim 3, is characterized in that, signalization tranmitting frequency and frequency reception signal specifically comprise:
According to the transmitting start-stop frequency of base station, determine that the M rank intermodulation start-stop frequency of base station and the receive frequency of base station exist common factor, wherein, M is positive integer;
Signalization tranmitting frequency is the transmitting start-stop frequency of described base station;
Signalization receive frequency is the frequency of M rank inter-modulated signal, and wherein, the frequency of described M rank inter-modulated signal falls into the receive frequency range of described base station.
5. method as claimed in claim 4, is characterized in that, determine that described passive intermodulation signal is with respect to the very first time function of described passive cross modulation test signal, and the size of definite passive intermodulation specifically comprises:
By described passive intermodulation signal X(n) and described passive cross modulation test signal Y(n) carry out correlation processing, determine described passive intermodulation signal X(n) and described passive cross modulation test signal Y(n) time correlation function
wherein, m=0 ... M-1, j is convolutional calculation;
According to described time correlation function, obtain a plurality of relevant peaks C(K), wherein, the passive intermodulation of each relevant peaks and corresponding diverse location, according to described passive cross modulation test signal Y(n) total amplitude
determine relevant peaks C(K) corresponding passive intermodulation size
wherein, K is relevant peaks C(K) corresponding counting;
According to described time correlation function, determine described passive intermodulation signal X(n) with respect to described passive cross modulation test signal Y(n) described very first time function
wherein, f
sfor sampling rate.
6. method as claimed in claim 5, it is characterized in that, according to transmitting chain time delay value, receiver time delay value and described very first time function, determine that second function of time from passive intermodulation point to base station port specifically comprises described passive intermodulation signal at antenna-feedback system:
According to transmitting chain time delay value, receiver time delay value and described very first time function, obtain described passive intermodulation signal at antenna-feedback system described second function of time from passive intermodulation point to base station port
wherein, t is described passive intermodulation signal at antenna-feedback system from passive intermodulation point to base station port two-way time, and k is passive intermodulation size scaled values, τ
1for base station dispatch from the factory before the time delay value of transmitting chain of calibration, prolong τ
2for base station dispatch from the factory before the time delay value of receiver of calibration.
7. method as claimed in claim 6, it is characterized in that, according to described second function of time and signal velocity, determine the location-dependent function of passive intermodulation signal, and determine that according to the size of described location-dependent function and described passive intermodulation the size of passive intermodulation and the corresponding relation of present position specifically comprise:
According to described second function of time and signal velocity, determine location-dependent function P (d)=v * P (the t)=v of passive intermodulation signal
f* c * P (t), wherein, v is signal velocity, v
ffor the relative propagation constant of cable, c is the light velocity;
According to described relevant peaks C(K) corresponding passive intermodulation size
with described location-dependent function P (d)=v * P (t)=v
f* c * P (t) determines the size of passive intermodulation and the corresponding relation of present position.
8. a passive intermodulation position detecting device, is characterized in that,
Transmitting acquisition module, for launching passive cross modulation test signal, and gathers passive intermodulation signal;
Processing module, for according to the time relationship of described passive intermodulation signal and described passive cross modulation test signal, determines the size of passive intermodulation and the corresponding relation of present position.
9. device as claimed in claim 8, is characterized in that, described device also comprises:
Module is set, for signalization tranmitting frequency and frequency reception signal.
10. device as claimed in claim 9, is characterized in that, described processing module specifically comprises:
Very first time determination module, for determining that described passive intermodulation signal is with respect to the very first time function of described passive cross modulation test signal, and calculates the size of passive intermodulation;
The second time determination module, for according to transmitting chain time delay value, receiver time delay value and described very first time function, determine described passive intermodulation signal at antenna-feedback system second function of time from passive intermodulation point to base station port;
Position determination module, be used for according to described second function of time and signal velocity, determine the location-dependent function of passive intermodulation signal, and determine the size of passive intermodulation and the corresponding relation of present position according to the size of described location-dependent function and described passive intermodulation.
11. devices as claimed in claim 10, is characterized in that, described arrange module specifically for:
According to the transmitting start-stop frequency of base station, determine that the M rank intermodulation start-stop frequency of base station and the receive frequency of base station exist common factor, wherein, M is positive integer; Signalization tranmitting frequency is the transmitting start-stop frequency of described base station; Signalization receive frequency is the frequency of M rank inter-modulated signal, and wherein, the frequency of described M rank inter-modulated signal falls into the receive frequency range of described base station.
12. devices as claimed in claim 11, is characterized in that, described very first time determination module specifically for:
By described passive intermodulation signal X(n) and described passive cross modulation test signal Y(n) carry out correlation processing, determine described passive intermodulation signal X(n) and described passive cross modulation test signal Y(n) time correlation function
wherein, m=0 ... M-1, j is convolutional calculation;
According to described time correlation function, obtain a plurality of relevant peaks C(K), wherein, the passive intermodulation of each relevant peaks and corresponding diverse location, according to described passive cross modulation test signal Y(n) total amplitude
determine relevant peaks C(K) corresponding passive intermodulation size
wherein, K is relevant peaks C(K) corresponding counting;
According to described time correlation function, determine described passive intermodulation signal X(n) with respect to described passive cross modulation test signal Y(n) described very first time function
wherein, f
sfor sampling rate.
13. devices as claimed in claim 12, is characterized in that, described the second time determination module specifically for:
According to transmitting chain time delay value, receiver time delay value and described very first time function, obtain described passive intermodulation signal at antenna-feedback system described second function of time from passive intermodulation point to base station port
wherein, t is described passive intermodulation signal at antenna-feedback system from passive intermodulation point to base station port two-way time, and k is passive intermodulation size scaled values, τ
1for base station dispatch from the factory before the time delay value of transmitting chain of calibration, prolong τ
2for base station dispatch from the factory before the time delay value of receiver of calibration.
14. devices as claimed in claim 13, is characterized in that, described position determination module specifically for:
According to described second function of time and signal velocity, determine location-dependent function P (d)=v * P (the t)=v of passive intermodulation signal
f* c * P (t), wherein, v is signal velocity, v
ffor the relative propagation constant of cable, c is the light velocity;
According to described relevant peaks C(K) corresponding passive intermodulation size
with described location-dependent function P (d)=v * P (t)=v
f* c * P (t) determines the size of passive intermodulation and the corresponding relation of present position.
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| CN201310120696.7A CN104104455B (en) | 2013-04-09 | 2013-04-09 | Passive intermodulation method for detecting position and device |
| PCT/CN2013/085901 WO2014166229A1 (en) | 2013-04-09 | 2013-10-24 | Passive intermodulation position detection method and device |
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| US10187098B1 (en) | 2017-06-30 | 2019-01-22 | At&T Intellectual Property I, L.P. | Facilitation of passive intermodulation cancelation via machine learning |
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| CN104104455B (en) | 2019-06-14 |
| WO2014166229A1 (en) | 2014-10-16 |
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