KR20100102349A - Radio frequency communication device and method of cotrolling the same - Google Patents

Radio frequency communication device and method of cotrolling the same Download PDF

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KR20100102349A
KR20100102349A KR1020090020681A KR20090020681A KR20100102349A KR 20100102349 A KR20100102349 A KR 20100102349A KR 1020090020681 A KR1020090020681 A KR 1020090020681A KR 20090020681 A KR20090020681 A KR 20090020681A KR 20100102349 A KR20100102349 A KR 20100102349A
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antenna
switch
received signal
rssi
receiving end
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KR1020090020681A
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KR101628359B1 (en
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박용태
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엘지이노텍 주식회사
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    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

PURPOSE: An RF(Radio Frequency) communication device and a method for controlling the same are provided to secure stable reception performance when entering a strong electric field. CONSTITUTION: A transmission terminal processes a transmission signal transmitted to an antenna, and a reception terminal processes a reception signal received to the antenna. An RF switch(30) selectively connects the antenna to the transmission terminal and the reception terminal. If the RSSI is lower than a reference value, the control unit controls the RF switch to connect the antenna to the reception terminal.

Description

ＲＦ 통신장치 및 제어방법{RADIO FREQUENCY COMMUNICATION DEVICE AND METHOD OF COTROLLING THE SAME}RF communication device and control method {RADIO FREQUENCY COMMUNICATION DEVICE AND METHOD OF COTROLLING THE SAME}

실시예는 RF 통신장치 및 그 제어방법에 관한 것이다.An embodiment relates to an RF communication apparatus and a control method thereof.

이동통신, 근거리 통신, 데이터 통신 등 다양한 무선통신 기술이 개발됨에 따라, 사회 각 분야에서 무선통신 시스템이 사용되고 있다. 무선통신 시스템은 상호 약속된 채널을 통해 음성, 영상, 멀티미디어 데이터 등을 정해진 규격에 따라 무선 송수신한다. 이에, 무선신호를 송수신하는 RF 통신장치는 무선통신 기능을 수행하기 위한 가장 기본적인 구성으로서, 그 성능 향상을 위한 연구가 계속되고 있다.As various wireless communication technologies such as mobile communication, local area communication, and data communication have been developed, wireless communication systems are being used in various fields of society. The wireless communication system wirelessly transmits and receives audio, video, multimedia data, etc. according to a predetermined standard through mutually agreed channels. Accordingly, an RF communication apparatus for transmitting and receiving a radio signal is the most basic configuration for performing a radio communication function, and research for improving its performance is continuing.

RF 통신장치 중, Wi-Fi 등과 같이 고출력 신호를 요구하는 RF 통신장치의 경우, 주변의 전파환경의 변화에 민감하게 반응하여 송수신 성능이 저하될 수 있다. Among RF communication devices, in case of an RF communication device requiring a high output signal such as Wi-Fi, transmission / reception performance may be degraded in response to changes in the surrounding radio wave environment.

특히, 수신신호강도가 지나치게 강한, 기지국 인접 지역이나, 액세스 포인트(Access Point)의 인접 지역에서는 수신성능이 저하될 수 있으며, 심한 경우 통신 칩이 손상될 수 있다.In particular, the reception performance may be degraded in an area adjacent to a base station or an area adjacent to an access point, where the reception signal strength is too strong, and in severe cases, the communication chip may be damaged.

실시예는 간단한 구성으로, 강전계 진입 시에도 안정적인 수신성능을 보장할 수 있는 RF 통신장치 및 그 제어방법을 제공한다.The embodiment has a simple configuration and provides an RF communication apparatus and a control method thereof which can ensure stable reception performance even when entering a strong electric field.

실시예에 의한 RF 통신장치는, 송수신 안테나와; 상기 안테나로 송신되는 송신신호 처리를 위한 송신단과; 상기 안테나로 수신된 수신신호를 처리하는 수신단과; 상기 안테나와 상기 송신단 및 수신단을 선택적으로 연결하는 RF 스위치와; 상기 안테나로 수신된 수신신호의 RSSI(Received Signal Strength Indication)가 기준값보다 큰 경우, 상기 안테나 및 상기 송신단이 연결되도록 상기 RF 스위치를 제어하고, 상기 수신단으로 입력되는 신호를 처리하는 제어부를 포함한다.An RF communication apparatus according to an embodiment includes a transmitting and receiving antenna; A transmitter for processing a transmission signal transmitted to the antenna; A receiving end for processing the received signal received by the antenna; An RF switch for selectively connecting the antenna with the transmitting end and the receiving end; And a control unit for controlling the RF switch to connect the antenna and the transmitting end and processing a signal input to the receiving end when the RSSI (Received Signal Strength Indication) of the received signal received by the antenna is larger than a reference value.

실시예에 의한 RF 통신장치의 제어방법은, 안테나로 수신된 수신신호의 RSSI(Received Signal Strength Indication)를 측정하여, 소정 기준값과 비교하는 단계; 상기 수신신호의 RSSI가 상기 기준값보다 큰 경우, 상기 안테나가 송신단과 연결되도록 RF 스위치를 제어하는 단계; 상기 안테나가 연결되지 아니한 수신단으로 입력되는 수신신호를 처리하는 단계를 포함한다.In another embodiment, a control method of an RF communication apparatus includes measuring a received signal strength indication (RSSI) of a received signal received by an antenna and comparing the received signal strength with a predetermined reference value; If the RSSI of the received signal is larger than the reference value, controlling the RF switch so that the antenna is connected to a transmitting end; And processing a received signal input to a receiving end to which the antenna is not connected.

실시예에 의하면, 강전계 진입 시에도 안정적인 수신성능을 보장할 수 있는 RF 통신장치 및 그 제어방법을 제공할 수 있다.According to the embodiment, it is possible to provide an RF communication apparatus and a control method thereof capable of ensuring stable reception performance even when entering a strong electric field.

이하에서는 첨부한 도면을 참조하여 본 발명의 실시예에 따른 RF 통신장치 및 그 제어방법에 대해서 상세하게 설명한다. 다만, 본 발명을 설명함에 있어, 관련된 공지 기능 혹은 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우 그에 대한 상세한 설명은 생략한다.Hereinafter, an RF communication apparatus and a control method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

도 1은 본 발명에 따른 RF 통신장치의 제어블록도이다.1 is a control block diagram of an RF communication apparatus according to the present invention.

도 1에 도시된 바와 같이, RF 통신장치는, 무선신호의 송수신을 위한 안테나(ANT)와, 안테나(ANT)를 송신단 및 수신단 중 어느 한 쪽과 연결하는 RF 스위치(30)와, 송수신 신호를 처리하는 통신 제어부(10)를 포함한다.As shown in FIG. 1, the RF communication apparatus includes an antenna ANT for transmitting and receiving a radio signal, an RF switch 30 for connecting the antenna ANT to one of a transmitting end and a receiving end, and a transmitting and receiving signal. And a communication control unit 10 for processing.

수신단은 수신신호의 증폭을 위한 증폭기(70, 80) 등을 포함하여 처리된 수신신호를 통신 제어부(10)로 제공한다. The receiving end provides the processed receiving signal to the communication controller 10 including the amplifiers 70 and 80 for amplifying the receiving signal.

송신단은 통신 제어부(10)가 출력한 송신신호를 증폭하는 제1증폭기(50) 및 제2증폭기(60)와, 증폭된 송신신호를 안정화하는 출력매칭회로(40)를 포함한다. 여기서, 제2증폭기(50)는 최종 증폭된 송신신호의 출력값을 감지하여 RF출력값 전달회로(20)로 제공한다. The transmitter includes a first amplifier 50 and a second amplifier 60 for amplifying the transmission signal output from the communication control unit 10, and an output matching circuit 40 for stabilizing the amplified transmission signal. Here, the second amplifier 50 senses the output value of the final amplified transmission signal and provides it to the RF output value transfer circuit 20.

출력감지값 전달부(20)는 제2증폭기(50)가 전달하는 최종 증폭된 송신신호의 출력값을 통신 제어부(10)가 처리 가능한 데이터로 변환하여 통신 제어부(10)에 전달한다. 이에, 통신 제어부(10)는 출력감지값 전달부(20)가 제공하는 송신신호의 출력값에 따라 제1증폭기(60)로 출력하는 송신신호의 게인을 조절함으로써, RF 출력을 무선통신을 위한 기준출력으로 유지한다. The output detection value transmission unit 20 converts the output value of the final amplified transmission signal transmitted by the second amplifier 50 into data that the communication control unit 10 can process and transmits it to the communication control unit 10. Therefore, the communication control unit 10 adjusts the gain of the transmission signal output to the first amplifier 60 according to the output value of the transmission signal provided by the output detection value transmission unit 20, thereby the RF output reference for wireless communication Keep it as an output.

RF 스위치(30)는 안테나 접점(a)을 수신단 접점(b) 및 송신단 접점(c)에 선 택적으로 연결한다. RF 스위치(30)는 SPDT(Single Pole Double Throw)의 고 대역폭 릴레이를 이용하거나, RF 경로를 구성하는 전송선로의 중간에 트랜지스터를 연결하는 등, 다양한 형태로 구성이 가능하다. 이러한, RF 스위치(30)는 RF 경로를 연결(Connection) 또는 아이소레이션(Isolation)시키는데, RF는 공간에 전파되는 특성이 있기 때문에 아이소레이션 정도는 설계 방법에 따라 조절될 수 있다. 즉, RF 스위치(30)의 아이소레이션 정도에 따라, RF 경로가 연결되지 아니한 측에도 수신신호는 전달될 수 있으며, RF 경로가 연결되지 아니한 측에 전달되는 수신신호는 본래의 신호보다는 신호세기가 감쇄된 신호가 전달된다.The RF switch 30 selectively connects the antenna contact a to the receiving end contact b and the transmitting end contact c. The RF switch 30 may be configured in various forms, such as using a high bandwidth relay of a single pole double throw (SPDT) or connecting a transistor in the middle of a transmission line constituting the RF path. The RF switch 30 connects or isolates the RF path. Since the RF has a propagation property in the space, the degree of isolation may be adjusted according to a design method. That is, according to the degree of isolation of the RF switch 30, the received signal can be transmitted to the side where the RF path is not connected, and the received signal transmitted to the side where the RF path is not connected is attenuated by the signal strength rather than the original signal. Signal is transmitted.

송신기능 수행 시, 통신 제어부(10)는 송신단과 안테나(ANT)가 연결되도록 RF 스위치(30)를 제어한다. When performing the transmission function, the communication control unit 10 controls the RF switch 30 to be connected to the transmitting end and the antenna (ANT).

수신기능 수행 시, 통신 제어부(10)는 수신단과 안테나(ANT)가 연결되도록 RF 스위치(30)를 제어한다. 여기서, 통신 제어부(10)는 수신신호의 RSSI(Received Signal Strength Indication)를 측정하여 RSSI가 기준값보다 큰지 여부를 판단한다. 통신 제어부(10)는 RSSI가 기준값 이상으로 현재 통신환경이 강전계 환경인 것으로 판단되면, 현재, 수신기능을 수행하고 있지만 송신단이 안테나(ANT)와 연결되도록 RF 스위치(30)를 제어한다. 강전계 상태에서는 RF 스위치(30)가 안테나(ANT)와 송신단 간 경로를 설정하고 있는 상태에서도, 수신단 측으로 수신신호가 유입된다. 이에, RSSI가 기준값보다 큰 수신신호는 RF 스위치(30)의 아이소레이션 기능에 의해 RSSI가 감쇄된 후 수신단에서 처리될 수 있다.When performing the reception function, the communication control unit 10 controls the RF switch 30 so that the receiving end and the antenna ANT are connected. Here, the communication control unit 10 measures the received signal strength indication (RSSI) of the received signal to determine whether the RSSI is greater than the reference value. If it is determined that the current communication environment is a strong electric field environment with the RSSI equal to or greater than the reference value, the communication control unit 10 controls the RF switch 30 so that the transmitting end is connected to the antenna ANT. In the strong electric field state, even when the RF switch 30 sets the path between the antenna ANT and the transmitting end, the receiving signal flows into the receiving end. Accordingly, the received signal having the RSSI larger than the reference value may be processed at the receiving end after the RSSI is attenuated by the isolation function of the RF switch 30.

이러한 구성에 의해, 본 발명에 따른 RF 통신장치는, 수신기능 수행 시 RSSI 값이 기준값 보다 작은 경우 수신단과 안테나(ANT)가 연결되도록 RF 스위치(30)를 제어한다. 반면, RSSI값이 기준값 보다 큰 경우, RF 스위치(30)가 송신단 혹은 다른 접점과 연결되도록 하고, RF 스위치(30)을 신호 감쇄기로 활용하여 수신단으로 입력된 수신신호를 처리한다.By such a configuration, the RF communication apparatus according to the present invention controls the RF switch 30 so that the receiving end and the antenna ANT are connected when the RSSI value is smaller than the reference value when the receiving function is performed. On the other hand, when the RSSI value is larger than the reference value, the RF switch 30 is connected to the transmitting end or another contact point, and the RF switch 30 is used as a signal attenuator to process the received signal input to the receiving end.

도 2는 본 발명에 따른 RF 통신장치의 제어방법의 흐름도이다.2 is a flowchart of a control method of an RF communication apparatus according to the present invention.

RF 통신장치의 통신 제어부(10)는, 수신기능 수행을 위해 RF 스위치(30)의 경로를 수신단 측으로 설정한다(S10).The communication control unit 10 of the RF communication apparatus sets the path of the RF switch 30 to the receiving end side in order to perform the receiving function (S10).

통신 제어부(10)는 수신신호의 RSSI를 측정하고(S12), 측정된 RSSI가 기준값보다 큰지 여부를 판단한다(S14). 여기서, 기준값은 RF 통신장치에서 정상적으로 처리할 수 있는 RSSI의 최대값으로 설정될 수 있다.The communication control unit 10 measures the RSSI of the received signal (S12), and determines whether the measured RSSI is larger than the reference value (S14). Here, the reference value may be set to the maximum value of the RSSI that can be normally processed by the RF communication device.

판단결과, RSSI가 기준값보다 큰 경우, 통신 제어부(10)는 RF 스위치(30)의 경로를 송신단 측으로 재설정한다(S16). 여기서, 별도의 접점을 마련해둔 경우, RF 스위치(30)의 경로를 해당 접점으로 연결되도록 하는 것도 가능하다.As a result of the determination, when the RSSI is larger than the reference value, the communication control unit 10 resets the path of the RF switch 30 to the transmitting end (S16). Here, when a separate contact is provided, it is also possible to connect the path of the RF switch 30 to the corresponding contact.

RF 스위치(30)의 경로를 재설정 하면, RF 스위치(30)는 신호 감쇄기의 기능을 수행할 수 있으며, 이에, 통신 제어부(10)는 안테나(ANT)를 통해 수신단으로 입력되는 감쇄된 수신신호를 처리한다(S18). 한편, S14단계에서 RSSI가 기준값보다 작은 것으로 판단된 경우, 통신 제어부(10)는 RF 스위치(30)의 연결상태를 유지하고 수신단으로 입력되는 수신신호를 처리한다.When the path of the RF switch 30 is reset, the RF switch 30 may perform a function of a signal attenuator. Accordingly, the communication control unit 10 may receive the attenuated received signal input to the receiver through the antenna ANT. Process (S18). On the other hand, if it is determined in step S14 that the RSSI is smaller than the reference value, the communication control unit 10 maintains the connection state of the RF switch 30 and processes the received signal input to the receiving end.

이상에서 대표적인 실시예를 통하여 본 발명에 대하여 상세하게 설명하였으나, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자는 상술한 실시예에 대 하여 본 발명의 범주에서 벗어나지 않는 한도 내에서 다양한 변형이 가능함을 이해할 것이다. 그러므로 본 발명의 권리범위는 설명된 실시예에 국한되어 정해져서는 안되며 후술하는 특허청구범위뿐만 아니라 이 특허청구범위와 균등한 것들에 의해 정해져야 한다.Although the present invention has been described in detail with reference to exemplary embodiments above, those skilled in the art may make various modifications within the scope of the present invention without departing from the scope of the present invention. Will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

도 1은 실시예에 따른 RF 통신장치의 제어블럭도.1 is a control block diagram of an RF communication apparatus according to an embodiment.

도 2는 실시예에 따른 RF 통신장치의 제어흐름도.2 is a control flowchart of an RF communication apparatus according to an embodiment.

Claims (4)

송수신 안테나와;A transceiver antenna; 상기 안테나로 송신되는 송신신호 처리를 위한 송신단과;A transmitter for processing a transmission signal transmitted to the antenna; 상기 안테나로 수신된 수신신호를 처리하는 수신단과;A receiving end for processing the received signal received by the antenna; 상기 안테나와 상기 송신단 및 수신단을 선택적으로 연결하는 RF 스위치와;An RF switch for selectively connecting the antenna with the transmitting end and the receiving end; 상기 안테나로 수신된 수신신호의 RSSI(Received Signal Strength Indication)가 기준값보다 큰 경우, 상기 안테나 및 상기 송신단이 연결되도록 상기 RF 스위치를 제어하고, 상기 수신단으로 입력되는 신호를 처리하는 제어부를 포함하는 RF 통신장치.If the received signal strength indication (RSSI) of the received signal received by the antenna is greater than the reference value, the RF control unit for controlling the RF switch so that the antenna and the transmitting end is connected, and including a control unit for processing a signal input to the receiving end Communication device. 제1항에 있어서,The method of claim 1, 상기 제어부는,The control unit, 상기 RSSI가 상기 기준값보다 작은 경우, 상기 안테나 및 상기 수신단이 연결되도록 상기 RF 스위치를 제어하고, 상기 수신단으로 입력되는 신호를 처리하는 통신 제어부를 포함하는 RF 통신장치.And a communication control unit for controlling the RF switch so that the antenna and the receiving end are connected when the RSSI is smaller than the reference value, and processing a signal input to the receiving end. 안테나로 수신된 수신신호의 RSSI(Received Signal Strength Indication)를 측정하여, 소정 기준값과 비교하는 단계;Measuring RSSI (Received Signal Strength Indication) of the received signal received by the antenna and comparing it with a predetermined reference value; 상기 수신신호의 RSSI가 상기 기준값보다 큰 경우, 상기 안테나가 송신단과 연결되도록 RF 스위치를 제어하는 단계;If the RSSI of the received signal is larger than the reference value, controlling the RF switch so that the antenna is connected to a transmitting end; 상기 안테나가 연결되지 아니한 수신단으로 입력되는 수신신호를 처리하는 단계를 포함하는 RF 통신장치의 제어방법.And controlling a received signal input to a receiving end not connected to the antenna. 제3항에 있어서,The method of claim 3, 상기 수신신호의 RSSI가 상기 기준값보다 작은 경우, 상기 안테나가 상기 수신단과 연결되도록 상기 RF 스위치를 제어하는 단계;Controlling the RF switch so that the antenna is connected to the receiving end when the RSSI of the received signal is smaller than the reference value; 상기 안테나가 연결된 수신단으로 입력되는 수신신호를 처리하는 단계를 포함하는 RF 통신장치의 제어방법.And controlling the received signal input to the receiving end to which the antenna is connected.
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JPH06140959A (en) * 1992-10-22 1994-05-20 Kokusai Electric Co Ltd Radio transmitter-receiver
JP2002319876A (en) * 2001-04-19 2002-10-31 Hitachi Kokusai Electric Inc Mobile station wireless equipment
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107623526A (en) * 2017-08-24 2018-01-23 深圳市盛路物联通讯技术有限公司 A kind of method and communication terminal for adjusting antenna receiving sensitivity
CN107623526B (en) * 2017-08-24 2019-11-19 深圳市盛路物联通讯技术有限公司 A kind of method and communication terminal adjusting antenna receiving sensitivity

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