KR20020029167A - Front end unit of base station for interference signal control - Google Patents

Front end unit of base station for interference signal control Download PDF

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KR20020029167A
KR20020029167A KR1020000059972A KR20000059972A KR20020029167A KR 20020029167 A KR20020029167 A KR 20020029167A KR 1020000059972 A KR1020000059972 A KR 1020000059972A KR 20000059972 A KR20000059972 A KR 20000059972A KR 20020029167 A KR20020029167 A KR 20020029167A
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bpf
duplexer
signal
signals
channel
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KR1020000059972A
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Korean (ko)
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KR100742993B1 (en
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우동문
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박종섭
주식회사 하이닉스반도체
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0002—Modulated-carrier systems analog front ends; means for connecting modulators, demodulators or transceivers to a transmission line
    • 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
    • H04B7/15507—Relay station based processing for cell extension or control of coverage area
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Abstract

PURPOSE: An FEU(Front End Unit) system for suppressing interference signals in a base station is provided to suppress interference signals due to active and passive IMD(Inter Modulation Distortion) components by separately processing transmitting channels using a plurality of duplexers, channel BPFs(Band Pass Filters), HPAs(High Power Amplifiers), etc. CONSTITUTION: An FEU system for suppressing interference signals in a base station consists of an HPA(11), a channel BPF(12), the first duplexer(13), the second duplexer(14), the first coupler(15), the first LNA(Low Noise Amplifier)(18), the third duplexer(16), the second coupler(17), and the second LNA(19). The HPA(11) executes high power amplification for RF signals to be transmitted to mobile stations. The channel BPF(12) executes filtering for the amplified RF signals. The first duplexer(13) is composed of two TX_BPFs(4M,11M) to remove interference signals after separating the filtered RF signals by channels. The second duplexer(14) is composed of a TX_BPF(4M) to filter the RF signals passed through the TX_BPF(4M) of the first duplexer(13) and an RX_BPF(25M) to filter the RF signals received from mobile stations. The first coupler(15) couples and outputs RF signals according to transmitting/receiving paths. The first LNA(18) executes low noise amplification for the RF signals passed through the RX_BPF(25M) of the second duplexer(14). The third duplexer(16) is composed of a TX_BPF(11M) to filter the RF signals passed through the TX_BPF(11M) of the first duplexer(13) and an RX_BPF(25M) to filter the RF signals received from mobile stations. The second coupler(17) couples and outputs RF signals according to transmitting/receiving paths. The second LNA(19) executes low noise amplification for the RF signals passed through the RX_BPF(25M) of the third duplexer(16).

Description

간섭신호 억제를 위한 기지국의 프런트 앤드 유닛장치 {FRONT END UNIT OF BASE STATION FOR INTERFERENCE SIGNAL CONTROL}Front end unit device of base station for interference signal suppression {FRONT END UNIT OF BASE STATION FOR INTERFERENCE SIGNAL CONTROL}

본 발명은 간섭신호 억제를 위한 기지국의 프런트 앤드 유닛(Front End Unit; 이하, 'FEU'라 칭함)장치에 관한 것으로, 특히 다수의 듀플렉서(Duplexer), 채널 BPF(Band Pass Filter), HPA(High Power Amplifier) 등을 이용하여 송신채널을 분리 처리함으로써 송신채널 운용시 발생하는 능동적인(Active) IMD(Inter Modulation Distortion) 성분과 수동적인(Passive) IMD 성분에 의한 간섭신호를 억제할 수 있도록 한 간섭신호 억제를 위한 기지국의 FEU장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front end unit (hereinafter referred to as 'FEU') device of a base station for interference signal suppression. In particular, a plurality of duplexers, channels BPF (Band Pass Filter), and HPA (High) Interference that separates the transmission channel using Power Amplifier, etc. to suppress interference signals caused by active IMD (Inter Modulation Distortion) and passive IMD components that occur during transmission channel operation A FEU apparatus of a base station for signal suppression.

일반적으로, DCS(Digital Cellular System) 방식의 이동통신 시스템은 800MHz 대역의 주파수 대역을 사용하고 있으며, 특히 기지국은 도 1에 도시된 바와 같은 FEU장치를 구비하여 수신 경로에 따라 이동국으로부터 수신되는 RF신호를 필터링하고 저잡음 증폭하며, 송신 경로에 따라 이동국으로 송신하기 위한 RF신호를 고전력 또는 저전력 증폭하고 필터링한다.In general, the mobile communication system of the DCS (Digital Cellular System) method uses a frequency band of 800MHz band, in particular, the base station is provided with a FEU device as shown in Figure 1 RF signal received from the mobile station according to the receiving path Filter and low noise amplification, and a high power or low power amplification and filtering of the RF signal for transmission to the mobile station according to the transmission path.

즉, 도 1은 종래 기지국의 FEU장치의 블록 구성도로서, 송신 경로에 따라 이동국으로 송신하기 위한 RF신호를 고전력 증폭하는 HPA(1)와, 상기 HPA(1)에 의해 증폭된 RF신호를 해당 채널에 따라 필터링하는 채널 BPF(2)와, 상기 채널 BPF(2)를 통과한 RF신호를 송신대역에 맞게 필터링하는 TX_BPF(25M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 듀플렉서(3)와, 상기 듀플렉서(3)내 TX_BPF(25M)를 통과한 RF신호를 제1 안테나(Ant1)를 통해 이동국으로 송신하거나 제1 안테나(Ant1)를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 듀플렉서(3)내 RX_BPF(25M)로 송신하는 등, 송수신 경로에 따라 RF신호를 커플링하여 출력하는 제1 커플러(4)와, 수신 경로에 따라 상기 듀플렉서(3)내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제1 LNA(5)와, 제2안테나(Ant2)를 통해 이동국에서 송신되어 오는 RF신호를 수신하도록 커플링하는 제2 커플러(6)와, 상기 제2 커플러(6)에 의해 커플링된 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)(7)와, 상기 RX_BPF(25M)(7)를 통과한 RF신호를 저잡음 증폭하는 제2 LNA(8)로 구성된다.That is, FIG. 1 is a block diagram of a conventional FEU apparatus of a base station, which corresponds to an HPA 1 for high power amplification of an RF signal for transmission to a mobile station along a transmission path, and an RF signal amplified by the HPA 1. A channel BPF 2 for filtering according to a channel, a TX_BPF 25M for filtering an RF signal passing through the channel BPF 2 for a transmission band, and an RX_BPF for filtering an RF signal received from a mobile station according to a reception band ( 25M) and the RF signal passing through the TX_BPF (25M) in the duplexer (3) to the mobile station through the first antenna (Ant1) or transmitted from the mobile station through the first antenna (Ant1) A first coupler 4 for coupling and outputting an RF signal according to a transmission / reception path, such as receiving an incoming RF signal and transmitting it to the RX_BPF 25M in the duplexer 3, and the duplexer 3 according to the reception path First LNA for low noise amplification of RF signal passing through RX_BPF (25M) (5), a second coupler 6 for coupling to receive an RF signal transmitted from the mobile station through the second antenna Ant2, and an RF signal coupled by the second coupler 6; RX_BPF (25M) (7) for filtering according to the band, and a second LNA (8) for low noise amplification of the RF signal passing through the RX_BPF (25M) (7).

상기와 같이 구성된 종래 기지국의 FEU장치에 있어서, 송신채널 운용시 송신 경로에 따른 RF신호가 상기 HPA(1)를 통과하는 경우 HPA(1)의 고전력 증폭 동작에 의해 능동적인 IMD 성분(3rd,5th,7th order IMD)의 간섭신호가 발생한다.In the FEU apparatus of the conventional base station configured as described above, when the RF signal along the transmission path passes through the HPA (1) during operation of the transmission channel, the IMD component (3rd, 5th) is active by the high power amplification operation of the HPA (1). , 7th order IMD) interference signals are generated.

이후, 상기 채널 BPF(2)를 통과하게 되는데, 이때 간섭신호가 상기 채널 BPF(2)에 의해 어느 정도 억제되지만 다시 상기 듀플렉서(3)내 TX_BPF(25M)를 통과하면서 수동적인 IMD 성분(3rd,5th,7th order IMD)의 간섭신호가 발생하게 된다.Thereafter, the channel BPF (2) is passed, where the interference signal is suppressed to some extent by the channel BPF (2), but again passes through the TX_BPF (25M) in the duplexer (3), passive IMD component (3rd, 5th, 7th order IMD) interference signals are generated.

또한, 상기 제1 안테나(Ant1)를 거치면서 또 다시 수동적인 IMD 성분의 간섭신호가 발생하게 된다.In addition, an interference signal of a passive IMD component is generated while passing through the first antenna Ant1 again.

상기와 같은 송신채널 운용시 발생하는 간섭신호는 수신대역내에 존재함에 따라 수신신호의 품질에 악영향을 미치고, 이에 따라 전체 수신성능을 저하시키게 되는 문제점이 있었다.The interference signal generated during the operation of the transmission channel as described above exists in the reception band, which adversely affects the quality of the reception signal, thereby degrading the overall reception performance.

본 발명은 상기와 같은 문제점을 해결하기 위한 것으로서, 그 목적은 다수의 듀플렉서, 채널 BPF, HPA 등을 이용하여 송신채널을 분리 처리함으로써 송신채널 운용시 발생하는 능동적인 IMD 성분과 수동적인 IMD 성분에 의한 간섭신호를 억제할 수 있도록 한 간섭신호 억제를 위한 기지국의 FEU장치를 제공하는데 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to separate active transmission channels using multiple duplexers, channel BPFs, HPAs, etc. The present invention provides an FEU apparatus of a base station for suppressing an interference signal.

도 1은 종래 기지국의 프런트 앤드 유닛장치의 블록 구성도,1 is a block diagram of a front end unit of a conventional base station;

도 2는 본 발명의 제1 실시예에 의한 간섭신호 억제를 위한 기지국의 프런트 앤드 유닛장치의 블록 구성도,2 is a block diagram of a front end unit apparatus of a base station for interference signal suppression according to a first embodiment of the present invention;

도 3은 본 발명의 제2 실시예에 의한 간섭신호 억제를 위한 기지국의 프런트 앤드 유닛장치의 블록 구성도.3 is a block diagram of a front end unit device of a base station for interference signal suppression according to a second embodiment of the present invention;

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

11,22-1,2 : HPA, 제1,2 HPA12,23-1,2 : 채널 BPF, 채널 BPF11,22-1,2: HPA, 1st, 2 HPA12,23-1,2: Channel BPF, Channel BPF

13,21 : 제1 듀플렉서14,24 : 제2 듀플렉서13,21: first duplexer 14,24: second duplexer

15,25 : 제1 커플러16,26 : 제3 듀플렉서15,25: first coupler 16,26: third duplexer

17,27 : 제2 커플러18,28 : 제1 LNA17,27: second coupler 18,28: first LNA

19,29 : 제2 LNA19,29: 2nd LNA

상기와 같은 목적을 달성하기 위한 본 발명의 제1 실시예에 의한 간섭신호 억제를 위한 기지국의 FEU장치는, 송신 경로에 따라 이동국으로 송신하기 위한 RF신호를 고전력 증폭하는 HPA와, 상기 HPA에 의해 증폭된 RF신호를 해당 채널에 따라 필터링하는 채널 BPF와, 상기 채널 BPF를 통과한 RF신호를 채널별로 분리하여 간섭신호를 제거하기 위한 두 개의 TX_BPF(4M),TX_BPF(11M)로 이루어진 제1 듀플렉서와, 상기 제1 듀플렉서내 TX_BPF(4M)를 통과한 RF신호를 송신대역에 맞게 필터링하는 TX_BPF(4M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 제2 듀플렉서와, 상기 제2 듀플렉서내 TX_BPF(4M)를 통과한 RF신호를 제1 안테나를 통해 이동국으로 송신하거나 제1 안테나를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 제2 듀플렉서내 RX_BPF(25M)로 송신하도록 커플링 출력하는 제1 커플러와, 수신 경로에 따라 상기 제2 듀플렉서내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제1 LNA와, 상기 제1 듀플렉서내 TX_BPF(11M)를 통과한 RF신호를 송신대역에 맞게 필터링하는 TX_BPF(11M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 제3 듀플렉서와, 상기 제3 듀플렉서내 TX_BPF(11M)를 통과한 RF신호를 제2 안테나를 통해 이동국으로 송신하거나 제2 안테나를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 제3 듀플렉서내 RX_BPF(25M)로 송신하도록 커플링 출력하는 제2 커플러와, 수신 경로에 따라 상기 제3 듀플렉서내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제2 LNA로 구성되는 것을 특징으로 한다.The FEU apparatus of the base station for interference signal suppression according to the first embodiment of the present invention for achieving the above object is a HPA for high power amplification of the RF signal for transmission to the mobile station along the transmission path, by the HPA A first duplexer comprising a channel BPF for filtering the amplified RF signal according to a corresponding channel, and two TX_BPF (4M) and TX_BPF (11M) for separating interference signals by separating the RF signal passing through the channel BPF for each channel. And a second duplexer comprising a TX_BPF (4M) for filtering the RF signal passing through the TX_BPF (4M) in the first duplexer for the transmission band and an RX_BPF (25M) for filtering the RF signal received from the mobile station for the reception band. And transmitting the RF signal passing through the TX_BPF (4M) in the second duplexer to the mobile station through the first antenna or receiving the RF signal transmitted from the mobile station through the first antenna. A first coupler for coupling output to transmit to the internal RX_BPF 25M, a first LNA for low noise amplifying the RF signal passing through the RX_BPF 25M in the second duplexer, and TX_BPF in the first duplexer according to a reception path A third duplexer comprising a TX_BPF (11M) for filtering the RF signal passing through the (11M) to the transmission band and an RX_BPF (25M) for filtering the RF signal received from the mobile station to the reception band, and TX_BPF in the third duplexer Coupling and outputting the RF signal passed through the (11M) to the mobile station through the second antenna or the RF signal transmitted from the mobile station through the second antenna to transmit to the RX_BPF (25M) in the third duplexer. And a second coupler and a second LNA for low noise amplifying the RF signal passing through the RX_BPF 25M in the third duplexer according to the reception path.

본 발명의 제2 실시예에 의한 간섭신호 억제를 위한 기지국의 FEU장치는, 송신 경로에 따라 이동국으로 송신하기 위한 RF신호를 채널별로 분리하여 간섭신호를 제거하기 위한 두 개의 TX_BPF(4M),TX_BPF(11M)로 이루어진 제1 듀플렉서와, 상기 제1 듀플렉서내 TX_BPF(4M),TX_BPF(11M)를 통과한 RF 신호를 각각 고전력 증폭하는 제1,제2 HPA와, 상기 제1,제2 HPA에 의해 증폭된 RF신호를 각각 해당 채널에 따라 필터링하는 제1,제2 채널 BPF와, 상기 제1 채널 BPF를 통과한 RF신호를 송신대역에 맞게 필터링하는 TX_BPF(4M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 제2 듀플렉서와, 상기 제2 듀플렉서내 TX_BPF(4M)를 통과한 RF신호를 제1 안테나를 통해 이동국으로 송신하거나 제1 안테나를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 제2 듀플렉서내 RX_BPF(25M)로 송신하도록 커플링 출력하는 제1 커플러와, 수신 경로에 따라 상기 제2 듀플렉서내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제1 LNA와, 상기 제2 채널 BPF를 통과한 RF신호를 송신대역에 맞게 필터링하는 TX_BPF(11M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 제3 듀플렉서와, 상기 제3 듀플렉서내 TX_BPF(11M)를 통과한 RF신호를 제2 안테나를 통해 이동국으로 송신하거나 제2 안테나를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 제3 듀플렉서내 RX_BPF(25M)로 송신하도록 송수신 경로에 따라 RF신호를 커플링하여 출력하는 제2 커플러와, 수신 경로에 따라 상기 제3 듀플렉서내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제2 LNA로 구성되는 것을 특징으로 한다.The FEU apparatus of the base station for interference signal suppression according to the second embodiment of the present invention, two TX_BPF (4M), TX_BPF for removing the interference signal by separating the RF signal for transmission to the mobile station according to the transmission path by channel A first duplexer (11M), first and second HPAs for high power amplifying RF signals passing through the TX_BPF (4M) and the TX_BPF (11M) in the first duplexer, and the first and second HPAs, respectively. The first and second channel BPFs for filtering the RF signal amplified by the corresponding channel, and the TX_BPF (4M) for filtering the RF signal passing through the first channel BPF according to the transmission band and the RF signal received from the mobile station. Transmits a second duplexer consisting of RX_BPF (25M) for filtering to a reception band and an RF signal passing through TX_BPF (4M) in the second duplexer to a mobile station through a first antenna or at a mobile station through a first antenna. Receives the received RF signal A first coupler for coupling output to transmit to the RX_BPF (25M) in a second duplexer, a first LNA for low noise amplifying the RF signal passing through the RX_BPF (25M) in the second duplexer according to a receiving path, and the second A third duplexer comprising a TX_BPF (11M) for filtering the RF signal passing through the channel BPF according to the transmission band, and an RX_BPF (25M) for filtering the RF signal received from the mobile station according to the reception band, and TX_BPF (in the third duplexer); RF signal transmitted through 11M) to a mobile station through a second antenna or an RF signal transmitted from a mobile station through a second antenna to be transmitted to RX_BPF (25M) in the third duplexer according to a transmission / reception path And a second coupler for coupling and outputting a second LNA for low noise amplifying the RF signal passing through the RX_BPF 25M in the third duplexer according to a reception path.

이하, 첨부된 도면을 참고하여 본 발명에 의한 간섭신호 억제를 위한 기지국의 FEU장치의 구성 및 동작을 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the FEU device of the base station for interference signal suppression according to the present invention.

도 2는 본 발명의 제1 실시예에 의한 간섭신호 억제를 위한 기지국의 FEU장치의 블록 구성도로서, 송신 경로에 따라 이동국으로 송신하기 위한 RF신호를 고전력 증폭하는 HPA(11)와, 상기 HPA(11)에 의해 증폭된 RF신호를 해당 채널에 따라 필터링하는 채널 BPF(12)와, 상기 채널 BPF(12)를 통과한 RF신호를 채널별로 분리하여 간섭신호를 제거하기 위한 두 개의 TX_BPF(4M),TX_BPF(11M)로 이루어진 제1 듀플렉서(13)와, 상기 제1 듀플렉서(13)내 TX_BPF(4M)를 통과한 RF신호를 송신대역에 맞게 필터링하는 TX_BPF(4M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 제2 듀플렉서(14)와, 상기 제2 듀플렉서(14)내 TX_BPF(4M)를 통과한 RF신호를 제1 안테나(Ant1)를 통해 이동국으로 송신하거나 제1 안테나(Ant1)를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 제2 듀플렉서(14)내 RX_BPF(25M)로 송신하는 등, 송수신 경로에 따라 RF신호를 커플링하여 출력하는 제1 커플러(15)와, 수신 경로에 따라 상기 제2 듀플렉서(14)내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제1 LNA(18)와, 상기 제1 듀플렉서(13)내 TX_BPF(11M)를 통과한 RF신호를 송신대역에 맞게 필터링하는 TX_BPF(11M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 제3 듀플렉서(16)와, 상기 제3 듀플렉서(16)내 TX_BPF(11M)를 통과한 RF신호를 제2 안테나(Ant2)를 통해 이동국으로 송신하거나 제2 안테나(Ant2)를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 제3듀플렉서(16)내 RX_BPF(25M)로 송신하는 등, 송수신 경로에 따라 RF신호를 커플링하여 출력하는 제2 커플러(17)와, 수신 경로에 따라 상기 제3 듀플렉서(16)내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제2 LNA(19)로 구성된다.2 is a block diagram of an FEU apparatus of a base station for interference signal suppression according to a first embodiment of the present invention, which HPA 11 performs high power amplification of an RF signal for transmission to a mobile station along a transmission path, and the HPA A channel BPF 12 for filtering the RF signal amplified by 11 according to a corresponding channel, and two TX_BPFs 4M for removing interference signals by separating the RF signal passing through the channel BPF 12 for each channel. ), A first duplexer (13M) consisting of TX_BPF (11M), TX_BPF (4M) for filtering the RF signal passing through the TX_BPF (4M) in the first duplexer 13 to the transmission band and RF received from the mobile station A second duplexer (14) consisting of RX_BPF (25M) for filtering the signal according to the reception band, and the RF signal passing through the TX_BPF (4M) in the second duplexer (14) to the mobile station through the first antenna (Ant1) The number of RF signals transmitted or transmitted from the mobile station through the first antenna Ant1. A first coupler 15 for coupling and outputting an RF signal according to a transmission / reception path, for example, transmitting the signal to the RX_BPF 25M in the second duplexer 14, and the second duplexer 14 according to the reception path. The first LNA 18 for low noise amplifying the RF signal passed through the RX_BPF 25M and the TX_BPF 11M for filtering the RF signal passed through the TX_BPF 11M in the first duplexer 13 according to a transmission band. And a third duplexer 16 including an RX_BPF 25M for filtering the RF signal received from the mobile station according to a reception band, and an RF signal passing through the TX_BPF 11M in the third duplexer 16 through a second antenna ( An RF signal is transmitted according to a transmission / reception path such as an RF signal transmitted to the mobile station through Ant2) or an RF signal transmitted from the mobile station through the second antenna Ant2 and transmitted to the RX_BPF 25M in the third duplexer 16. A second coupler 17 coupled to and output, and RX_ in the third duplexer 16 according to a reception path. And a second LNA 19 for low noise amplifying the RF signal passing through the BPF 25M.

도 3은 본 발명의 제2 실시예에 의한 간섭신호 억제를 위한 기지국의 FEU장치의 블록 구성도로서, 송신 경로에 따라 이동국으로 송신하기 위한 RF신호를 채널별로 분리하여 간섭신호를 제거하기 위한 두 개의 TX_BPF(4M),TX_BPF(11M)로 이루어진 제1 듀플렉서(21)와, 상기 제1 듀플렉서(21)내 TX_BPF(4M),TX_BPF(11M)를 통과한 RF 신호를 각각 고전력 증폭하는 제1 HPA(22-1) 및 제2 HPA(22-2)와, 상기 제1 HPA(22-1) 및 제2 HPA(22-2)에 의해 증폭된 RF신호를 각각 해당 채널에 따라 필터링하는 제1 채널 BPF(23-1) 및 제2 채널 BPF(23-2)와, 상기 제1 채널 BPF(23-1)를 통과한 RF신호를 송신대역에 맞게 필터링하는 TX_BPF(4M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 제2 듀플렉서(24)와, 상기 제2 듀플렉서(24)내 TX_BPF(4M)를 통과한 RF신호를 제1 안테나(Ant1)를 통해 이동국으로 송신하거나 제1 안테나(Ant1)를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 제2 듀플렉서(24)내 RX_BPF(25M)로 송신하는 등, 송수신 경로에 따라 RF신호를 커플링하여 출력하는 제1 커플러(25)와, 수신 경로에 따라 상기 제2 듀플렉서(14)내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제1 LNA(28)와, 상기 제2 채널 BPF(23-2)를 통과한 RF신호를 송신대역에 맞게 필터링하는 TX_BPF(11M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 제3 듀플렉서(26)와, 상기 제3 듀플렉서(26)내TX_BPF(11M)를 통과한 RF신호를 제2 안테나(Ant2)를 통해 이동국으로 송신하거나 제2 안테나(Ant2)를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 제3 듀플렉서(26)내 RX_BPF(25M)로 송신하는 등, 송수신 경로에 따라 RF신호를 커플링하여 출력하는 제2 커플러(27)와, 수신 경로에 따라 상기 제3 듀플렉서(26)내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제2 LNA(28)로 구성된다.FIG. 3 is a block diagram of an FEU apparatus of a base station for suppressing interference signals according to a second embodiment of the present invention, wherein two signals for removing interference signals by separating RF signals for transmission to a mobile station according to a transmission path for each channel are shown in FIG. A first HPA for high power amplification of the first duplexer 21 including the TX_BPFs (4M) and the TX_BPFs (11M) and the RF signals passing through the TX_BPFs (4M) and the TX_BPF (11M) in the first duplexer (21), respectively. First and second filters 22-1 and 2 HPA 22-2 and RF signals amplified by the first HPA 22-1 and second HPA 22-2 according to the corresponding channel, respectively. Received from the mobile station and TX_BPF (4M) for filtering the RF signal passing through the channel BPF 23-1 and the second channel BPF 23-2, the first channel BPF 23-1 according to the transmission band. A second duplexer 24 made of RX_BPF 25M for filtering an RF signal according to a reception band, and an RF signal passing through TX_BPF 4M in the second duplexer 24 through a first antenna Ant1. Coupling the RF signal according to the transmission and reception path, such as transmitting to the mobile station or receiving the RF signal transmitted from the mobile station through the first antenna Ant1 to the RX_BPF 25M in the second duplexer 24, An output first coupler 25, a first LNA 28 for low noise amplifying the RF signal passing through the RX_BPF 25M in the second duplexer 14, and the second channel BPF 23 according to a reception path. A third duplexer 26 comprising TX_BPF 11M for filtering the RF signal passing through -2) according to the transmission band, and RX_BPF 25M for filtering the RF signal received from the mobile station according to the reception band; Transmitting the RF signal passing through the TX_BPF 11M in the duplexer 26 to the mobile station through the second antenna Ant2 or receiving the RF signal transmitted from the mobile station through the second antenna Ant2 to receive the third duplexer ( 26) Couple RF signals according to the transmission / reception paths, such as transmitting to RX_BPF (25M). And it is composed of a second coupler (27) and outputting, a second LNA (28) for low-noise amplifying the RF signal passing through the third duplexer 26 in RX_BPF (25M) in accordance with the receive path.

상기와 같이 구성된 본 발명의 간섭신호 억제를 위한 기지국의 FEU장치의 동작을 설명하면 다음과 같다.Referring to the operation of the FEU device of the base station for interference signal suppression of the present invention configured as described above are as follows.

먼저, 도 2에 도시된 제1 실시예에 의한 간섭신호 억제를 위한 기지국의 FEU장치의 동작을 설명하면, HPA(11)는 송신 경로에 따라 이동국으로 송신하기 위한 RF신호를 고전력 증폭하고, 채널 BPF(12)는 상기 HPA(11)에 의해 증폭된 RF신호를 해당 채널에 따라 필터링한다.First, when the operation of the FEU device of the base station for the interference signal suppression according to the first embodiment shown in FIG. 2 is described, the HPA 11 high-power amplifies the RF signal for transmission to the mobile station along the transmission path, The BPF 12 filters the RF signal amplified by the HPA 11 according to the corresponding channel.

이때, 상기 채널 BPF(12)의 필터링을 통해 RF신호가 상기 HPA(11)를 통과하면서 발생하는 능동적인 IMD 성분(3rd,5th,7th order IMD)의 간섭신호를 어느 정도 억제하게 된다.At this time, the filtering of the channel BPF 12 suppresses the interference signal of the active IMD components 3rd, 5th, and 7th order IMD generated while the RF signal passes through the HPA 11.

이어, 두 개의 TX_BPF(4M)와 TX_BPF(11M)로 이루어진 제1 듀플렉서(13)는 상기 채널 BPF(12)를 통과한 RF신호를 채널별로 분리하여 필터링함으로써 간섭신호를 제거한다.Subsequently, the first duplexer 13 including two TX_BPFs 4M and TX_BPFs 11M removes the interference signal by separating and filtering the RF signal passing through the channel BPF 12 for each channel.

즉, 제1 듀플렉서(13)는 수신대역내에서 간섭신호가 발생할 소지가 있는 채널들을 TX_BPF(4M)와 TX_BPF(11M)를 통해 각각 분리하여 필터링함으로써 상기 채널 BPF(12)에 의해 제거되고 남은 간섭신호와 다음 단인 제2 듀플렉서(14)와 제3 듀플렉서(16)를 통과하면서 발생될 수동적인 IMD 성분(3rd,5th,7th order IMD)의 간섭신호를 미리 제거한다.That is, the first duplexer 13 separates and filters the channels that are likely to cause interference in the reception band through the TX_BPF 4M and the TX_BPF 11M, respectively, to remove the remaining interference by the channel BPF 12. The interference signal of the passive IMD components 3rd, 5th, and 7th order IMD which will be generated while passing through the signal and the next duplexer 14 and the third duplexer 16 is removed in advance.

이후, 제2 듀플렉서(14)와 제3 듀플렉서(16)는 각각 TX_BPF(4M)와 TX_BPF(11M)를 통해 상기 제1 듀플렉서(13)내 TX_BPF(4M),TX_BPF(11M)를 통과한 잡음신호가 억제된 각각의 RF신호를 송신대역에 맞게 필터링한 후 제1,제2 커플러(15,17)를 거쳐 제1,제2 안테나(Ant1,Ant2)로 출력하여 이동국으로 송신하도록 한다.Thereafter, the second duplexer 14 and the third duplexer 16 pass through the TX_BPF 4M and the TX_BPF 11M in the first duplexer 13 through the TX_BPF 4M and the TX_BPF 11M, respectively. After filtering each of the suppressed RF signal according to the transmission band, and outputs to the first and second antennas (Ant1, Ant2) via the first and second couplers (15, 17) to transmit to the mobile station.

한편, 수신 경로의 경우에는 제1,제2 안테나(Ant1,Ant2)를 통해 이동국으로부터 수신되는 RF신호를 제1,제2 커플러(15,17)에 의해 커플링한 다음 각각 제2,제3 듀플렉서(14,16)로 출력한다.On the other hand, in the case of the reception path, RF signals received from the mobile station through the first and second antennas Ant1 and Ant2 are coupled by the first and second couplers 15 and 17, respectively, and then second and third, respectively. Output to duplexers 14 and 16.

이어, 제2 듀플렉서(14)와 제3 듀플렉서(16)는 각각 RX_BPF(25M)와 RX_BPF(25M)를 통해 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하여 제1,제2 LNA(18,19)로 출력한다.Subsequently, the second duplexer 14 and the third duplexer 16 filter the RF signals received from the mobile station through the RX_BPF 25M and the RX_BPF 25M, respectively, according to the reception bands, so that the first and second LNAs 18, 19)

그러면, 제1,제2 LNA(18,19)는 상기 제2 듀플렉서(14)내 RX_BPF(25M)와 제3 듀플렉서(16)내 RX_BPF(25M)를 통과한 RF신호를 각각 저잡음 증폭한다.Then, the first and second LNAs 18 and 19 low noise amplify RF signals passing through the RX_BPF 25M in the second duplexer 14 and the RX_BPF 25M in the third duplexer 16, respectively.

다음으로, 도 3에 도시된 제2 실시예에 의한 간섭신호 억제를 위한 기지국의 FEU장치의 동작을 설명하면, 두 개의 TX_BPF(4M)와 TX_BPF(11M)로 이루어진 제1 듀플렉서(21)는 송신 경로에 따라 이동국으로 송신하기 위한 RF신호를 채널별로 분리하여 필터링함으로써 간섭신호를 제거한다.Next, referring to the operation of the FEU device of the base station for interference signal suppression according to the second embodiment shown in Figure 3, the first duplexer 21 consisting of two TX_BPF (4M) and TX_BPF (11M) is transmitted The RF signal for transmission to the mobile station along the path is separated and filtered for each channel to remove the interference signal.

즉, 제1 듀플렉서(21)는 수신대역내에서 간섭신호가 발생할 소지가 있는 채널들을 TX_BPF(4M)와 TX_BPF(11M)를 통해 각각 분리하여 필터링함으로써 다음 단인 제1,제2 HPA(22-1,2)를 통과하면서 발생될 능동적인 IMD 성분(3rd,5th,7th order IMD)의 간섭신호를 미리 제거한다.That is, the first duplexer 21 separates and filters channels that may cause interference in the reception band through the TX_BPF 4M and the TX_BPF 11M, respectively, so that the first and second HPAs 22-1 are the next stages. The interference signals of the active IMD components (3rd, 5th, 7th order IMD) to be generated while passing through 2 are removed in advance.

이와 더불어 제1,제2 채널 BPF(23-1,2)를 통과한 후에 다음 단인 제2 듀플렉서(24)와 제3 듀플렉서(26)를 통과하면서 발생될 수동적인 IMD 성분(3rd,5th,7th order IMD)의 간섭신호도 미리 제거한다.In addition, after passing through the first and second channel BPFs 23-1 and 2, the passive IMD components 3rd, 5th, and 7th to be generated while passing through the second and second duplexers 24 and 26. The interference signal of order IMD) is also removed in advance.

이어, 제1 HPA(22-1) 및 제2 HPA(22-2)는 상기 제1 듀플렉서(21)내 TX_BPF(4M)와 TX_BPF(11M)를 통과한 RF 신호를 각각 고전력 증폭하고, 제1 채널 BPF(23-1) 및 제2 채널 BPF(23-2)는 상기 제1 HPA(22-1) 및 제2 HPA(22-2)에 의해 증폭된 RF신호를 각각 해당 채널에 따라 필터링한다.Subsequently, the first HPA 22-1 and the second HPA 22-2 high power amplify RF signals passing through the TX_BPF 4M and the TX_BPF 11M in the first duplexer 21, respectively, The channel BPF 23-1 and the second channel BPF 23-2 filter the RF signals amplified by the first HPA 22-1 and the second HPA 22-2 according to the corresponding channel, respectively. .

이후, 제2 듀플렉서(24)와 제3 듀플렉서(26)는 각각 TX_BPF(4M)와 TX_BPF(11M)를 통해 상기 제1,제2 채널 BPF(23-1,2)를 통과한 잡음신호가 억제된 각각의 RF신호를 송신대역에 맞게 필터링한 후 제1,제2 커플러(25,27)를 거쳐 제1,제2 안테나(Ant1,Ant2)로 출력하여 이동국으로 송신하도록 한다.Thereafter, the second duplexer 24 and the third duplexer 26 suppress the noise signals passing through the first and second channel BPFs 23-1 and 2 through TX_BPF 4M and TX_BPF 11M, respectively. Each RF signal is filtered according to the transmission band, and then output to the first and second antennas Ant1 and Ant2 through the first and second couplers 25 and 27 to be transmitted to the mobile station.

한편, 수신 경로의 경우에는 제1,제2 안테나(Ant1,Ant2)를 통해 이동국으로부터 수신되는 RF신호를 제1,제2 커플러(25,27)에 의해 커플링한 다음 각각 제2,제3 듀플렉서(24,26)로 출력한다.On the other hand, in the case of the reception path, RF signals received from the mobile station through the first and second antennas Ant1 and Ant2 are coupled by the first and second couplers 25 and 27, respectively, and then second and third, respectively. Output to duplexers 24 and 26.

이어, 제2 듀플렉서(24)와 제3 듀플렉서(26)는 각각 RX_BPF(25M)와 RX_BPF(25M)를 통해 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하여 제1,제2 LNA(28,29)로 출력한다.Subsequently, the second duplexer 24 and the third duplexer 26 filter the RF signals received from the mobile station through the RX_BPF 25M and the RX_BPF 25M, respectively, according to the reception bands, so that the first and second LNAs 28, 29).

그러면, 제1,제2 LNA(28,29)는 상기 제2 듀플렉서(24)내 RX_BPF(25M)와 제3 듀플렉서(26)내 RX_BPF(25M)를 통과한 RF신호를 각각 저잡음 증폭한다.Then, the first and second LNAs 28 and 29 low noise amplify RF signals passing through the RX_BPF 25M in the second duplexer 24 and the RX_BPF 25M in the third duplexer 26, respectively.

상기와 같이 본 발명에서는 채널간 IMD 성분의 간섭신호가 발생할 수 있는 채널을 송신 처리하는 경우 각각의 채널을 서로 분리하여 증폭 처리함으로써 수신대역내에 존재하여 수신성능에 영향을 미치는 IMD 성분의 간섭신호를 미리 억제시키도록 하고 있다.As described above, in the present invention, when transmitting a channel capable of generating an interference signal of an IMD component between channels, each channel is separated from each other and amplified so that an interference signal of an IMD component that exists in a reception band and affects reception performance is transmitted. It is supposed to be suppressed in advance.

상기에서 설명한 바와 같이, 다수의 듀플렉서, 채널 BPF, HPA 등을 이용하여 송신채널을 분리 처리함으로써 송신채널 운용시 발생하는 능동적인 IMD 성분과 수동적인 IMD 성분에 의한 간섭신호를 억제할 수 있어 수신성능을 향상시킬 수 있게 되는 효과가 있다.As described above, by separating the transmission channel using a plurality of duplexers, channel BPF, HPA, etc., it is possible to suppress the interference signal caused by the active IMD component and the passive IMD component generated during transmission channel operation. There is an effect that can be improved.

Claims (2)

HPA에 의해 증폭된 RF신호를 해당 채널에 따라 필터링하는 채널 BPF와,A channel BPF for filtering the RF signal amplified by the HPA according to the corresponding channel; 상기 채널 BPF를 통과한 RF신호를 채널별로 분리하여 간섭신호를 제거하기 위한 두 개의 TX_BPF(4M),TX_BPF(11M)로 이루어진 제1 듀플렉서와,A first duplexer comprising two TX_BPFs (4M) and TX_BPFs (11M) for separating interference signals by separating the RF signals passing through the channel BPF for each channel; 상기 제1 듀플렉서내 TX_BPF(4M)를 통과한 RF신호를 송신대역에 맞게 필터링하는 TX_BPF(4M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 제2 듀플렉서와,A second duplexer comprising a TX_BPF (4M) for filtering the RF signal passing through the TX_BPF (4M) in the first duplexer according to the transmission band and an RX_BPF (25M) for filtering the RF signal received from the mobile station according to the reception band; 상기 제2 듀플렉서내 TX_BPF(4M)를 통과한 RF신호를 제1 안테나를 통해 이동국으로 송신하거나 제1 안테나를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 제2 듀플렉서내 RX_BPF(25M)로 송신하도록 커플링 출력하는 제1 커플러와,The RF signal passing through the TX_BPF (4M) in the second duplexer is transmitted to the mobile station through the first antenna or the RF signal transmitted from the mobile station through the first antenna is transmitted to the RX_BPF (25M) in the second duplexer. A first coupler for coupling output to 수신 경로에 따라 상기 제2 듀플렉서내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제1 LNA와,A first LNA for low noise amplifying the RF signal passing through the RX_BPF (25M) in the second duplexer according to a reception path; 상기 제1 듀플렉서내 TX_BPF(11M)를 통과한 RF신호를 송신대역에 맞게 필터링하는 TX_BPF(11M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 제3 듀플렉서와,A third duplexer including a TX_BPF (11M) for filtering the RF signal passing through the TX_BPF (11M) in the first duplexer according to the transmission band and an RX_BPF (25M) for filtering the RF signal received from the mobile station according to the reception band; 상기 제3 듀플렉서내 TX_BPF(11M)를 통과한 RF신호를 제2 안테나를 통해 이동국으로 송신하거나 제2 안테나를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 제3 듀플렉서내 RX_BPF(25M)로 송신하도록 커플링 출력하는 제2 커플러와,The RF signal passing through the TX_BPF (11M) in the third duplexer is transmitted to the mobile station through the second antenna or the RF signal transmitted from the mobile station through the second antenna is received and transmitted to the RX_BPF (25M) in the third duplexer. A second coupler for coupling output to 수신 경로에 따라 상기 제3 듀플렉서내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제2 LNA로 구성되는 것을 특징으로 하는 간섭신호 억제를 위한 기지국의 프런트 앤드 유닛장치.And a second LNA for low noise amplifying the RF signal passing through the RX_BPF (25M) in the third duplexer according to a reception path. 송신 경로에 따라 이동국으로 송신하기 위한 RF신호를 채널별로 분리하여 간섭신호를 제거하기 위한 두 개의 TX_BPF(4M),TX_BPF(11M)로 이루어진 제1 듀플렉서와,A first duplexer comprising two TX_BPFs (4M) and TX_BPFs (11M) for separating interference signals by channel-by-channel RF signals for transmission to a mobile station according to a transmission path; 상기 제1 듀플렉서내 TX_BPF(4M),TX_BPF(11M)를 통과한 RF 신호를 각각 고전력 증폭하는 제1,제2 HPA와,First and second HPAs for high power amplifying RF signals passing through the TX_BPF (4M) and the TX_BPF (11M) in the first duplexer, respectively; 상기 제1,제2 HPA에 의해 증폭된 RF신호를 각각 해당 채널에 따라 필터링하는 제1,제2 채널 BPF와,First and second channel BPFs for filtering the RF signals amplified by the first and second HPAs according to respective channels; 상기 제1 채널 BPF를 통과한 RF신호를 송신대역에 맞게 필터링하는 TX_BPF(4M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 제2 듀플렉서와,A second duplexer comprising a TX_BPF (4M) for filtering the RF signal passing through the first channel BPF according to a transmission band and an RX_BPF (25M) for filtering the RF signal received from a mobile station according to a reception band; 상기 제2 듀플렉서내 TX_BPF(4M)를 통과한 RF신호를 제1 안테나를 통해 이동국으로 송신하거나 제1 안테나를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 제2 듀플렉서내 RX_BPF(25M)로 송신하도록 커플링 출력하는 제1 커플러와,The RF signal passing through the TX_BPF (4M) in the second duplexer is transmitted to the mobile station through the first antenna or the RF signal transmitted from the mobile station through the first antenna is transmitted to the RX_BPF (25M) in the second duplexer. A first coupler for coupling output to 수신 경로에 따라 상기 제2 듀플렉서내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제1 LNA와,A first LNA for low noise amplifying the RF signal passing through the RX_BPF (25M) in the second duplexer according to a reception path; 상기 제2 채널 BPF를 통과한 RF신호를 송신대역에 맞게 필터링하는TX_BPF(11M)와 이동국으로부터 수신되는 RF신호를 수신대역에 맞게 필터링하는 RX_BPF(25M)로 이루어진 제3 듀플렉서와,A third duplexer comprising a TX_BPF (11M) for filtering the RF signal passing through the second channel BPF according to the transmission band and an RX_BPF (25M) for filtering the RF signal received from the mobile station according to the reception band; 상기 제3 듀플렉서내 TX_BPF(11M)를 통과한 RF신호를 제2 안테나를 통해 이동국으로 송신하거나 제2 안테나를 통해 이동국에서 송신되어 오는 RF신호를 수신하여 상기 제3 듀플렉서내 RX_BPF(25M)로 송신하도록 송수신 경로에 따라 RF신호를 커플링하여 출력하는 제2 커플러와,The RF signal passing through the TX_BPF (11M) in the third duplexer is transmitted to the mobile station through the second antenna or the RF signal transmitted from the mobile station through the second antenna is received and transmitted to the RX_BPF (25M) in the third duplexer. A second coupler for coupling and outputting an RF signal according to a transmission / reception path so as to 수신 경로에 따라 상기 제3 듀플렉서내 RX_BPF(25M)를 통과한 RF신호를 저잡음 증폭하는 제2 LNA로 구성되는 것을 특징으로 하는 간섭신호 억제를 위한 기지국의 프런트 앤드 유닛장치.And a second LNA for low noise amplifying the RF signal passing through the RX_BPF (25M) in the third duplexer according to a reception path.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040032428A (en) * 2002-10-09 2004-04-17 모네타인포컴주식회사 The Equipment for Wireless Repeater System of Oscillation Suppression at CDMA
KR100964748B1 (en) * 2008-05-02 2010-06-21 장세주 Interference surpress system front end of base station
KR20170098687A (en) * 2016-02-22 2017-08-30 가부시키가이샤 무라타 세이사쿠쇼 Diplexer module with switch and diplexer module

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040032428A (en) * 2002-10-09 2004-04-17 모네타인포컴주식회사 The Equipment for Wireless Repeater System of Oscillation Suppression at CDMA
KR100964748B1 (en) * 2008-05-02 2010-06-21 장세주 Interference surpress system front end of base station
KR20170098687A (en) * 2016-02-22 2017-08-30 가부시키가이샤 무라타 세이사쿠쇼 Diplexer module with switch and diplexer module

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