KR102071612B1 - Intelligent type DMB relaying apparatus and method thereof - Google Patents

Intelligent type DMB relaying apparatus and method thereof Download PDF

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KR102071612B1
KR102071612B1 KR1020190089089A KR20190089089A KR102071612B1 KR 102071612 B1 KR102071612 B1 KR 102071612B1 KR 1020190089089 A KR1020190089089 A KR 1020190089089A KR 20190089089 A KR20190089089 A KR 20190089089A KR 102071612 B1 KR102071612 B1 KR 102071612B1
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signal
broadcast channel
dmb
channel signal
filter
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김인중
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(주)미디어디바이스
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/02—Arrangements for relaying broadcast information
    • H04H20/06—Arrangements for relaying broadcast information among broadcast stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
    • H04B1/0039—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage using DSP [Digital Signal Processor] quadrature modulation and demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15564—Relay station antennae loop interference reduction
    • H04B7/15585—Relay station antennae loop interference reduction by interference cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/11—Aspects of broadcast communication characterised by the type of broadcast system digital multimedia broadcasting [DMB]

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radio Relay Systems (AREA)

Abstract

The present invention relates to an intelligent DMB relay apparatus capable of relaying an original channel signal with high clarity and a method thereof. According to the present invention, the intelligent DMB relay apparatus comprises: a reception antenna installed in a radio wave shadow area; a DMB band-pass filter filtering only a broadcasting channel signal with respect to a DMB band among broadcasting channel signals received from the reception antenna; a low-noise amplifier removing noise from the filtered broadcasting channel signal received from the DMB band-pass filter and amplifying the magnitude of the received signal to generate an amplified broadcasting channel signal; an intelligent DMB digital channel filter processing a broadcasting channel signal, which is synthesized with an inverse phase signal with respect to an interference signal between two simultaneously adjacent broadcasting channel signals among the broadcasting channel signals amplified in the low noise amplifier, into a broadcasting channel signal converted into an RF signal and outputting the converted broadcasting channel signal by a predetermined size to suppress the interference signal generated between the two simultaneously adjacent broadcasting channels when the broadcasting channel signal is amplified in a high-power amplifier; the high-power amplifier amplifying the broadcasting channel signal transferred from the intelligent DMB digital channel filter by high power to generate the broadcasting channel signal in which the interference signal is suppressed; a DMB band-pass filter filtering only the broadcasting channel signal with respect to a DMB band among the broadcasting channel signals amplified in the high-power amplifier; and a transmission antenna transmitting and relaying the broadcasting channel signal filtered by the DMB band-pass filter.

Description

지능형 DMB 중계장치 및 그 방법{Intelligent type DMB relaying apparatus and method thereof}Intelligent DMB relay apparatus and its method {Intelligent type DMB relaying apparatus and method}

본 발명은 지능형 DMB 중계장치 및 그 방법에 관한 것으로, 보다 상세하게는, 전파음영지역에서 DMB 방송을 중계하는 중계장치에 있어서, 사용대역 내의 인접한 2채널 또는 2개의 앙상블(ensemble) 동시 중계시 발생되는 간섭신호를 능동적으로 제거하여 높은 명료도를 가지는 원사용 채널신호의 중계를 가능하게 할 수 있는 지능형 DMB 중계장치 및 그 방법에 관한 것이다. The present invention relates to an intelligent DMB relay device and a method thereof, and more particularly, to a relay device for relaying DMB broadcasts in a radio shade area, when two adjacent channels or two ensembles in a use band are simultaneously relayed. The present invention relates to an intelligent DMB relay apparatus and method capable of actively removing an interference signal to enable relaying of a raw channel signal having a high clarity.

일반적으로, 도로나 철도 건설 등에 따른 터널이나 산악지형 또는 고층 건물 등에 의한 지하 구간 등과 같은 전파음영지역은 건축적 차폐물에 의하여 차단된 방송의 재전송을 목적으로 하는 방송용 중계장치가 설치되어야 한다.In general, radio shade areas such as tunnels, mountainous terrain, or underground sections by high-rise buildings, such as roads or railway construction, should be provided with a broadcast relay device for the purpose of retransmission of broadcasts blocked by architectural shields.

즉, 상기와 같은 전파음영지역에서는, 수신안테나를 설치하여 수신공중선으로부터 다수의 방송채널을 수신하는 과정에서 수신공중선으로부터 방송국송신소까지의 거리나 다중결로 손실의 차이로 인하여 수신한 신호의 각 채널간 전계강도의 차이가 발생된다.That is, in the radio shade area as described above, in the process of receiving a plurality of broadcast channels from the receiving air line by installing a receiving antenna, due to the difference between the distance from the receiving air line to the broadcasting station transmitting station or the multiple condensation loss, each channel of the received signal A difference in field strength occurs.

이에, 종래의 방송용 중계장치는, 대부분 수신안테나를 설치한 후 수신공중선으로부터 입력된 반송파 신호를 단순히 증폭하는 방식으로서 저비용 및 장치 구조의 단순화를 가능하게 한다. Accordingly, the conventional broadcast relay device is a method of simply amplifying a carrier signal input from a receiving air line after installing a receiving antenna mostly to enable low cost and simplify the device structure.

또한, 송수신 과정에서 변복조를 실시하지 않고 단순 증폭함에 따라 주파수 대역별 응답특성이 동일하여 어떠한 형태의 변조방식이나 다중화 방식도 수용이 가능하여 향후 중계 대역 내에서 디지털 방송의 전환이 어떠한 방식으로 진행되어도 장치에 대한 설비의 추가나 재조정 없이 즉각 대응이 가능한 장점이 있다.Also, by simply amplifying without performing demodulation and demodulation in the transmission and reception process, the response characteristics of each frequency band are the same, so that any type of modulation or multiplexing method can be accommodated. The advantage is immediate response without the need for additional equipment or reconditioning of the equipment.

그러나 종래의 방송용 중계장치는, 단순히 수신되는 반송파 신호를 증폭 중계하는 구조를 가지기 때문에, DMB 방송 등과 같은 협대역에서는 7번 채널에서 13번 채널까지 동시에 인접한 2개의 원사용 채널신호의 중계 및 증폭시 간섭신호가 동일한 대역 내에 발생되고, 이에, 상기 간섭신호가 해당 대역의 원사용 채널신호와 함께 출력 및 중계되어 해당 방송의 명료도가 저하되는 문제점이 있다.However, since the conventional broadcast relay has a structure of simply amplifying and relaying a received carrier signal, in a narrow band such as a DMB broadcast, two adjacent channel signals, which are simultaneously adjacent to channels 7 to 13, may be relayed and amplified. The interference signal is generated in the same band, and thus, the interference signal is output and relayed together with the original channel signal of the corresponding band, thereby reducing the intelligibility of the broadcast.

(특허문헌 0001) 등록특허 제10-1492840호(Patent Document 0001) Registered Patent No. 10-1492840

(특허문헌 0002) 등록특허 제10-0891479호(Patent Document 0002) Registered Patent No. 10-0891479

따라서 본 발명의 목적은 전파음영지역에서 DMB 방송을 중계하는 중계장치에 있어서, 동시에 인접한 2개 채널의 중계시 발생되는 채널신호들 간의 간섭신호를 능동적으로 제거하여 높은 명료도를 가지는 원사용 채널신호의 중계를 가능하게 할 수 있는 지능형 DMB 중계장치 및 그 방법을 제공하는 것이다.Accordingly, an object of the present invention is to provide a repeater for relaying DMB broadcasting in a radio shade area, and actively removes interference signals between channel signals generated during relaying of two adjacent channels at the same time. It is to provide an intelligent DMB relay device and a method for enabling relaying.

한편, 본 발명의 목적은 이상에서 언급한 목적으로 제한되지 않으며, 언급되지 않은 다른 목적들은 아래의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.On the other hand, the object of the present invention is not limited to the above-mentioned object, other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

이를 위하여, 본 발명에 의하면, 전파음영지역에 설치되는 수신안테나; 수신안테나로부터 수신되는 방송채널신호 중 DMB 대역에 대한 방송채널신호만을 필터링하는 DMB대역필터; DMB대역필터로부터 필터링된 방송채널신호 중 잡음을 제거한 후 수신된 신호의 크기를 증폭시켜 증폭된 방송채널신호를 생성하는 저잡음증폭기; 저잡음증폭기에서 증폭된 방송채널신호 중 동시에 인접한 2개의 방송채널신호들간의 간섭신호에 대한 역위상 신호가 합성된 방송채널신호를 RF 신호로 전환된 방송채널신호로 처리한 후 일정 크기로 출력하여 고출력증폭기에서 방송채널신호의 증폭시 동시에 인접한 2개의 방송채널들간에 발생되는 간섭신호가 억압되도록 하는 지능형DMB디지털채널필터; 지능형DMB디지털채널필터로부터 전달되는 방송채널신호를 높은 출력으로 증폭시켜 간섭신호가 억압된 방송채널신호를 생성하는 고출력증폭기; 고출력증폭기에서 증폭된 방송채널신호 중 DMB 대역에 대한 방송채널신호만을 필터링하는 DMB대역필터; 및 DMB대역필터에 의해 필터링된 방송채널신호를 송출 및 중계하는 송신안테나를 포함하는 지능형 DMB 중계장치가 제공된다.To this end, according to the invention, the receiving antenna is installed in the radio shade area; A DMB band filter for filtering only the broadcast channel signal for the DMB band among the broadcast channel signals received from the reception antenna; A low noise amplifier which removes noise from the broadcast channel signals filtered by the DMB band filter and amplifies the received signal to generate an amplified broadcast channel signal; The high-power output is processed by processing the broadcast channel signal synthesized with the anti-phase signal for the interference signal between two adjacent broadcast channel signals among the amplified broadcast channel signals in the low noise amplifier into the broadcast channel signal converted into the RF signal, and outputting it to a certain size. An intelligent DMB digital channel filter for suppressing interference signals generated between two adjacent broadcast channels simultaneously when amplifying a broadcast channel signal in an amplifier; A high output amplifier for amplifying a broadcast channel signal transmitted from an intelligent DMB digital channel filter to a high output to generate a broadcast channel signal suppressed with an interference signal; A DMB band filter for filtering only a broadcast channel signal for a DMB band among the broadcast channel signals amplified by the high output amplifier; And a transmission antenna for transmitting and relaying the broadcast channel signal filtered by the DMB band pass filter.

여기서, 지능형DMB디지털채널필터는, 저잡음증폭기로부터 전달되는 방송채널신호의 DMB 대역에 대한 방송채널신호만이 필터링되도록 하는 DMB디지털필터기; DMB디지털필터기에 의해 출력되는 방송채널신호나 방송채널신호들 사이의 간섭신호에 대한 역위상 신호가 합성된 방송채널신호의 이득을 설정된 값으로 제어하고 고출력증폭기에 전달하는 이득제어기; 고출력증폭기로부터 출력되는 방송채널신호 중 간섭신호를 검출하는 DMB신호검출기; 및 DMB신호검출기로부터 검출된 간섭신호에 대응된 역위상 신호를 생성하고 방송채널신호에 합성하여 고출력증폭기에서 증폭시 발생되는 간섭신호가 억압되도록 하는 방송채널신호를 아날로그 변환 처리하여 RF 신호로 전환된 방송채널신호를 출력하여 이득제어기(를 통하여 고출력증폭기에 출력되도록 하는 간섭신호억압기를 포함하는 것이 바람직하다.Here, the intelligent DMB digital channel filter includes: a DMB digital filter for filtering only the broadcast channel signal for the DMB band of the broadcast channel signal transmitted from the low noise amplifier; A gain controller for controlling a gain of a broadcast channel signal output by the DMB digital filter or an interphase signal with respect to interference signals between the broadcast channel signals to a predetermined value and transferring the gain to a high output amplifier; A DMB signal detector for detecting an interference signal among broadcast channel signals output from the high power amplifier; And converting the broadcast channel signal into an RF signal by generating an anti-phase signal corresponding to the interference signal detected from the DMB signal detector, synthesizing it with the broadcast channel signal, and converting the broadcast channel signal to suppress the interference signal generated during amplification in the high output amplifier. It is preferable to include an interference signal suppressor which outputs a broadcast channel signal and outputs it to a high output amplifier through a gain controller.

따라서 본 발명에 의하면, DMB 사용대역의 동시에 인접한 2개 채널의 중계시 발생되는 채널신호들 간의 간섭신호를 능동적으로 제거하여 높은 명료도를 가지는 원사용 채널신호의 중계를 가능하게 할 수 있다. Therefore, according to the present invention, it is possible to actively remove the interference signal between channel signals generated during the relaying of two adjacent channels simultaneously in the DMB use band, thereby enabling the relaying of the raw channel signal having a high clarity.

한편, 본 발명의 효과는 이상에서 언급한 효과로 제한되지 않으며, 언급되지 않은 다른 효과들은 청구범위의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.On the other hand, the effects of the present invention is not limited to the effects mentioned above, other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

도 1은 본 발명의 바람직한 실시예에 따른 지능형 DMB 중계장치의 구성을 개략적으로 나타낸 구성도;
도 2는 도 1의 지능형 DMB 중계장치에 있어서 지능형DMB디지털채널필터의 구성을 나타낸 구성도;
도 3은 도 2의 지능형 DMB 중계장치에 있어서 지능형DMB디지털채널필터 중 간섭신호를 제거하는 구성을 상세하게 나타낸 구성도;
도 4는 도 1의 지능형 DMB 중계장치에 있어서 각 구성부들에 의해 처리되는 채널신호의 파형을 순서대로 나타낸 도면; 및
도 5는 본 발명의 바람직한 실시예에 따른 지능형 DMB 중계방법을 나타낸 제어흐름도이다.1 is a configuration diagram schematically showing the configuration of an intelligent DMB relay apparatus according to an embodiment of the present invention;
2 is a block diagram showing the configuration of an intelligent DMB digital channel filter in the intelligent DMB relay of FIG.
3 is a detailed block diagram illustrating a configuration of removing an interference signal among intelligent DMB digital channel filters in the intelligent DMB relay of FIG. 2;
FIG. 4 is a view showing waveforms of channel signals processed by respective components in the intelligent DMB relay of FIG. 1 in sequence; FIG. And
5 is a control flowchart illustrating an intelligent DMB relaying method according to a preferred embodiment of the present invention.

이하, 첨부된 도면을 참조하면서 본 발명의 바람직한 실시예에 대하여 상세히 설명하기로 한다. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

먼저, 도 1 내지 도 5에 도시된 바와 같이, 본 발명의 바람직한 실시예에 따른 지능형 DMB 중계장치는, 전파음영지역에 설치되는 수신안테나(10), 수신안테나(10)로부터 수신되는 방송채널신호(A) 중 DMB 대역에 대한 방송채널신호(B)만을 필터링하는 DMB대역필터(20), DMB대역필터(20)로부터 필터링된 방송채널신호(B) 중 잡음을 제거한 후 수신된 신호의 크기를 증폭시켜 증폭된 방송채널신호(C)를 생성하는 저잡음증폭기(30), 저잡음증폭기(30)에서 증폭된 방송채널신호(C) 중 동시에 인접한 2개의 방송채널신호(C)들간의 간섭신호에 대한 역위상 신호(RDFN)가 합성된 방송채널신호(D)를 RF 신호로 전환된 방송채널신호(E)로 처리한 후 일정 크기로 출력하여 고출력증폭기(40)에서 방송채널신호(E)의 증폭시 동시에 인접한 2개의 방송채널들간에 발생되는 간섭신호가 억압되도록 하는 지능형DMB디지털채널필터(100), 지능형DMB디지털채널필터(100)로부터 전달되는 방송채널신호(E)를 높은 출력으로 증폭시켜 간섭신호가 억압된 방송채널신호(F)를 생성하는 고출력증폭기(40), 고출력증폭기(40)에서 증폭된 방송채널신호(F) 중 DMB 대역에 대한 방송채널신호(G)만을 필터링하는 DMB대역필터(50) 및 DMB대역필터(50)에 의해 필터링된 방송채널신호(G)를 송출 및 중계하는 송신안테나(60) 등을 포함한다.First, as shown in Figures 1 to 5, the intelligent DMB relay device according to a preferred embodiment of the present invention, the broadcast channel signal received from the receiving antenna 10, the receiving antenna 10 is installed in the radio shade area The noise of the broadcast channel signal B filtered from the DMB band filter 20 and the DMB band filter 20 that filters only the broadcast channel signal B for the DMB band among (A) is removed, and then the size of the received signal is adjusted. A low noise amplifier 30 that amplifies and generates an amplified broadcast channel signal C, and an interference signal between two adjacent broadcast channel signals C simultaneously among the broadcast channel signals C amplified by the low noise amplifier 30 Amplifying the broadcast channel signal E in the high power amplifier 40 by processing the broadcast channel signal D synthesized with the anti-phase signal RDFN into the broadcast channel signal E converted into the RF signal and outputting the same in a predetermined size. Interference signals generated between two adjacent broadcast channels at the same time are suppressed A high output amplifier which amplifies the broadcast channel signal E transmitted from the intelligent DMB digital channel filter 100 and the intelligent DMB digital channel filter 100 to a high output to generate a broadcast channel signal F in which interference signals are suppressed. 40, the broadcast filtered by the DMB band filter 50 and the DMB band filter 50 for filtering only the broadcast channel signal (G) for the DMB band of the broadcast channel signal (F) amplified by the high output amplifier (40) And a transmission antenna 60 for transmitting and relaying the channel signal G.

수신안테나(10)와 송신안테나(60)는, 각각 전파음영지역에 하나 이상이 설치되고, 공중파 신호와 이동통신신호의 송수신이 가능한 도너 안테나와 리모트 안테나 등으로 구성될 수 있다.One or more receiving antennas 10 and 60 transmitting antennas may be provided in a radio shade area, respectively, and may include a donor antenna and a remote antenna capable of transmitting and receiving air signals and mobile communication signals.

DMB대역필터(20)는, 수신안테나(10)로부터 수신되는 방송채널신호(A) 중 DMB 대역에 대한 방송채널신호(B)만을 필터링하는 수단으로서, 공지의 구성을 가질 수 있으므로 상세한 설명은 생략하기로 한다.The DMB band filter 20 is a means for filtering only the broadcast channel signal B for the DMB band among the broadcast channel signals A received from the reception antenna 10. Since the DMB band filter 20 may have a known configuration, detailed description thereof will be omitted. Let's do it.

저잡음증폭기(30)는, DMB대역필터(20)로부터 필터링된 방송채널신호(B) 중 잡음을 제거한 후 수신된 신호의 크기를 증폭시켜 증폭된 방송채널신호(C)를 생성하는 수단으로서, 상기 방송채널신호(B)를 선형 증폭하여 전력 레벨이 낮은 신호를 증폭하며, 공지의 구성을 가질 수 있으므로 상세한 설명은 생략하기로 한다.The low noise amplifier 30 is a means for generating an amplified broadcast channel signal C by amplifying a magnitude of a received signal after removing noise from the broadcast channel signal B filtered from the DMB band filter 20. Linear amplification of the broadcast channel signal (B) to amplify a signal having a low power level, and may have a known configuration, detailed description thereof will be omitted.

지능형DMB디지털채널필터(100)는, 저잡음증폭기(30)에서 증폭된 방송채널신호(C) 중 동시에 인접한 2개의 방송채널신호(C)들간의 간섭신호에 대한 역위상 신호(RDFN)가 합성된 방송채널신호(D)를 RF 신호로 전환된 방송채널신호(E)로 처리한 후 일정 크기로 출력하여 고출력증폭기(40)에서 방송채널신호(E)의 증폭시 동시에 인접한 2개의 방송채널들간에 발생되는 간섭신호가 억압되도록 하는 수단으로서, 저잡음증폭기(30)로부터 전달되는 방송채널신호(C)의 DMB 대역에 대한 방송채널신호(C)만이 필터링되도록 하는 DMB디지털필터기(110), DMB디지털필터기(110)에 의해 출력되는 방송채널신호(C)나 방송채널신호(C)들 사이의 간섭신호에 대한 역위상 신호(RDFN)가 합성된 방송채널신호(E)의 이득을 설정된 값으로 제어하고 고출력증폭기(40)에 전달하는 이득제어기(120), 고출력증폭기(40)로부터 출력되는 방송채널신호(C) 중 간섭신호를 검출하는 DMB신호검출기(130) 및 DMB신호검출기(130)로부터 검출된 간섭신호에 대응된 역위상 신호(RDFN)를 생성하고 방송채널신호(C)에 합성하여 고출력증폭기(40)에서 증폭시 발생되는 간섭신호가 억압되도록 하는 방송채널신호(D)를 아날로그 변환 처리하여 RF 신호로 전환된 방송채널신호(E)를 출력하여 이득제어기(120)를 통하여 고출력증폭기(40)에 출력되도록 하는 간섭신호억압기(150) 등을 포함한다. The intelligent DMB digital channel filter 100 synthesizes an anti-phase signal (RDFN) for an interference signal between two adjacent broadcast channel signals (C) simultaneously among the broadcast channel signals (C) amplified by the low noise amplifier (30). The broadcasting channel signal D is processed into a broadcasting channel signal E converted into an RF signal, and then output in a predetermined size to amplify the broadcasting channel signal E in the high output amplifier 40 between two adjacent broadcasting channels simultaneously. As a means for suppressing the generated interference signal, the DMB digital filter 110, DMB digital to filter only the broadcast channel signal (C) for the DMB band of the broadcast channel signal (C) transmitted from the low noise amplifier (30) The gain of the broadcast channel signal E synthesized with the anti-phase signal RDFN for the interference signal between the broadcast channel signal C or the broadcast channel signals C output by the filter 110 is set to a set value. Gain controller 120 for controlling and transmitting to the high power amplifier 40, high The DMB signal detector 130 for detecting the interference signal among the broadcast channel signals C output from the output amplifier 40 and the anti-phase signal RDFN corresponding to the interference signal detected from the DMB signal detector 130 are generated. By converting the broadcast channel signal (D) synthesized to the broadcast channel signal (C) so that the interference signal generated during the amplification in the high output amplifier 40 is suppressed by analog conversion, and outputting the broadcast channel signal (E) converted into an RF signal. And an interference signal suppressor 150 to be output to the high power amplifier 40 through the gain controller 120.

DMB디지털필터기(110)는, DMB 대역 대의 방송채널신호(C)만을 출력하기 위한 수단으로서, 저잡음증폭기(30)로부터 입력되는 방송채널신호(C)를 디지털 변환 처리하는 제1A/D변환기(111)와, 제1A/D변환기(111)에서 디지털 변환된 방송채널신호(C) 중 DMB 대역에 대한 방송채널신호(C)만이 필터링되도록 하는 DSPDMB필터기(112)로 구성된다.The DMB digital filter 110 is a means for outputting only the broadcast channel signal C in the DMB band, and includes a first A / D converter for digitally converting the broadcast channel signal C input from the low noise amplifier 30. 111 and a DSPDMB filter 112 for filtering only the broadcast channel signal C for the DMB band among the broadcast channel signals C digitally converted by the first A / D converter 111.

이득제어기(120)는, DMB디지털필터기(110)에 의해 출력되는 고출력증폭기(40)에서 증폭시 간섭신호가 발생되는 방송채널신호(C)나 간섭신호가 억압되도록 하는 방송채널신호(E)의 이득을 설정된 값으로 제어하고 고출력증폭기(40)에 전달하는 수단으로서, 방송채널신호(C 또는 E)의 이득을 미리 설정된 크기로 자동 제어하며, 공지의 구성을 가질 수 있으므로 상세한 설명은 생략하기로 한다.The gain controller 120 is a broadcast channel signal E for suppressing a broadcast channel signal C or an interference signal generated when the amplification signal is amplified by the high output amplifier 40 output by the DMB digital filter 110. As a means for controlling the gain of the signal to a predetermined value and transmitting it to the high output amplifier 40, the gain of the broadcast channel signal C or E is automatically controlled to a predetermined size, and may have a known configuration. Shall be.

DMB신호검출기(130)는, 고출력증폭기(40)로부터 출력되는 방송채널신호(C) 중 간섭신호를 검출하는 수단으로서, 후술된 DMB대역필터(50)로부터 출력되는 고출력증폭기(40)를 통해 증폭시 동시에 인접한 2개 채널들에 의해 간섭신호가 발생되는 방송채널신호(C)를 토대로 원채널 신호들과 이들의 간섭신호를 검출하며, 공지의 구성을 가질 수 있으므로 상세한 설명은 생략하기로 한다. The DMB signal detector 130 is a means for detecting an interference signal among the broadcast channel signals C output from the high output amplifier 40 and amplified by the high output amplifier 40 output from the DMB band filter 50 described later. The original channel signals and their interference signals are detected on the basis of the broadcast channel signal C, in which interference signals are generated by two adjacent channels at the same time, and may have a known configuration.

간섭신호억압기(150)는, DMB신호검출기(130)로부터 검출된 간섭신호에 대응된 역위상 신호(RDFN)를 생성하고 방송채널신호(C)에 합성하여 간섭신호가 억압된 방송채널신호(E)를 출력하기 위한 수단으로서, DMB신호검출기(130)로부터 궤환되는 간섭신호가 발생된 방송채널신호(C)를 디지털 변환 처리하여 디지털간섭신호(DFN)를 생성하는 제2A/D변환기(151), 제2A/D변환기(151)의 디지털간섭신호(DFN)에 대한 역위상 신호(RDFN)를 발생시키는 역위상신호발생기(152), DSPDMB필터기(112)로부터 방송채널신호(C)와 역위상신호발생기(151)로부터 역위상 신호(RDFN)를 전달받아 상호간 합성하여 후술된 고출력증폭기(40)의 증폭시 간섭신호가 업압되는 방송채널신호(D)로 출력하는 DSP신호합성기(153) 및 DSP신호합성기(153)에 의해 생성된 간섭신호가 억압되는 방송채널신호(D)를 아날로그 변환 처리하여 RF 신호로 전환된 방송채널신호(E)를 생성하는 D/A변환기(154) 등을 포함한다.The interference signal suppressor 150 generates an anti-phase signal RDFN corresponding to the interference signal detected by the DMB signal detector 130, synthesizes the broadcast signal (C), and suppresses the interference channel signal ( E) a second A / D converter 151 for digitally converting the broadcast channel signal C from which the interference signal fed back from the DMB signal detector 130 is generated to generate a digital interference signal DFN as a means for outputting the EMB. ), The antiphase signal generator 152 for generating the antiphase signal RDFN for the digital interference signal DFN of the second A / D converter 151 and the broadcast channel signal C from the DSPDMB filter 112; The DSP signal synthesizer 153 receives the anti-phase signal RDFN from the anti-phase signal generator 151 and synthesizes each other and outputs the interference signal as a broadcast channel signal D during the amplification of the high output amplifier 40 described below. And a broadcast channel signal (D) in which the interference signal generated by the DSP signal synthesizer 153 is suppressed. And a D / A converter 154 for converting and generating a broadcast channel signal E converted to an RF signal.

따라서 지능형DMB디지털채널필터(100)에 의하면, 이득 제어나 증폭시 간섭신호가 발생되는 방송채널신호(C)에 간섭신호 부분에 대응되는 역위상 신호(RDFN)를 합성하여 이득 제어나 증폭시 간섭신호를 억압 또는 제거하여 간섭신호가 억압된 방송채널신호(E)로 출력함으로써, DMB 대역의 인접한 2개의 방송채널신호를 중계시 발생되는 간섭신호를 능동적 또는 지능적으로 제거할 수 있다.Therefore, according to the intelligent DMB digital channel filter 100, the anti-phase signal (RDFN) corresponding to the interference signal portion is synthesized by the broadcast channel signal (C) where the interference signal is generated during the gain control or the amplification, and the interference during the gain control or the amplification. By suppressing or removing the signal and outputting it as a broadcast channel signal E in which the interference signal is suppressed, it is possible to actively or intelligently remove the interference signal generated when relaying two adjacent broadcast channel signals in the DMB band.

고출력증폭기(40)는, 송신안테나(60)를 통해 지능형DMB디지털채널필터(100)로부터 전달되는 DMB 대역의 방송채널신호(E)가 고출력의 방송채널신호(F)로 증폭되도록 하는 수단으로서, 방송채널신호(E)의 증폭시 인접한 2개의 방송채널신호에 의해 발생되는 간섭신호가 억압된 원채널 신호만을 가지는 방송채널신호(F)가 출력되도록 하며, 바람직하게는, 이득이 적은 선형 증폭기인 것이 좋고, 이를 통하여, 증폭시 고조파 신호의 발생과 이에 따른 왜곡이 최소화되도록 하는 것이 좋다.The high output amplifier 40 is a means for amplifying the broadcast channel signal E of the DMB band transmitted from the intelligent DMB digital channel filter 100 through the transmission antenna 60 into a high output broadcast channel signal F. When amplifying the broadcast channel signal E, a broadcast channel signal F having only one channel signal suppressed by interference signals generated by two adjacent broadcast channel signals is output. Preferably, the linear amplifier has a low gain. In this case, it is preferable that the generation of harmonic signals and the distortion thereof are minimized during amplification.

DMB대역필터(50)는, 고출력증폭기(40)에서 증폭된 방송채널신호(F) 중 DMB 대역에 대한 방송채널신호(G)만을 필터링하는 수단으로서, 공지의 구성을 가질 수 있으므로 상세한 설명은 생략하기로 한다.The DMB band filter 50 is a means for filtering only the broadcast channel signal G for the DMB band among the broadcast channel signals F amplified by the high output amplifier 40. Since the DMB band filter 50 may have a known configuration, detailed description thereof is omitted. Let's do it.

이하, 본 발명의 바람직한 실시예에 따른 지능형 DMB 중계방법에 대해 설명하기로 한다.Hereinafter, an intelligent DMB relay method according to an exemplary embodiment of the present invention will be described.

먼저, 전파음영지역에 설치된 수신안테나(10)에 방송국으로부터 DMB 대역의 방송채널신호(A)들이 수신된다(S100).First, the broadcast channel signals A of the DMB band are received from the broadcast station in the reception antenna 10 installed in the radio shade region (S100).

이후, DMB대역필터(20)에 의해 수신안테나(10)로부터 수신된 방송채널신호(A) 중 DMB 대역에 대한 방송채널신호(B)만이 필터링된다(S110).Thereafter, only the broadcast channel signal B for the DMB band among the broadcast channel signals A received from the reception antenna 10 is filtered by the DMB band filter 20 (S110).

이후, 저잡음증폭기(30)에 의해 DMB대역필터(20)로부터 필터링된 방송채널신호(B)들의 잡음이 제거된 후 수신된 신호의 크기가 증폭되어 방송채널신호(C)가 생성된다(S120).Thereafter, the noise of the broadcast channel signals B filtered from the DMB band filter 20 is removed by the low noise amplifier 30, and then the magnitude of the received signal is amplified to generate the broadcast channel signal C (S120). .

여기서, DMB 대역에서 방송채널신호(C)는 후술된 이득 제어나 고출력 증폭시 동시에 인접한 2개의 방송채널들(일예로, 7CH과 8CH 또는 7CH과 9CH)간에 발생되는 간섭신호가 발생된다.Here, in the DMB band, an interference signal generated between two adjacent broadcast channels (for example, 7CH and 8CH or 7CH and 9CH) is generated at the same time during gain control or high output amplification.

이후, 지능형DMB디지털채널필터(100)에 의해 저잡음증폭기(30)에서 증폭된 방송채널신호(C)에 방송채널신호(C)들간의 간섭신호에 대한 역위상 신호(RDFN)가 합성된 방송채널신호(D)가 RF 신호로 전환된 방송채널신호(E)로 처리된 후 일정 크기로 출력된다(S130).Subsequently, a broadcast channel obtained by synthesizing an anti-phase signal (RDFN) for an interference signal between the broadcast channel signals (C) and the broadcast channel signal (C) amplified by the low noise amplifier (30) by the intelligent DMB digital channel filter (100). The signal D is processed into the broadcast channel signal E converted into the RF signal and then output in a predetermined size (S130).

여기서, 상기 S130단계의 지능형DMB디지털채널필터(100)는 다음과 같은 과정을 통하여 간섭신호가 제거된 방송채널신호(E)의 크기를 일정 크기로 출력한다. Here, the intelligent DMB digital channel filter 100 of step S130 outputs the size of the broadcast channel signal E from which the interference signal has been removed to a predetermined size through the following process.

먼저, 지능형DMB디지털채널필터(100)는 DMB디지털필터기(110)를 통하여 저잡음분배기(30)로부터 방송채널신호(C)의 DMB 대역에 대한 방송채널신호(C)만이 필터링되도록 한다.First, the intelligent DMB digital channel filter 100 filters only the broadcast channel signal C for the DMB band of the broadcast channel signal C from the low noise distributor 30 through the DMB digital filter 110.

여기서, DMB디지털필터기(110)는 제1A/D변환기(111)를 통하여 저잡음증폭기(30)로부터 입력되는 방송채널신호(C)를 디지털 변환 처리하고, DSPDMB필터기(112)를 통하여 제1A/D변환기(111)에서 디지털 변환된 방송채널신호(C) 중 DMB 대역에 대한 방송채널신호(C)만을 필터링시킨다.Here, the DMB digital filter 110 digitally converts the broadcast channel signal C input from the low noise amplifier 30 through the first A / D converter 111 and performs the first AA through the DSPDMB filter 112. The broadcast channel signal C for the DMB band is filtered out of the broadcast channel signal C digitally converted by the / D converter 111.

이후, 지능형DMB디지털채널필터(100)는 이득제어기(120)를 통하여 DMB디지털필터기(112)로부터 출력되는 방송채널신호(C)의 이득을 제어한 후, 이때, DMB신호검출기(130)를 통하여 이득 제어시 방송채널신호(C)들에 의해 발생되는 간섭신호를 검출하도록 한다.Thereafter, the intelligent DMB digital channel filter 100 controls the gain of the broadcast channel signal C output from the DMB digital filter 112 through the gain controller 120, and then, at this time, the DMB signal detector 130 Through the gain control to detect the interference signal generated by the broadcast channel signals (C).

이후, 지능형DMB디지털채널필터(100)는 간섭신호억압기(150)를 통하여 DMB신호검출기(130)에 의해 검출된 간섭신호에 대응된 간섭신호(FN)를 생성한다.Thereafter, the intelligent DMB digital channel filter 100 generates an interference signal FN corresponding to the interference signal detected by the DMB signal detector 130 through the interference signal suppressor 150.

여기서, 간섭신호억압기(150)는 다음과 같은 과정을 통하여 간섭신호가 억제된 방송채널신호(E)를 생성한다.Here, the interference signal suppressor 150 generates a broadcast channel signal E in which the interference signal is suppressed through the following process.

먼저, 간섭신호억압기(150)는 제2A/D변환기(151)를 통하여 간섭신호(FN)를 디지털 변환 처리하여 디지털간섭신호(DFN)를 생성한다.First, the interference signal suppressor 150 digitally converts the interference signal FN through the second A / D converter 151 to generate a digital interference signal DFN.

이후, 간섭신호억압기(150)는 역위상신호발생기(152)를 통하여 제2A/D변환기(151)의 디지털간섭신호(DFN)에 대한 역위상 신호(RDFN)를 발생시킨다.Thereafter, the interference signal suppressor 150 generates an antiphase signal RDFN for the digital interference signal DFN of the second A / D converter 151 through the antiphase signal generator 152.

이후, 간섭신호억압기(150)는 DSP신호합성기(153)를 통하여 DSPDMB필터기(112)로부터 방송채널신호(C)와 역위상신호발생기(151)로부터 역위상 신호(RDFN)를 전달받아 상호간 합성하여 간섭신호의 역위상 신호가 합성된 방송채널신호(D)로 출력한다.Subsequently, the interference signal suppressor 150 receives the broadcast channel signal C from the DSPDMB filter 112 and the antiphase signal RDFN from the antiphase signal generator 151 through the DSP signal synthesizer 153. The synthesized signal is output as a synthesized broadcast channel signal (D).

이후, 간섭신호억압기(150)는 D/A변환기(154)를 통하여 DSP신호합성기(153)에 의해 생성된 간섭신호가 억압되는 방송채널신호(D)를 아날로그 신호로 변환 처리한다.Thereafter, the interference signal suppressor 150 converts the broadcast channel signal D, in which the interference signal generated by the DSP signal synthesizer 153 is suppressed, into an analog signal through the D / A converter 154.

이후, 지능형DMB디지털채널필터(100)는 이득제어기(120)를 통하여 간섭신호억압기(150)로부터 출력되는 간섭신호와 중첩신호가 억압된 방송채널신호(E)의 이득을 제어한다.Thereafter, the intelligent DMB digital channel filter 100 controls the gain of the broadcast channel signal E in which the interference signal superimposed with the interference signal output from the interference signal suppressor 150 is suppressed through the gain controller 120.

이후, 고출력증폭기(40)에 의해 지능형DMB디지털채널필터(100)로부터 전달되는 DMB 대역의 방송채널신호(E)가 높은 출력으로 증폭되며 이때, 간섭신호가 억압되어 원채널 신호만을 가지는 방송채널신호(F)가 생성된다(S140).Subsequently, the DMB band broadcast channel signal E transmitted from the intelligent DMB digital channel filter 100 is amplified to a high output by the high output amplifier 40. At this time, the interference signal is suppressed and the broadcast channel signal having only the original channel signal. (F) is generated (S140).

이후, DMB대역필터(50)에 의해 고출력증폭기(40)에서 증폭된 방송채널신호(F) 중 DMB 대역에 대한 방송채널신호(G)만이 필터링된다(S150).Thereafter, only the broadcast channel signal G for the DMB band is filtered out of the broadcast channel signal F amplified by the high power amplifier 40 by the DMB band filter 50 (S150).

이후, 송신안테나(60)를 통해 DMB대역필터(50)에 의해 필터링된 방송채널신호(G)가 송출 및 중계된다(S160).Thereafter, the broadcast channel signal G filtered by the DMB band filter 50 is transmitted and relayed through the transmission antenna 60 (S160).

이에, 상술한 바에 의하면, 전파음영지역에서 DMB 방송을 중계하는 중계장치에 있어서, DMB 중계시 동시에 인접한 2개의 방송채널들 간에 발생되는 간섭신호를 능동적으로 억압하여 원사용 채널 신호의 명료도를 향상시킬 수 있다.Therefore, as described above, in the relay apparatus for relaying DMB broadcasting in the radio shade region, it is possible to improve the intelligibility of the original channel signal by actively suppressing interference signals generated between two adjacent broadcasting channels at the same time during DMB relaying. Can be.

이상 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 설명하였지만, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자는 본 발명의 기술적 사상이나 필수적인 특징을 벗어나지 않는 범위 내에서 여러 가지로 치환, 변형 및 변경이 가능하므로 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다. 그러므로 이상에서 기술한 실시예는 모든 면에서 예시적인 것이며 한정적이 아닌 것으로 이해해야만 한다.Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may be substituted or modified in various ways without departing from the spirit or essential features of the present invention. It will be appreciated that the present invention can be practiced in other specific forms, as modifications are possible. Therefore, it is to be understood that the embodiments described above are exemplary in all respects and not restrictive.

Claims (4)

전파음영지역에 설치되는 수신안테나(10); 수신안테나(10)로부터 수신되는 방송채널신호(A) 중 DMB 대역에 대한 방송채널신호(B)만을 필터링하는 DMB대역필터(20); DMB대역필터(20)로부터 필터링된 방송채널신호(B) 중 잡음을 제거한 후 수신된 신호의 크기를 증폭시켜 증폭된 방송채널신호(C)를 생성하는 저잡음증폭기(30); 저잡음증폭기(30)에서 증폭된 방송채널신호(C) 중 동시에 인접한 2개의 방송채널신호(C)들간의 간섭신호에 대한 역위상 신호(RDFN)가 합성된 방송채널신호(D)를 RF 신호로 전환된 방송채널신호(E)로 처리한 후 일정 크기로 출력하여 고출력증폭기(40)에서 방송채널신호(E)의 증폭시 동시에 인접한 2개의 방송채널들간에 발생되는 간섭신호가 억압되도록 하는 지능형DMB디지털채널필터(100); 지능형DMB디지털채널필터(100)로부터 전달되는 방송채널신호(E)를 높은 출력으로 증폭시켜 간섭신호가 억압된 방송채널신호(F)를 생성하는 고출력증폭기(40); 고출력증폭기(40)에서 증폭된 방송채널신호(F) 중 DMB 대역에 대한 방송채널신호(G)만을 필터링하는 DMB대역필터(50); 및 DMB대역필터(50)에 의해 필터링된 방송채널신호(G)를 송출 및 중계하는 송신안테나(60)를 포함하고,
지능형DMB디지털채널필터(100)는,
저잡음증폭기(30)로부터 전달되는 방송채널신호(C)의 DMB 대역에 대한 방송채널신호(C)만이 필터링되도록 하는 DMB디지털필터기(110); DMB디지털필터기(110)에 의해 출력되는 방송채널신호(C)나 방송채널신호(C)들 사이의 간섭신호에 대한 역위상 신호(RDFN)가 합성된 방송채널신호(E)의 이득을 설정된 값으로 제어하고 고출력증폭기(40)에 전달하는 이득제어기(120); 고출력증폭기(40)로부터 출력되는 방송채널신호(C) 중 간섭신호를 검출하는 DMB신호검출기(130); 및 DMB신호검출기(130)로부터 검출된 간섭신호에 대응된 역위상 신호(RDFN)를 생성하고 방송채널신호(C)에 합성하여 고출력증폭기(40)에서 증폭시 발생되는 간섭신호가 억압되도록 하는 방송채널신호(D)를 아날로그 변환 처리하여 RF 신호로 전환된 방송채널신호(E)를 출력하여 이득제어기(120)를 통하여 고출력증폭기(40)에 출력되도록 하는 간섭신호억압기(150)를 포함하는 것을 특징으로 하는 지능형 DMB 중계장치.Receiving antenna 10 is installed in the radio shading area; A DMB band filter 20 for filtering only the broadcast channel signal B for the DMB band among the broadcast channel signals A received from the reception antenna 10; A low noise amplifier 30 for removing noise from the broadcast channel signal B filtered by the DMB band filter 20 and then amplifying the received signal to generate an amplified broadcast channel signal C; A broadcast channel signal (D) synthesized with an antiphase signal (RDFN) for an interference signal between two adjacent broadcast channel signals (C) simultaneously among the broadcast channel signals (C) amplified by the low noise amplifier (30) is an RF signal. Intelligent DMB which processes the converted broadcast channel signal E and outputs it to a certain size so that the interference signal generated between two adjacent broadcast channels is simultaneously suppressed when the high power amplifier 40 amplifies the broadcast channel signal E. Digital channel filter 100; A high output amplifier 40 which amplifies the broadcast channel signal E transmitted from the intelligent DMB digital channel filter 100 to a high output to generate a broadcast channel signal F in which interference signals are suppressed; A DMB band filter 50 for filtering only the broadcast channel signal G for the DMB band among the broadcast channel signals F amplified by the high output amplifier 40; And a transmission antenna 60 for transmitting and relaying the broadcast channel signal G filtered by the DMB band filter 50,
Intelligent DMB digital channel filter 100,
A DMB digital filter (110) for filtering only the broadcast channel signal (C) for the DMB band of the broadcast channel signal (C) transmitted from the low noise amplifier (30); The gain of the broadcast channel signal E synthesized from the broadcast channel signal C output by the DMB digital filter 110 or the antiphase signal RDFN for the interference signal between the broadcast channel signals C is set. A gain controller 120 that controls the value and delivers it to the high power amplifier 40; A DMB signal detector 130 for detecting an interference signal among the broadcast channel signals C output from the high output amplifier 40; And generating an anti-phase signal (RDFN) corresponding to the interference signal detected by the DMB signal detector 130 and synthesizing it with the broadcast channel signal (C) to suppress the interference signal generated when amplifying the high output amplifier 40. And an interference signal suppressor 150 for analog conversion of the channel signal D to output the broadcast channel signal E converted into an RF signal to be output to the high output amplifier 40 through the gain controller 120. Intelligent DMB repeater, characterized in that. 삭제delete 제1항에 있어서, DMB디지털필터기(110)는,
저잡음증폭기(30)로부터 입력되는 방송채널신호(C)를 디지털 변환 처리하는 제1A/D변환기(111)와;
제1A/D변환기(111)에서 디지털 변환된 방송채널신호(C) 중 DMB 대역에 대한 방송채널신호(C)만이 필터링되도록 하는 DSPDMB필터기(112)로 구성되는 것을 특징으로 하는 지능형 DMB 중계장치.The method of claim 1, wherein the DMB digital filter 110,
A first A / D converter 111 for digitally converting the broadcast channel signal C input from the low noise amplifier 30;
Intelligent DMB relay device comprising a DSPDMB filter 112 for filtering only the broadcast channel signal (C) for the DMB band of the broadcast channel signal (C) digitally converted by the first A / D converter 111 . 제3항에 있어서, 간섭신호억압기(150)는,
DMB신호검출기(130)로부터 궤환되는 간섭신호가 발생된 방송채널신호(C)를 디지털 변환 처리하여 디지털간섭신호(DFN)를 생성하는 제2A/D변환기(151);
제2A/D변환기(151)의 디지털간섭신호(DFN)에 대한 역위상 신호(RDFN)를 발생시키는 역위상신호발생기(152);
DSPDMB필터기(112)로부터 방송채널신호(C)와 역위상신호발생기(151)로부터 역위상 신호(RDFN)를 전달받아 상호간 합성하여 고출력증폭기(40)의 증폭시 간섭신호가 업압되는 방송채널신호(D)로 출력하는 DSP신호합성기(153); 및
DSP신호합성기(153)에 의해 생성된 간섭신호가 억압되는 방송채널신호(D)를 아날로그 변환 처리하여 RF 신호로 전환된 방송채널신호(E)를 생성하는 D/A변환기(154)를 포함하는 것을 특징으로 하는 지능형 DMB 중계장치.The method of claim 3, wherein the interference signal suppressor 150,
A second A / D converter 151 for digitally converting the broadcast channel signal C from which the interference signal fed back from the DMB signal detector 130 is generated to generate a digital interference signal DFN;
An anti-phase signal generator 152 for generating an anti-phase signal RDFN for the digital interference signal DFN of the second A / D converter 151;
The broadcast channel signal C is received from the DSPDMB filter 112 and the reverse phase signal RDFN is received from the inverse phase signal generator 151, synthesized with each other, and the interference signal is up-pressed when the high output amplifier 40 is amplified. A DSP signal synthesizer 153 for outputting to (D); And
And a D / A converter 154 for generating a broadcast channel signal E converted to an RF signal by performing analog conversion on the broadcast channel signal D on which the interference signal generated by the DSP signal synthesizer 153 is suppressed. Intelligent DMB repeater, characterized in that.
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KR100891479B1 (en) 2008-10-10 2009-04-02 주식회사 소스텔 Amplification repeater using adaptive channelizing amplifier and the method thereof
KR101492840B1 (en) 2012-02-08 2015-02-23 주식회사 소스텔 Wireless repeater for tunnel
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040097683A (en) * 2003-05-12 2004-11-18 주식회사 복스오라테크놀로지코리아 Interference cancellation system by using DSP and repeating apparatus thereof
KR100891479B1 (en) 2008-10-10 2009-04-02 주식회사 소스텔 Amplification repeater using adaptive channelizing amplifier and the method thereof
KR101492840B1 (en) 2012-02-08 2015-02-23 주식회사 소스텔 Wireless repeater for tunnel
KR20160112917A (en) * 2015-03-18 2016-09-28 블루넷테크놀러지 주식회사 Hybrid line amplifier

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