KR20100069374A - Multi-band digital pre-distortion repeater system and control method thereof - Google Patents

Abstract

PURPOSE: A multi-band digital pre-distortion repeater system and a control method thereof are provided to compensate the signal distortion by using a module. CONSTITUTION: A donor(100) transmits a frame to a remote place(300), and a frame is configured based on a digital or analog signal transmitted from a predetermined communication service equipment. For the distortion components of a digital or analog signal received form the donor, a remote performs individual compensation according to the service band of the communication service.

Description

Multi-band Digital Pre-Distortion Repeater System and Control Method

The present invention relates to a multi-band digital predistortion repeater system and a control method thereof. More particularly, the present invention relates to a multi-band digital signal capable of compensating for a distortion component of a signal using a module separated for each service band of a communication service. A predistortion repeater system and a control method thereof.

In the (mobile) communication system, a repeater system has been developed and applied to various types of systems for the purpose of expanding coverage and improving service shadow area. Wired repeater systems can be divided into analog and digital systems, and in the case of a multi-band system, there is a selective band use restriction as necessary. In this multi-band system, the size of the remote system, power consumption efficiency, and the like, which vary according to the band usage restrictions, depend on the system (eg, the AMP of the remote).

In a multi-service environment with continuous investment in repeater systems and CDMA / WCDMA / WiBro / other services, the selective use of bands in conventional multiband systems reduces investment efficiency and reduces the size of the system according to the choice of band usage. Due to the variability, there are obstacles in terms of network construction and operation, and the problem of low power consumption efficiency has continued.

Accordingly, an object of the present invention is to separate a remote digital predistortion amplifier (DPD AMP) for each service band of a communication service, and selectively separate and mount the plurality of separated digital predistortion amplifiers according to service classification. To provide a multi-band digital predistortion repeater system and a control method thereof.

Another object of the present invention is to provide a multi-band digital predistortion repeater system and a control method thereof, which can extend the aforementioned recoat into a branch or cascade according to a network design.

In order to achieve the above object, in the multi-band digital predistortion repeater system according to an aspect of the present invention, a donor for transmitting a frame composed of a digital or analog signal transmitted from a predetermined communication service equipment to a remote location donor; And a remote for individually compensating for the distortion component of the digital or analog signal received from the donor according to the service band of the communication service.

Preferably, the remote comprises: a first digital predistortion amplifier configured to compensate for distortion of the digital or analog signal corresponding to a first service band of the service bands; And a second digital predistortion amplifier configured to compensate for distortion of the digital or analog signal corresponding to a second service band of the service bands.

Preferably, the digital predistortion amplifier further comprises: a frame unit which deframes the digital or analog signal composed of a frame received from the donor; A signal processor that compensates for the distortion component of the de-framed digital or analog signal by the frame unit; A converter for converting the digital or analog signal compensated by the signal processor to an analog signal; A digital or analog converter for adjusting the frequency of the analog signal converted by the converter up; And an amplifier for amplifying the analog signal adjusted by the digital or analog converter into a high power signal.

Preferably, the first digital predistortion amplifier and the second digital predistortion amplifier can be detachable, and can be operated individually or in a connected state according to the detachment.

Preferably, the remote may be configured in plural according to a network design, and the plurality of remotes may be connected in at least one of a cascade form and a branch form. .

Preferably, in the case where the plurality of remotes are connected in the cascade form, the remote of the upper node may be equipped with a switch so as to bypass the service in the upper node (By-pass). .

In order to achieve the above object, in the remote of a multi-band digital predistortion repeater system comprising a donor and a remote according to another aspect of the present invention, in the digital or analog signal received from the donor, A first digital predistortion amplifier configured to compensate for distortion of a signal corresponding to a first service band of bands; And a second digital predistortion amplifier configured to compensate for distortion of the digital or analog signal corresponding to a second service band of the service bands.

Preferably, the digital predistortion amplifier, the frame unit for performing a deframe on the digital or analog signal consisting of a frame (frame) received from the donor; A signal processor that compensates for the distortion component of the de-framed digital or analog signal by the frame unit; A converter for converting the digital or analog signal compensated by the signal processor to an analog signal; A digital or analog converter for adjusting the frequency of the analog signal converted by the converter up; And an amplifier for amplifying the analog signal adjusted by the digital or analog converter into a high power signal.

Preferably, the first digital predistortion amplifier and the second digital predistortion amplifier can be detachable, and can be operated individually or in a connected state according to the detachment.

Preferably, the remote may be configured in plural according to a network design, and the plurality of remotes may be connected in at least one of a cascade form and a branch form. .

Preferably, when the plurality of remotes are connected in the cascade form, the remotes of the upper node may be equipped with a switch that is bypassed in case of service failure.

In order to achieve the above object, in the control method of a multi-band digital predistortion repeater system according to another aspect of the present invention, a frame composed of a digital or analog signal transmitted from a predetermined communication service equipment to a remote location Transmitting; Performing a deframe on the received digital or analog signal; Individually compensating for the distortion component of the deframed digital or analog signal according to a service band of the communication service; Converting the compensated digital or analog signal to an analog signal; Adjusting the frequency of the converted analog signal up; Amplifying the frequency-adjusted analog signal into a high power signal; And transmitting the amplified signal to a user terminal.

Preferably, the performing of the digital or analog signal compensation may include: performing compensation for distortion of the digital or analog signal corresponding to a first service band of the service band; And performing compensation for distortion of the digital or analog signal corresponding to a first service band of the service bands.

In order to achieve the above object, in a control method of a multi-band digital predistortion repeater system including a plurality of remotes connected in the form of a donor and cascade according to another aspect of the present invention, Transmitting, by the donor, a frame composed of a digital or analog signal transmitted from a predetermined communication service device to a remote place; Receiving from the donor the digital or analog signal, the plurality of remotes comprising frames; The plurality of remotes performing a predetermined digital predistortion process on the digital or analog signal in a higher node order; Determining whether a service failure occurs in any one of the remotes during the digital predistortion process; And when the service failure occurs in any one of the remotes, controlling the remotely generated service failure to be bypassed using its own switch.

In order to achieve the above object, in the remote manufacturing method of a multi-band digital predistortion repeater system comprising a donor and a remote according to another aspect of the present invention, a digital or analog signal transmitted from the donor Mounting a first digital predistortion amplifier inside the remote to compensate for a distortion of a signal corresponding to a first service band of the mobile station; And mounting a second digital predistortion amplifier adjacent to the first digital predistortion amplifier inside the remote to compensate for the distortion of the digital or analog signal corresponding to the second service band. .

Preferably, the method may further include connecting the plurality of remotes in at least one of a cascade form and a branch form according to the number corresponding to the network design. .

Preferably, when the plurality of remotes are connected in the cascade form, further comprising the step of mounting a switch to bypass (By-pass) in the event of a service failure in the remote of the upper node have.

According to the present invention by the above means, it is possible to design the remote including only the DPD AMP corresponding to the service band required in the multi-band environment, and to extend the remote into a branch or cascade form according to the network configuration.

As a result, it is expected to be able to construct an economical system that reduces unnecessary systems, to facilitate network construction and operation, and to improve power consumption efficiency.

Hereinafter, with reference to the accompanying drawings, it will be described in detail for the present invention.

1 is a block diagram of a multi-band digital predistortion repeater system in accordance with an embodiment of the present invention.

Referring to Figure 1, a multi-band digital predistortion repeater system according to an embodiment of the present invention includes a donor 100 and a remote (300).

The donor 100 converts digital or analog signals received from (mobile) communication service equipment such as CDMA / WCDMA / WiBro / other services into digital signals and constructs a frame via a digital signal processor to remotely configure the frame. It is provided to the 300 (components inside the donor 100 are not shown in the 'claims' for each element, it is shown by the dotted line).

The remote 300 may process digital or analog signals received from the donor 100 through digital predistortion amplifiers 310 and 330 for each service (compensation for distortion components of the digital or analog signals). And a first digital predistortion amplifier and a second digital predistortion amplifier (hereinafter, the digital pre-distortion amplifier will also be described as 'DPD AMP').

The first DPD AMP 310 performs compensation for distortion of the digital or analog signal corresponding to the first service band among the service bands of the digital or analog signal provided from the donor 100.

The second DPD AMP 330 compensates for the distortion of the digital or analog signal corresponding to the second service band of the service band of the digital or analog signal provided from the donor 100.

Here, in the above-described DPD AMP or service band, the first / second may indicate, for example, CDMA / WCDMA, a service provided for each band, and the first / second DPD AMP is separately provided for each service band. (It can be detached and can be operated individually or in a connected state according to the detachment) (the first / second number is just an example, and the DPD AMP can be implemented by the number according to service band classification). ).

Meanwhile, the digital or analog signal distortion compensation by the DPD AMPs 310 and 330 will be described below.

2 is a block diagram of a digital predistortion amplifier according to an embodiment of the present invention.

Referring to FIG. 2, the DPD AMP 310 compensates for distortion of a digital or analog signal received from the donor 100 for each service band, and includes a frame unit 311, a signal processor 313, and a converter. 315, digital or analog converter 317, and amplifier 319.

The frame unit 311 deframes a digital or analog signal composed of a frame received from the donor 100.

The signal processor 313 (DSP) performs compensation for the distortion component of the deframed digital or analog signal.

The compensation by the signal processor 313 will be described in more detail by receiving a framed digital or analog signal from the donor 100 and receiving and referring to distortion component information (eg, a coefficient value format) of the digital or analog signal. In addition, compensation for distortion components of a digital or analog signal may be performed. Typically, a digital prediction or analog signal received from the donor 100 by referring to the compensation prediction block for generating the distortion component information of the signal provided from the donor 100 and the distortion component information of the signal generated by the compensation prediction block . Although it can be implemented as a compensation signal processing block that directly compensates for the distortion component, it is described here as an integrated without distinguishing.

The converter 315 converts the digital or analog signal (digital signal) compensated by the signal processor 313 into an analog signal.

The digital or analog converter 317 up (or down) converts the analogized digital or analog signal converted by the converter 315 into a signal of a frequency band (depending on the characteristics of the user terminal) to be transmitted (UPC). / DNC corresponds to up converter / down converter).

The amplifier 319 amplifies the signal whose frequency is adjusted by the digital or analog converter 317 into a high power signal for antenna transmission. Here, the amplified high power signal may be transmitted to the user terminal through a filter (not shown in the claims, and shown by a dotted line).

3 is an explanatory diagram of a remote extension configuration of a multi-band digital predistortion repeater system according to an embodiment of the present invention, Figure 4 is a remote of the multi-band digital predistortion repeater system according to an embodiment of the present invention It is explanatory drawing about the switch which can be attached to a part.

As shown in FIG. 3, the remote of the multi-band digital predistortion repeater system may be implemented in a cascaded or branched form. This remote extension can efficiently network configuration, and there is an advantage in that additional services can be extended in the form of DPD AMP expansion without additional system construction by constructing a remote system once (as described above, the remote can be detached in plurality. Since the DPD AMP can be implemented as a remote extension (or connection) and the DPD AMP extension is collinear).

On the other hand, in the case of extending the remote as described above, in particular, in the case of configuring a system by extending the recoat in the cascade form, if a service failure occurs in the remote of the upper node, the service failure is serially connected to the remotes of the lower node. Problems may arise.

However, as shown in FIG. 4, when the switch is mounted on the second remote, the service is serially serviced to the remote of the lower node by controlling the remote to bypass even if a service failure occurs in the second remote. Problems that occur can be prevented.

5 is a flowchart illustrating a control method of a multi-band digital predistortion repeater system according to an embodiment of the present invention.

Hereinafter, an operation procedure of a control method of a multi-band digital predistortion repeater system according to an embodiment of the present invention will be described with reference to FIG. 5.

The frame configured based on the digital or analog signal transmitted from the predetermined communication service equipment is transmitted to the remote location (S101).

A deframe on the received digital or analog signal is performed (S102).

The distortion components of the deframed digital or analog signal are individually compensated according to the service band of the communication service (S103). Here, the performing of the digital or analog signal compensation (S103) may include compensating for the distortion of the digital or analog signal corresponding to the first service band and compensating for the distortion of the digital or analog signal corresponding to the second service band. (The first / second is merely an example, as described above, the distortion of the digital or analog signal can be compensated by the number according to service band division).

The compensated digital or analog signal is converted into an analog signal (S104).

The frequency of the converted analog signal is adjusted upward to match the transmission frequency band (S105).

The frequency-adjusted analog signal is amplified into a high power signal for antenna transmission (S106).

The amplified signal is transmitted to the user terminal (S107).

6 is a flowchart illustrating a control method of a multi-band digital predistortion repeater system including a plurality of remotes connected in a donor and cascade form according to an embodiment of the present invention.

Hereinafter, referring to FIG. 6, a control method of a multi-band digital predistortion repeater system including a plurality of remotes connected in a donor and cascade form according to an embodiment of the present invention. The operation sequence for the above will be described.

The donor 100 transmits a frame composed of a digital or analog signal transmitted from a predetermined communication service device to a remote location (S201).

A plurality of remote 300 receives a digital or analog signal consisting of a frame from the donor 100 (S202).

The plurality of remotes 300 performs digital predistortion processing on digital or analog signals in order of higher nodes (S203). As described above, the predetermined digital predistortion processing is performed.

It is determined whether a service failure occurs in any one of the remotes 300 during the digital predistortion process (S204).

When a service failure occurs in any one of the remote 300, the remote 300 having a service failure is controlled to bypass (By-Pass) using its own switch (S205), when the service failure does not occur in the remote 300 The remote 300 performs digital predistortion on the digital or analog signal in order of higher nodes again.

Here, steps S203 and S204 described above are described in a line / post order for convenience of illustration and description, and the plurality of remotes 300 perform digital predistortion processing of digital or analog signals in the order of higher nodes (S203). At the same time, the system may operate in such a manner as to determine whether there is a service failure (S204).

7 is a flowchart of a remote manufacturing method of a multi-band digital predistortion repeater system according to an embodiment of the present invention.

Hereinafter, an operation procedure of a remote manufacturing method of a multi-band digital predistortion repeater system according to an embodiment of the present invention will be described with reference to FIG. 7.

A first DPD AMP 310 for compensating for distortion of a signal corresponding to a first service band among digital or analog signals received from the donor 100 is mounted in the remote 300 (S301).

The second DPD AMP 330 corresponding to the second service band is mounted adjacent to the first DPD AMP 310 installed by the step S301 in the remote 300 (S302).

According to the number corresponding to the network design, the plurality of remotes 300 are connected in cascade or branch form (S303).

When the plurality of remotes 300 are connected in a cascade form, a switch for bypassing a service failure is mounted on the remote 300 of the upper node (S304).

Here, since the remote 300 may be implemented with a plurality of detachable DPD AMPs (eg, the first and second DPD AMPs), the extension (or connection) of the remote 300 and the expansion of the DPD AMP are on the same line. Same as described above.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

The present invention relates to a multi-band digital predistortion repeater system and a control method thereof. More particularly, the present invention relates to a multi-band digital signal capable of compensating for a distortion component of a signal using a module separated for each service band of a communication service. A predistortion repeater system and a control method thereof.

According to the present invention, it is possible to design a remote including only a DPD AMP corresponding to a service band required in a multi-band environment, and to extend the remote into branches or cascades according to the network configuration, thereby reducing unnecessary systems. It is expected to be able to construct an economical system, to easily build and operate a network, and to improve power consumption efficiency.

1 is a block diagram of a multi-band digital predistortion repeater system in accordance with an embodiment of the present invention.

2 is a block diagram of a digital predistortion amplifier according to an embodiment of the present invention.

3 is an explanatory diagram of a remote extension diagram of a multi-band digital predistortion repeater system according to an exemplary embodiment of the present invention.

4 is an explanatory diagram of a switch that can be mounted on a part of a remote of the multi-band digital predistortion repeater system according to an exemplary embodiment of the present invention.

5 is a flowchart illustrating a control method of a multi-band digital predistortion repeater system according to an embodiment of the present invention.

6 is a flowchart illustrating a control method of a multi-band digital predistortion repeater system including a plurality of remotes connected in a donor and cascade form according to an embodiment of the present invention.

7 is a flowchart of a remote manufacturing method of a multi-band digital predistortion repeater system according to an embodiment of the present invention.

<Brief description of the main parts of the drawing>

100: donor 300: remote

310 and 330: first and second digital predistortion amplifiers 311: frame portion

313: signal processor 315: converter

317: digital or analog converter 319: amplifier

Claims (17)

In a multi-band digital predistortion repeater system, A donor configured to remotely transmit a frame configured based on a digital or analog signal transmitted from a predetermined communication service device; And And a remote for individually compensating for the distortion component of the digital or analog signal received from the donor according to a service band of the communication service. Predistortion repeater system. The method of claim 1, The remote, A first digital predistortion amplifier configured to compensate for distortion of the digital or analog signal corresponding to a first service band of the service bands; And And a second digital predistortion amplifier configured to compensate for distortion of the digital or analog signal corresponding to a second service band of the service bands. The method of claim 2, The digital predistortion amplifier, A frame unit which deframes the digital or analog signal composed of a frame received from the donor; A signal processor that compensates for the distortion component of the de-framed digital or analog signal by the frame unit; A converter for converting the digital or analog signal compensated by the signal processor to an analog signal; A digital or analog converter for adjusting the frequency of the analog signal converted by the converter up; And And an amplifier for amplifying the analog signal up-adjusted by the digital or analog converter into a high power signal. The method of claim 2, And the first digital predistortion amplifier and the second digital predistortion amplifier are detachable and operable individually or in a connected state according to the detachment. The method according to claim 1 or 2, The remote may be configured in plural according to a network design, and the plurality of remotes may be connected in at least one of a cascade form and a branch form. system. The method of claim 5, Multi-band digital predistortion repeater system, characterized in that when the plurality of remotes are connected in the cascade form, the remote of the upper node is equipped with a switch so as to bypass the service in the upper node (By-pass) . In a remote of a multi-band digital predistortion repeater system comprising a donor and a remote, A first digital predistortion amplifier configured to compensate for distortion of a signal corresponding to a first service band of a service band in the digital or analog signal received from the donor; And And a second digital predistortion amplifier configured to compensate for distortion of the digital or analog signal corresponding to a second service band of the service bands. The method of claim 7, wherein The digital predistortion amplifier, A frame unit which deframes the digital or analog signal composed of a frame received from the donor; A signal processor that compensates for the distortion component of the de-framed digital or analog signal by the frame unit; A converter for converting the digital or analog signal compensated by the signal processor to an analog signal; A digital or analog converter for adjusting the frequency of the analog signal converted by the converter up; And And an amplifier for amplifying the analog signal up-adjusted by the digital or analog converter into a high power signal. 9. The method according to claim 7 or 8, And the first digital predistortion amplifier and the second digital predistortion amplifier are removable and operable individually or in a connected state according to the detachment. The method of claim 7, wherein The remote is configured in plurality in accordance with the network design, the plurality of remote is characterized in that connected to at least one of the cascade (branch) form and branch (branch) form. The method of claim 10, And when the plurality of remotes are connected in the cascade form, the remote of the upper node includes a switch that is bypassed in case of service failure. In the control method of a multi-band digital predistortion repeater system, Transmitting a frame composed of a digital or analog signal transmitted from a predetermined communication service device to a remote location; Performing a deframe on the received digital or analog signal; Individually compensating for the distortion component of the deframed digital or analog signal according to a service band of the communication service; Converting the compensated digital or analog signal to an analog signal; Adjusting the frequency of the converted analog signal up; Amplifying the frequency-adjusted analog signal into a high power signal; And And transmitting the amplified signal to a user terminal. The method of claim 12, Performing the digital or analog signal compensation, Performing compensation for distortion of the digital or analog signal corresponding to a first service band of the service bands; And And compensating for the distortion of the digital or analog signal corresponding to the first service band of the service bands. In the control method of a multi-band digital predistortion repeater system comprising a plurality of remotes connected in the form of a donor and cascade, Transmitting, by the donor, a frame composed of a digital or analog signal transmitted from a predetermined communication service device to a remote place; Receiving from the donor the digital or analog signal, the plurality of remotes comprising frames; The plurality of remotes performing a predetermined digital predistortion process on the digital or analog signal in a higher node order; Determining whether a service failure occurs in any one of the remotes during the digital predistortion process; And And when the service failure occurs in any one of the remotes, controlling the remote service having a service failure to bypass by using a switch thereof. Control method of the system. In the remote manufacturing method of a multi-band digital predistortion repeater system comprising a donor and a remote, Mounting a first digital predistortion amplifier inside the remote to compensate for distortion of a signal corresponding to a first service band among digital or analog signals received from the donor; And And mounting a second digital predistortion amplifier adjacent to the first digital predistortion amplifier inside the remote to compensate for the distortion of the digital or analog signal corresponding to the second service band. Remote manufacturing method of digital predistortion repeater system. The method of claim 15, And connecting the plurality of remotes in at least one of a cascade form and a branch form, according to the number corresponding to the network design. Remote manufacturing method of repeater system. The method of claim 16, When the plurality of remotes are connected in the cascade form, the multi-band digital pre-transmission further comprising the step of mounting a switch to bypass (By-pass) in the event of a service failure in the remote of the upper node Remote manufacturing method of distortion repeater system.

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