KR20110071722A - Passive intermodulation distortion generating position estimation device and method - Google Patents

Abstract

Disclosed are a passive intermodulation distortion generating position estimation apparatus and method thereof.

After inputting reference signals of different frequency bands to a passive element to be measured, a received signal output from the passive element is received. The generated position of the passive intermodulation distortion generated in the passive element is estimated based on the correlation between the received signal and the reference signal. The dimensions and positions of the components of the passive components are determined through the design drawings of the passive components stored in advance, and the information generated from the passive components using the information and the magnitude and delay information of the passive intermodulation distortion estimated above. Estimate the location of passive intermodulation distortion.

Description

Passive intermodulation distortion generating position estimation device and its method {APPARATUS FOR ESTIMATING PASSIVE INTERMODULATION DISTORTION GENERATION POSITION AND METHOD THEREOF}

The present invention relates to a device for measuring passive intermodulation distortion, and more particularly, a device for estimating a position at which a manual intermodulation distortion occurs in a corresponding communication device by measuring a manual intermodulation distortion generated in a communication device including a passive element. It's about how.

As the number of mobile communication subscribers increases, services for subscribers are diversified. As one of these services, a mobile communication service provider configures a mobile communication network so that a plurality of mobile communication methods overlap and provides a service according to each mobile communication method.

As such, when a plurality of mobile communication schemes are configured to overlap, as two systems having different frequencies share a feeder line or the like, as a nonlinear feature of a passive element in which the shared or two shared frequencies exist thereafter. As a result, inter-modulation distortion occurs.

These intermodulation distortions cause two or more signal frequencies to interfere with each other, causing unwanted parasitic signals. Passive InterModulation Distortion ("PIMD") when such a phenomenon occurs in passive devices. It is called.

FIG. 1 is a diagram illustrating an example in which PIMD occurs in a system using two different frequency bands shared by a feeder.

Referring to FIG. 1, the system 1 transmits a signal in the A frequency band and a signal in the B frequency band, and receives a signal in the C frequency band. For example, the A frequency band is a transmission frequency band in a WCDMA system, approximately 2.1 GHz band, the B frequency band is a transmission frequency band in a WiBro system, approximately 2.3 GHz band, and the C frequency band is a WCDMA system. The reception frequency band, which may be approximately 1.9 GHz band. Hereinafter, for convenience of description, a signal in the A frequency band is called an A signal, a signal in the B frequency band is called a B signal, and a signal in the C frequency band is called a C signal.

The A and B signals are each amplified by a predetermined level of power through the amplifiers 10 and 20, and the noise of each transmission frequency band is removed through the filters 30 and 40, and then coupled to each other in the combiner 50. .

This mutually coupled signal is transmitted to the antenna 70 by the duplexer 60, and then transmitted to the outside through the antenna 70.

On the other hand, the signal received from the outside through the antenna 70 is transmitted to the filter 80 by the duplexer 60, and after the noise of the reception frequency band is removed from the filter 80, by the amplifier 90 The power is amplified a predetermined level and received as a C signal.

As such, when a system using two different frequency bands combines transmission signals of two different frequency bands and transmits them through a passive element such as a divider or an antenna, a PIMD is generated by the passive element and is mainly a passive element. Occurs at the contact of.

The PIMD does not matter when it occurs outside the service band, but when it occurs in the service band, noise affects the quality of the corresponding service.

In particular, in the case of a communication device such as a base station or a repeater, after the network for the service is constructed, additional frequencies are allocated due to the enhancement of the network or the lack of frequency to provide a service using the same system or a service using another system. At this time, the existing facilities are shared to reduce the investment cost, and the PIMD problem is considered. In particular, in the case of the in-building service, for efficient service, the output signal of the high-power equipment is diverged several times to serve hallways or offices of each floor. In such inbuilding, the influence of PIMD characteristics is very important because of the complicated structure and many contacts.

Therefore, by removing PIMD generated when the different systems are used in common, the system cost should be stabilized as well as the facility cost during the shared use.

In particular, when quality degradation occurs due to aging of the communication device, PIMD generation due to aging passive elements should be eliminated.

However, conventionally, only methods for measuring PIMD generated when different systems are used or simply removing the generated PIMD are provided.

Therefore, there is a demand for a method for providing a preliminary check for quality deterioration due to aging by informing a position of a passive element generating a PIMD.

It is an object of the present invention to provide an apparatus and method for knowing the generation position of a PIMD generated in a passive element.

A passive intermodulation distortion generation position estimation device according to one feature of the present invention for achieving the technical problem,

A signal generator for generating reference signals of different frequency bands; A combiner for coupling the reference signal generated by the signal generator; A duplexer for applying a reference signal coupled from the combiner to the passive element; And estimating the magnitude and delay of the passive intermodulation distortion generated in the passive element using the received signal received from the passive element through the duplexer and the reference signal generated by the reference signal generator, And a controller for estimating a generation position of the passive intermodulation distortion in the passive element based on the magnitude and the delay of the intermodulation distortion.

In accordance with another aspect of the present invention, a method for estimating a position for generating a manual intermodulation distortion,

Generating reference signals of different frequency bands and applying them to the passive element; Estimating the magnitude and delay of the passive intermodulation distortion occurring in the passive element by calculating a correlation between the received signal received from the passive element and the reference signal; Estimating a generation position of the passive intermodulation distortion generated in the passive element by using the estimated magnitude and delay of the passive intermodulation distortion and the configuration of the passive element.

According to the present invention, the generation position of the PIMD generated in the passive element can be known.

In addition, even in the case of complex installation, only the location to be checked is notified, so it is possible to check in advance about the deterioration of quality due to the aging of passive devices.

In addition, it is possible to efficiently cope with the deterioration of quality due to the aging of the passive element.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

Now, a PIMD generation position estimation apparatus and method thereof according to an embodiment of the present invention will be described in detail.

2 is a block diagram of a PIMD generation position estimation apparatus 10 according to an embodiment of the present invention.

As shown in FIG. 2, the PIMD generation position estimation apparatus 10 according to an exemplary embodiment of the present invention may include a reference signal generator 100, a combiner 200, a duplexer 300, a controller 400, and a user interface. 500.

The reference signal generator 100 generates signals of frequency bands of two systems shared by the passive device 600, for example, signals of A band and B band as reference signals.

The combiner 200 combines the reference signal generated by the reference signal generator 100, that is, the A band signal and the B band signal.

The duplexer 300 provides the reference signal coupled from the combiner 200 to the passive element 600. That is, the signal of the frequency band for the common use of the two systems provided by the PIMD generation position estimation apparatus 10 according to the embodiment of the present invention to the passive element 600 is provided to the passive element 600 through the duplexer 300. Will be. Here, the passive element 600 refers to a communication facility including a splitter for transmitting a signal or an antenna for transmitting a signal between two systems using different frequency bands, such as an in-building system.

The duplexer 300 receives a received signal output from the passive element 600 by the reference signal input and outputs the received signal to the controller 400.

The control unit 400 receives the reference signals generated by the reference signal generator 100, that is, the A-band signal and the B-band signal, receives the received signal output from the duplexer 300, and then, between the reference signal and the received signal. Calculates the correlation and the PIMD size and delay value, and calculates the position where the PIMD is generated in the passive element 600 based on the configuration of the passive element 600, that is, the design drawing information and the size and position of the element. Estimate.

The user interface 500 provides a user with an interface that enables the user to control the PIMD generation position estimating apparatus 10 according to an embodiment of the present invention. For example, according to the control of the user through the user interface 500, the controller 400 may adjust the frequency band of the reference signal generated by the reference signal generator 100. The user interface 500 includes a keyboard, a monitor, and the like.

3 is a detailed block diagram of the controller 400 illustrated in FIG. 2.

As shown in FIG. 3, the controller 400 includes a PIMD measuring unit 410, an equipment configuration managing unit 420, and a location estimating unit 430.

The PIMD measuring unit 410 calculates a correlation between the reference signal generated by the reference signal generator 100 and the received signal received by the duplexer 300 to generate the magnitude and delay value of the PIMD generated by the passive element 600. Is estimated and output to the position estimating unit 430.

The equipment configuration manager 420 stores and manages the configuration of the passive element 600 input from the user through the user interface 500, that is, design drawing information, the specifications and positions of the elements constituting the passive element 600, and the like. .

The position estimator 430 receives a PIMD size and a delay value measured by the PIMD measuring unit 410, and receives a design drawing and a specification and position information of the component elements managed by the equipment configuration manager 420. The PIMD generation position generated within 600 is estimated and displayed through the user interface 500.

4 is a detailed block diagram of the PIMD measuring unit 410 illustrated in FIG. 3.

As shown in FIG. 4, the PIMD measuring unit 410 includes a reference signal detector 411, a filter 412, a correlation calculator 413, and a PIMD magnitude / delay estimator 413.

The reference signal detector 411 detects reference signals generated by the reference signal generator 100, that is, A band signals and B band signals.

The filter 412 filters and outputs a service band of the received signal, for example, a C band signal, from the received signal received by the duplexer 300.

The correlation calculator 413 calculates a correlation between the A band signal and the B band signal detected by the reference signal detector 411 and the C band signal output from the filter 412.

The PIMD size / delay estimator 414 estimates the magnitude and delay value of the PIMD generated by the passive element 600 based on the correlation calculated by the correlation calculator 413 and outputs it to the position estimator 430. do.

5 is a detailed block diagram of the equipment configuration management unit 420 shown in FIG.

As shown in FIG. 5, the equipment configuration management unit 420 includes a design drawing information storage unit 421 and an element specification and location determiner 422.

The design drawing information storage unit 421 stores and manages a design drawing of the passive element 600 input through the user interface 500.

The device standard and location determiner 422 may determine the location and location of the size and location of the components constituting the passive device 600 using the design drawings of the passive device 600 stored in the design drawing information storage unit 421. Output to the estimator 430.

FIG. 6 is a detailed block diagram of the position estimator 430 shown in FIG. 3.

As shown in FIG. 6, the position estimating unit 430 includes a graph constructing unit 431, a generation position estimating unit 432, and a frequency changing unit 433.

The graph configuration unit 431 constructs a graph with a correlation degree based on the correlation calculated by the PIMD measurement unit 410, the magnitude and the delay value of the measured PIMD, and displays the graph through the user interface 500.

The generation position estimator 432 uses the PIMD size and delay value measured by the PIMD measuring unit 410 and the design drawing of the passive element 600 provided by the equipment configuration manager 420 and the specification and position of the component. The occurrence position of the PIMD in the passive element 600 is estimated, and the estimated position of the PIMD is displayed on the design drawing and displayed on the user interface 500. At this time, the generation position estimator 432 displays the generation position of the PIMD with reference to the priority set for the position of passive elements on the design drawing when there is a delay value of the same PIMD, that is, a delay time. Here, the PIMD in the passive element 600 using the delay time of the PIMD included in the received signal induced through the passive element 600 in a state in which the dimensions and positions of the components of the passive element 600 are known. Estimation of the position to be generated is well known to those skilled in the art, and thus detailed description thereof is omitted here.

The frequency changing unit 433 is a frequency band of the reference signal generated by the reference signal generator 100 and a frequency filtered by the filter 412 of the PIMD measuring unit 410 according to a user's setting through the user interface 500. Change the band. That is, the frequency change unit 433 allows the user to change the frequency bands of the reference signal and the received signal, that is, the A frequency band, the B frequency band, and the C frequency band according to the frequency bands of the systems shared by the passive element 600. have.

Hereinafter, a method of estimating a generation position of a PIMD occurring in the passive element 600 by the PIMD generation position estimation apparatus 10 according to an exemplary embodiment of the present invention will be described with reference to FIG. 7.

First, two frequency bands commonly used in the passive element 600 by input from a user through the user interface 500 of the PIMD generation position estimation apparatus 10, namely, A band and B band, and A band and B band. It is assumed that the frequency band of the C band induced by the above is set in advance, and the design drawing information of the passive element 600 is stored in the design drawing information storage unit 421 in advance.

In addition, the reference signal output from the PIMD generation position estimation device 10 is applied to the passive element 600, so that the received signal output from the passive element 600 can be received by the PIMD generation position estimation device 10 For the sake of brevity, it is assumed that the duplexer 300 input / output terminal of the PIMD generation position estimation device 10 is connected to the feed line of the passive element 600.

The reference signal consisting of the A band signal and the B band signal, which is a frequency band set by the user, is generated by the reference signal generator 100 (S100) and then combined by the combiner 200, and then the duplexer 300 is connected. It is applied to the passive element 600 through (S110).

Thereafter, the received signal output from the passive element 600 is received by the control unit 400 through the duplexer 300 (S120). In this case, the received signal includes a PIMD in which the reference signals of the A band signal and the B band signal are applied to the passive element 600 and are induced through the passive element 600.

The controller 400 calculates a correlation between the reference signal generated at S100 and the received signal received at S120 (S130), and estimates the magnitude and delay value of the PIMD using the calculation result (S140).

Next, the device specification and position are determined from the design drawing stored in the design drawing information storage unit 421 (S150), the size and delay value of the PIMD estimated in the step S140, In particular, the PIMD generation position on the design drawing is estimated using the PIMD delay value, that is, the delay time (S160).

Thereafter, the controller 400 displays the information on the estimated PIMD generation position and the occurrence position on the design drawing through the user interface 500 (S170). In this case, the controller 400 may display the correlation between the PIMD magnitude and the delay value estimated in the step S140 and the base signal and the received signal on the user interface 500 through a graph. In FIG. 8, the PIMD generation position estimated in step S160 is displayed on the design drawing of the passive element 600, and at the same time, the PIMD size, delay value, and correlation distribution estimated in step S140 are shown. An example of a screen displayed graphically is shown.

As such, by displaying the PIMD generation position in the passive element 600 on the user interface 500, the user may be informed of a portion to be checked in advance in the passive element 600. Through such a preliminary inspection, it is possible to efficiently cope with deterioration of quality due to aging of the passive element 600.

In addition, since the PIMD generation position estimating apparatus 10 according to the embodiment of the present invention is implemented by miniaturization and can be carried, the user can easily carry it and immediately estimate the PIMD generation position in various passive elements in the field to perform efficient preliminary inspection. Can be done.

On the other hand, the above has been described only for estimating the generation position of the PIMD generated when the feeder line sharing of the two systems using different frequencies, this is only an example for explaining the technical features of the present invention, the above description When referring to the present invention, those skilled in the art are not limited to the technical scope of the present invention, and even when estimating the position of the PIMD generated when the feedline is shared by three or more systems using three or more different frequencies. It will be appreciated that the technical features of the invention described above may be applied.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

FIG. 1 is a diagram illustrating an example in which PIMD occurs in a system using two different frequency bands shared by a feeder.

2 is a block diagram of a PIMD generation position estimation apparatus according to an embodiment of the present invention.

3 is a detailed block diagram of the control unit shown in FIG. 2.

4 is a detailed block diagram of the PIMD measurement unit illustrated in FIG. 3.

FIG. 5 is a detailed block diagram of the equipment configuration manager shown in FIG. 3.

FIG. 6 is a detailed block diagram of the position estimator illustrated in FIG. 3.

7 is a flowchart of a PIMD generation position estimation method according to an embodiment of the present invention.

8 is a diagram illustrating an example of displaying an estimated PIMD generation position according to an embodiment of the present invention.

Claims (13)

In the apparatus for estimating the position of the passive intermodulation distortion generation in the passive element, A signal generator for generating reference signals of different frequency bands; A combiner for coupling the reference signal generated by the signal generator; A duplexer for applying a reference signal coupled from the combiner to the passive element; And The magnitude and delay of the passive intermodulation distortion generated in the passive element is estimated using the received signal received from the passive element through the duplexer and the reference signal generated by the reference signal generator, and the estimated manual horn is estimated. A control unit for estimating a generation position of the passive intermodulation distortion in the passive element based on the magnitude and delay of the modulation distortion Passive intermodulation distortion generation position estimation device comprising a. The method of claim 1, The control unit, A measurement unit estimating magnitude and delay of passive intermodulation distortion generated in the passive element by calculating a correlation between the reference signal and the received signal; A configuration manager configured to store and manage the configuration of the passive element input from a user; And A position for receiving the magnitude and delay value of the passive intermodulation distortion estimated by the measuring unit and the configuration of the passive element managed by the configuration manager to estimate and display a generation position of the passive intermodulation distortion generated in the passive element. Estimator Passive intermodulation distortion generation position estimation device comprising a. The method of claim 2, The measuring unit, A detector detecting a reference signal generated by the signal generator; A filter for filtering and outputting a service band of a received signal received by the duplexer; A calculator calculating a correlation between a reference signal detected by the detector and a received signal filtered by the filter; And Distortion estimator for estimating magnitude and delay of passive intermodulation distortion generated in the passive element based on the correlation calculated by the calculator Passive intermodulation distortion generation position estimation device comprising a. The method of claim 3, wherein The configuration management unit, A design drawing storage unit for storing and managing design drawings of the passive elements input from a user; A device identifying unit for identifying the standard and the position of the components constituting the passive element using the design drawings of the passive element stored in the design drawing storage unit and outputs it to the position estimating unit Passive intermodulation distortion generation position estimation device comprising a. 5. The method of claim 4, A graph constructing unit for constructing and displaying a graph of correlations, correlation magnitudes, and delays of the passive intermodulation distortions calculated by the correlations calculated by the measuring unit; A generation position estimator for estimating a generation position of the passive intermodulation distortion in the passive element by using the magnitude and delay of the passive intermodulation distortion, a design drawing of the passive element, and a specification and position of a good quality element; And A change unit for changing a frequency band of the reference signal and a filtering frequency band of the filter according to the user's setting Passive intermodulation distortion generation position estimation device comprising a. The method of claim 5, The generation position estimation unit displays the generation position of the manual intermodulation distortion by referring to the priority set for the position of the passive elements on the design drawing with respect to the delay of the same manual intermodulation distortion. Modulation position estimation device. The method according to any one of claims 2 to 6, The control unit estimates the position of the manual intermodulation distortion generation position, comprising a graphical representation of the correlation and the magnitude and delay of the manual intermodulation distortion estimated by the measurement unit as a graph. Device. In the method for estimating the position of the passive intermodulation distortion generation in the passive element, Generating reference signals of different frequency bands and applying them to the passive element; Estimating the magnitude and delay of the passive intermodulation distortion occurring in the passive element by calculating a correlation between the received signal received from the passive element and the reference signal; Estimating a generation position of the passive intermodulation distortion generated in the passive element using the estimated magnitude and delay of the passive intermodulation distortion and the configuration of the passive element. Manual intermodulation distortion generation position estimation method comprising a. The method of claim 8, Estimating the magnitude and delay of the passive intermodulation distortion, Detecting the reference signal; Filtering a service band of the received signal; Calculating a correlation between the reference signal and the filtered received signal; And Estimating magnitude and delay of passive intermodulation distortion generated in the passive element based on the calculated correlation; Manual intermodulation distortion generation position estimation method comprising a. 10. The method according to claim 8 or 9, Before the applying step, Storing a design drawing of the passive element input from a user; And Grasping the specifications and positions of the constituent elements constituting the passive element using the stored design drawings of the passive element Manual intermodulation distortion generation position estimation method further comprising. 10. The method of claim 9, And a frequency band of the reference signal and a service band of the received signal can be changed by a user. The method of claim 10, When the estimated delay of the passive intermodulation distortion is the same, the manual horn is characterized by indicating the occurrence position of the manual intermodulation distortion by referring to the priority set for the position of the passive elements on the design drawing. Method for estimating the location of modulation distortion. The method of claim 10, The method for estimating the position of the manual intermodulation distortion generation according to claim 1, wherein the correlation and the magnitude and delay of the estimated manual intermodulation distortion are plotted and displayed to the user.

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