KR101569697B1 - Apparatus and method for heterogeneous relaying on interference cancellation system - Google Patents

Abstract

The present invention relates to a heterogeneous service interference cancelation system (ICS) relay device and a method thereof. The present invention varies the filter usage frequency of an ICS repeater for heterogeneous services. The device and the method can vary and set the filter usage frequency and the occupying bandwidth of the ICS repeater for each heterogeneous service. The heterogeneous service ICS relay device includes: a base station oriented matching unit for matching a base station oriented signal to a radio frequency (RF); a subscriber oriented matching unit which matches a subscriber oriented signal to the RF; a filter unit which varies the filter information to connect the base station oriented matching unit and the subscriber oriented matching unit, removes the feedback of the subscriber oriented matching unit being the input of the base station oriented matching unit, and removes the output of the base station oriented matching unit being the input of the subscriber oriented matching unit; and a control unit controlling the filter value of the filter unit.

Description

[0001] The present invention relates to a heterogeneous relaying interference cancellation system,

The present invention relates to a heterogeneous service ICEs relay apparatus and method, and more particularly, to a method for varying a frequency of use of an ICEs repeater for a heterogeneous service. That is, the present invention relates to a heterogeneous service ICEs relay apparatus and method for setting a filter use frequency and an occupied bandwidth of an ICEs repeater by varying a heterogeneous service.

Recently, the use of mobile data has increased rapidly due to the emergence of smartphones and tablet PCs and the commercialization of LTE 4G services. Since one third of this mobile data is made outside the building, relaying of mobile data for outdoor shaded areas is necessary.

In the outdoor area, relay of mobile data can relay through optical line or RF, but in case of relay using optical line, installation cost of optical line is excessive and in case of relay through RF, RF output is fed back to input There is a limitation in use.

Therefore, an interference cancellation system repeater has been studied to overcome such a restriction.

For example, in Korean Patent Laid-Open Publication No. 10-2009-0005293, a service FA that is provided in an area is detected as an ICEs repeater, and a coefficient of a band-pass FIR filter optimized for the detected service FA is set Thereby eliminating noise components around the service FA that may occur during the operation of the ICEs, thereby simplifying installation of the wireless repeater.

However, even in this case, if the service of the provider is different, the frequency and the frequency bandwidth are different, and therefore, there is a disadvantage that each of the AIS repeaters dedicated for the service must be provided.

Korean Patent Publication No. 10-2009-0005293 (2009.01.22)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heterogeneous service ICEs relay apparatus and method for varying the filter use frequency of an ICEs repeater for heterogeneous services.

The present invention provides a heterogeneous service ICEs relay apparatus and method capable of changing a frequency and an occupied bandwidth of a filter of an ICEs repeater according to different services and changing a frequency without providing an ICEs repeater for each service, There is a purpose.

A heterogeneous service ICEs relay apparatus according to the present invention includes a base station direction matching unit for matching a base station signal with RF, a subscriber incomitator for matching a subscriber signal with RF, a base station incom- ing unit And a control unit for controlling the filter value of the filter unit to eliminate the feedback of the output of the subscriber incentive matching unit to the input of the subscriber incentive matching unit and the feedback of the output of the subscriber incentive matching unit to the input of the subscriber incentive matching unit, .

Here, the control unit includes a user registration unit for matching with the user, a storage unit for storing the filter value of the filter unit, and a signal processing unit for controlling the filter unit using the filter value of at least one of the user registration unit and the storage unit.

The filter unit includes a filter bank constituting the filter based on the filter value, an input monitoring unit monitoring the input of the filter bank, and an output monitoring unit monitoring the output of the filter bank.

Here, the filter unit includes a delay tap for delaying the Isis repeater signal passing through the filter unit, a coefficient multiplier for multiplying the output of the delay tap by the coefficient value, and a signal adder for summing the outputs of the coefficient multiplier and outputting the filter output.

In addition, the filter information includes at least one of a use frequency indicating a use frequency of a service provider, an occupied bandwidth indicating a frequency bandwidth to the use frequency, a spurious indicating a spurious characteristic with respect to the use frequency, a ripple indicating ripple characteristics with respect to the use frequency, And a group delay indicating delay characteristics.

Here, the filter value includes a complex number form.

In addition, the control unit further includes monitoring the input of the filter unit based on the reference waveform to calculate the filter value.

Here, the control unit further includes monitoring the output of the filter unit based on the reference waveform to calculate a filter value.

The control unit includes a group delay for displaying a reference waveform for setting filter information of the filter unit, a frequency setting menu which is a menu for setting the frequency of the filter unit, a bandwidth setting menu which is a menu for setting the frequency bandwidth of the filter unit, A group delay setting menu which is a menu for setting a group delay of a filter section, a coefficient value display section for displaying a filter value of the filter section, a filter value setting section for setting a filter value At least one of a group delay, a frequency setting menu, a spurious setting menu, a ripple setting menu, a group delay setting menu, a count value display section, a tab information display section, and a LUT display section, At least one of the file menus that store and load one file Also to constitute the user's screen.

The method of relaying heterogeneous service ICEs according to another embodiment of the present invention includes a filter information input step of receiving filter information from a user registration unit, a LUT confirmation step of checking whether a filter value requested in the filter information input step is stored in the storage unit A filter coefficient loading step of loading a filter value from a storage unit when it is confirmed that the filter value requested in the filter information input step is preliminarily stored in the storage unit; a step of, when the filter value requested in the filter information input step is not stored in the storage unit, And a filter coefficient setting step of setting the filter unit with the filter value outputted in the filter coefficient loading step and the filter coefficient calculating step.

Here, the filter information includes at least one of a use frequency indicating a use frequency of a service provider, an occupied bandwidth indicating a frequency bandwidth to the use frequency, a spurious indicating a spurious characteristic with respect to the use frequency, a ripple indicating ripple characteristics with respect to the use frequency, And a group delay indicating delay characteristics.

The heterogeneous service isies repeater and method according to the present invention has an advantage of varying the frequency of use of filters of the isesis repeater for heterogeneous service.

Alternatively, the heterogeneous service ICEs relay apparatus and method according to the present invention can vary the frequency and bandwidth occupied by the filter used by the ICEs repeater for different types of services, and can change the service frequency without providing an ICEs repeater for each service have.

FIG. 1 is a configuration diagram of a heterogeneous service ICEIs relay apparatus according to an embodiment of the present invention.
FIG. 2 is a block diagram showing the control unit of FIG. 1 in detail.
3 is a configuration diagram showing the filter unit of FIG. 1 in detail.
4 is a block diagram showing the filter bank of FIG. 3 in more detail.
5 is a signal characteristic showing characteristics of the filter bank of FIG.
6 is a table showing an example of a coefficient value for setting the filter bank of FIG.
FIG. 7 is a configuration diagram for monitoring the input waveform in the signal processing unit of FIG. 2 to update the coefficient value.
FIG. 8 is a configuration diagram for monitoring the output waveform in the signal processing unit of FIG. 2 to update the coefficient value; FIG.
FIG. 9 is a view showing a menu of the user registration unit of FIG. 2 as an example.
10 is a flowchart of a heterogeneous service ICEs relay method according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood that the present invention is not intended to be limited to the specific embodiments but includes all changes, equivalents, and alternatives included in the spirit and scope of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a heterogeneous service ICEs relay apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a configuration diagram of a heterogeneous service ICEIs relay apparatus according to an embodiment of the present invention, and FIGS. 2 to 9 are a configuration diagram, signal characteristics, tables, and screens for explaining FIG. 1 in detail.

Hereinafter, a heterogeneous service ICEs relay apparatus according to an embodiment of the present invention will be described with reference to FIG. 1 through FIG.

Referring to FIG. 1, a heterogeneous service ICEs relay apparatus according to an exemplary embodiment of the present invention includes a BS matching unit 100 for matching a BS base station signal with a RF signal, a subscriber matching And the output of the subscriber interfacing unit 300 is fed back to the input of the base station incoincident unit 100. The base station direction matching unit 300 is connected to the base station direction matching unit 100 and the subscriber interfacing unit 300, And a control unit 400 for controlling the filter value of the filter unit 200. The control unit 400 controls the filter value of the filter unit 200, .

The base station side matching unit 100 and the filter unit 200 are digitally matched and matched to either the baseband or the intermediate frequency. The intermediate frequency is a digital signal or the baseband is divided into in-phase and quadrature phases.

Likewise, the filter unit 200 and subscriber orientation matching unit 300 are digitally matched and matched to either baseband or intermediate frequency. The intermediate frequency is a digital signal or the baseband is divided into in-phase and quadrature-phase.

At least one of a used frequency, a bandwidth, a spurious, a ripple, and a group delay can be set under the control of the controller 400 so that the filter unit 200 can easily set the filter information of the filter unit 200 Easy to set up.

2 is a block diagram showing the control unit 400 of FIG. 1 in detail. The control unit 400 includes a user registration unit 410 for matching with a user, a storage unit 430 for storing filter values of the filter unit 200, and a user registration unit 410 and a storage unit 430 And a signal processing unit 420 for controlling the filter unit 200 as a filter value.

The signal processing unit 420 receives a filter value for controlling the filter unit 200 from the user registration unit 410 and uses the stored filter value when the filter setting value is stored in the storage unit 430, If there is no filter value, the filter value is calculated by calculation.

FIG. 3 is a block diagram showing the filter unit 200 of FIG. 1 in detail. The filter unit 200 includes a filter bank 220 that forms a filter based on the filter value, an input monitoring unit 210 that monitors inputs of the filter bank 220, And an output monitoring unit 230.

The filter bank 220 monitors the input value of the filter bank 220 by the input monitoring unit 210 and may change the filter value of the filter bank 220 according to the input.

In addition, the filter bank 220 may monitor the output value of the filter bank 220 by the output monitoring unit 230 and change the filter value of the filter bank 220 according to the output.

Here, the output monitoring unit 230 may monitor the output of the filter bank 220 and change the filter value of the filter bank 220. However, the output monitoring unit 230 may convert the output of the subscriber's direction matching unit 300 to digital, ) Can be used to change the filter value.

4 is a block diagram showing the filter bank 220 of FIG. 3 in more detail. The filter unit 200 includes a delay tap 221 for delaying the Isesi repeater signal passing through the filter unit 200, a coefficient multiplier 222 for multiplying the output of the delay tap 221 by a coefficient value, And a signal adder 223 for summing the outputs of the adder 222 and for outputting the filter output.

Here, the filter bank 220 may be a finite impulse response (FIR) filter or an infinite impulse response (IIR) filter. The coefficient values Ci0 to Ci4 and Cq0 to Cq4 may be set by control of the signal processing unit 420 do. Also, the number of taps of the filter is at least one.

First, the input of filter bank 220 is divided by positive phase (I) and quadrature phase (Q) and delayed by delay tap 221. The delayed signal is multiplied in the coefficient multiplier 222 by a coefficient value, which is a coefficient that affects the filter, and the outputs of the coefficient multiplier 222 are all summed and outputted in the signal summer 223.

At this time, filter characteristics such as frequency, ripple, spurious, bandwidth, and group delay of the filter are determined according to the filter coefficient.

5 is a signal characteristic showing characteristics of the filter bank 220 of FIG. At this time, the filter information includes a use frequency (S100) indicating a use frequency of a service provider, an occupied bandwidth (S400) indicating a frequency bandwidth with respect to the used frequency, a spurious (S300) indicating a spurious characteristic with respect to the used frequency, And a group delay S500 indicating a group delay characteristic of the used frequency.

The occupied bandwidth S 400 indicates a bandwidth including a power higher than a predetermined reference based on the used frequency S 100 and the spurious S 300 indicates a signal outside the band The degree to which the other band is not affected is expressed as a relative value based on the average power of the use frequency S100.

In addition, the ripple S200 represents the difference between the maximum value and the minimum value as a criterion that the in-band signal can be filtered without frequency-band-specific distortion, and the group delay S500 is a measure indicating the overall delay of the signal passing through the filter bank 220 And the difference between the maximum value and the minimum value of the frequency-dependent delay.

FIG. 6 is a table showing an example of a coefficient value for setting the filter bank 220 of FIG. At this time, the filter value may include a complex number form.

The delay tap 221 may use at least one of the delay taps 221 according to the implementation method, and the more the delay tap 221 is used, the more effectively the spurious characteristic, the ripple characteristic, and the like can be displayed.

FIG. 7 is a configuration diagram for monitoring the input waveform in the signal processing unit 420 of FIG. 2 to update the coefficient value. At this time, the controller 400 may further include calculating a filter value by monitoring the input of the filter unit 200 based on the reference waveform.

The method of updating the coefficient of the filter by monitoring the input is called an open loop control method and it is advantageous that the number of taps of the filter can be adjusted according to the input characteristic, but the distortion of the output can not be compensated have.

FIG. 8 is a configuration diagram for monitoring the output waveform in the signal processing unit 420 of FIG. 2 to update the coefficient value. At this time, the controller 400 may further include calculating the filter value by monitoring the output of the filter unit 200 based on the reference waveform.

The method of updating the coefficient of the filter by monitoring the output may be called a closed loop control. Since the output characteristic is the same as the reference, the distortion of the output can be compensated. However, the filter unit 200 and the control unit 400) due to the signal loop of the oscillator.

FIG. 9 is a screen showing an example of a menu of the user registration unit 410 of FIG. The control unit 400 includes a filter waveform S501 for displaying a reference waveform to set filter information of the filter unit 200, a frequency setting menu S510 for setting a frequency of the filter unit 200, A spurious setting menu S530 which is a menu for setting the spurious of the filter unit 200 and a menu for setting the frequency of the filter 200 A group delay setting menu S550 which is a menu for setting a group delay of the filter unit 200, a coefficient value display unit S560 for displaying a filter value of the filter unit 200, A group delay S500, a frequency setting menu S510, a spurious setting menu S530, a ripple setting menu S540, and a group delay S540. The LUT display unit S580 displays a value in which at least one of the filter values is stored. A setting menu S550, a count value display unit S560, a tab information display unit S570, And a file menu (S590) in which at least one of the LUT display unit (S580) and the LUT display unit (S580) is stored and loaded in the file.

10 is a flowchart of a heterogeneous service ICEs relaying method according to another embodiment of the present invention. At this time, in the heterogeneous service isis relay method, the filter value requested in the filter information input step (S610) and the filter information input step (S610) in which the filter information is inputted from the user registration unit (410) is stored in the storage unit A filter coefficient loading step (step S620) of loading a filter value from the storage unit 430 when it is confirmed that the filter value requested in the filter information input step S610 is stored in the storage unit 430 A filter coefficient calculation step S640 for calculating a filter value in the control unit 400 when the filter value requested in the filter information input step S610 is not stored in the storage unit 430, And a filter coefficient setting step S650 for setting the filter unit 200 with the filter value output in step S630 and the filter coefficient calculation step S640.

Here, the filter information includes a use frequency (S100) indicating a frequency of use of a service provider, an occupied bandwidth (S400) indicating a frequency bandwidth with respect to a used frequency, a spurious (S300) indicating a spurious characteristic with respect to a used frequency, And a group delay S500 indicating a group delay characteristic of the used frequency.

As described above, the heterogeneous service ICEs relay apparatus and method according to the present invention have the advantage of varying the filter use frequency of the ISEIS repeater for heterogeneous services, and vary the frequency and occupied bandwidth of the filter of the ISEES repeater for each heterogeneous service It is possible to change the service frequency without providing the Isesi repeater for each service.

Claims (11)

A base station direction matching unit for matching a base station direction signal with RF;
A subscriber incoincident unit for matching the subscriber's direction signal with RF;
And the base station is connected to the subscriber's directional matching unit by changing the filter information so that the output of the subscriber's directional matching unit is not fed back to the input of the base station incompatible unit and the output of the base station incompatible unit is inputted to the input A filter unit that removes feedback from the filter unit; And
And a control unit for controlling a filter value of the filter unit,
The filter information includes:
The frequency of use indicating the frequency of use of the carrier;
An occupied bandwidth representing a frequency bandwidth for the used frequency;
A spurious signal representing a spurious characteristic with respect to the used frequency;
A ripple representing a ripple characteristic with respect to the used frequency; And
A group delay indicating a group delay characteristic of the used frequency; Wherein the at least one of the at least one of the plurality of different services is a plurality of different services. The method according to claim 1,
Wherein,
A user registration unit matching the user;
A storage unit for storing the filter value of the filter unit; And
And a signal processing unit for controlling the filter unit with the filter value of at least one of the user registration unit and the storage unit. The method according to claim 1,
The filter unit includes:
A filter bank constituting a filter based on the filter value;
An input monitoring unit for monitoring an input of the filter bank; And
And an output monitoring unit for monitoring an output of the filter bank. The method according to claim 1,
The filter unit includes:
A delay tap for delaying the Ises repeater signal passing through the filter unit;
A coefficient multiplier for multiplying an output of the delay tap by a coefficient value; And
And a signal summing unit for summing the outputs of the coefficient multipliers and outputting a filter output. delete The method according to claim 1,
Wherein the filter value includes a complex number type. The method according to claim 1,
Wherein,
Further comprising monitoring the input of the filter unit based on the reference waveform to calculate the filter value. The method according to claim 1,
Wherein,
Further comprising monitoring the output of the filter unit based on the reference waveform to calculate the filter value. The method according to claim 1,
Wherein,
A filter waveform for displaying a reference waveform for setting filter information of the filter section;
A frequency setting menu which is a menu for setting the frequency of the filter unit;
A bandwidth setting menu which is a menu for setting a frequency bandwidth of the filter unit;
A spurious setting menu which is a menu for setting a spurious of the filter unit;
A ripple setting menu which is a menu for setting a ripple of the filter unit;
A group delay setting menu which is a menu for setting a group delay of the filter unit;
A coefficient value display unit for displaying the filter value of the filter unit;
A LUT display unit for displaying a value for storing at least one of the filter values having different use frequencies; And
A file for storing and loading at least one of the filter waveform, the frequency setting menu, the spurious setting menu, the ripple setting menu, the group delay setting menu, the count value display, the tab information display, menu; Wherein the user screen is configured to include at least one of the plurality of services. delete delete

Images