KR960001112B1 - Transmitting output gain control device of phone - Google Patents
Transmitting output gain control device of phone Download PDFInfo
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- KR960001112B1 KR960001112B1 KR1019910025655A KR910025655A KR960001112B1 KR 960001112 B1 KR960001112 B1 KR 960001112B1 KR 1019910025655 A KR1019910025655 A KR 1019910025655A KR 910025655 A KR910025655 A KR 910025655A KR 960001112 B1 KR960001112 B1 KR 960001112B1
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- control unit
- output gain
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
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- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Transceivers (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
Description
제1도는 종래 무선전화기의 송신장치 구성도.1 is a block diagram of a transmitter of a conventional radiotelephone.
제2도는 본 발명에 의한 무선전화기의 송신출력이득 조정장치 구성도.2 is a block diagram of a transmission output gain adjusting apparatus for a radiotelephone according to the present invention.
제3도는 본 발명에 의한 무선전화기의 송신출력이득 조정 제어 흐름도.3 is a transmission output gain adjustment control flowchart of a radiotelephone according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
11 : 메인제어부 12 : 피엘엘(PLL)11: main controller 12: PLL (PLL)
13 : 송신전압제어 발진기 14 : 프리-앰프13: transmit voltage controlled oscillator 14: pre-amplifier
15 : 메인-앰프 16 : 스위치콘트롤부15: main amplifier 16: switch control unit
17 : 이득조정부 21 : 혼합기17: gain adjusting unit 21: mixer
22 : 국부발진기 23 : 대역여파기22: local oscillator 23: band filter
24 : 제한기 25 : 복조기24: limiter 25: demodulator
26 : 쿼드 검출기 27 : 오디오앰프26: quad detector 27: audio amplifier
28 : 스피커 29 : 아날로그/디지털 변환기28: speaker 29: analog to digital converter
본 발명은 무선전화기의 송신출력이드 조정장치에 관한 것으로 특히, 수신신호의 수신감도를 검출하여 그 수신신호의 세기에 따라 송신출력의 세기가 자동으로 조정되도록 하여 무선전화기의 유대장치에 적당하도록 하는 무선전화기의 송신출력이득 조정장치에 관한 것이다.The present invention relates to an apparatus for adjusting the output power of a radio telephone, and more particularly, to detect the reception sensitivity of a reception signal so that the strength of the transmission output is automatically adjusted according to the strength of the reception signal so as to be suitable for the bonding apparatus of the radio telephone. A transmission output gain adjusting apparatus for a radiotelephone.
종래 무선 전화기의 송신장치는 제1도에 도시된 바와같이 송수신제어를 하는 메인 제어부(1)와, 그 메인 제어부(1)의 송신데이터를 위상동기신호로 발생시키는 피엘엘(PLL)(2)과, 그 피엘엘(2)의 위상 동기를 시켜 전압제어발친(VCO) 출력을 하는 송신전압제어 발진부(3)와, 그 송신전압제어 발진부(3)의 출력신호를 증폭하는 프리-앰프(4)와, 그 프리-앰프(4)의 출력신호를 고정저항(R)에 의한 이득으로 증폭시켜 안태나(6)를 통해 송출하는 메인-앰프(5)와로 구성되어 있었다.The transmitter of the conventional radiotelephone includes a main control unit 1 for transmitting and receiving control as shown in FIG. 1, and a PLL 2 for generating transmission data of the main control unit 1 as a phase synchronization signal. And a transmission voltage controlled oscillator 3 for outputting a voltage controlled oscillation (VCO) by synchronizing the phase of the PEL 2, and a pre-amplifier 4 for amplifying the output signal of the transmitted voltage controlled oscillator 3; ) And the main amplifier 5 which amplifies the output signal of the pre-amplifier 4 with the gain by the fixed resistor R and transmits it through the antenna 6.
이와같이 구성되는 종래 무선전화기의 송신장치는, 무선전화기의 고정장치 및 휴대장치에 각각 구성되어 있는데, 이때, 송신신호를 증폭하는 메인-앰프(5)의 증폭이득이 고정저항(R)에 의해 고정되어 있으므로, 휴대장치와 고정장치간의 거리가 가까운 곳에서 통화를 하고 있는 경우에는 불필요하게 큰 증폭신호가 출력되고, 휴대장치와 고정장치가 거리가 먼 장소에서 통화를 하는 경우에는 증폭이득이 작아서 통화감도가 좋지못하게 되는 문제점이 있었다.The transmission apparatus of the conventional radiotelephone configured as described above is configured in the stationary device and the portable device of the radiotelephone, respectively, in which the amplification gain of the main amplifier 5 for amplifying the transmission signal is fixed by the fixed resistor R. Therefore, when a call is made in a close distance between the portable device and the fixed device, an unnecessarily large amplification signal is output. When the mobile device and the fixed device make a call in a distance, the amplification gain is small. There was a problem that the sensitivity is not good.
특히, 밧데리전원을 사용하는 휴대장치에 있어서는, 휴대장치와 고정장치간의 거리가 가까운 곳에서 통화를 하고 있을때에는 불필요하게 큰 이득으로 송신신호를 증폭하기 때문에 불필요한 전력소모가 되어 밧데리의 수명을 단축시키므로, 자주충전시켜야 되는 등의 문제점이 있었다.In particular, in the case of a portable device using a battery power source, when a telephone call is made at a short distance between the portable device and a fixed device, the transmission signal is amplified by a large gain unnecessarily, resulting in unnecessary power consumption and shortening the life of the battery. There were problems such as frequent charging.
본 발명은 이와같은 문제점을 감안하여 무선전화기의 수신장치에서 수신신호의 수신전계세기신호(RSSI)를 검출하여 디지털신호로 메인 제어부에 입력시키고, 그 메인제어부가 수신감도에 따라 송신이득제어신호를 발생시키고, 그 송신이득제어신호에 의해 메인-엠프의 송신신호 증폭이득을 자동으로 조정할 수 있도록한 무선전화기의 송신출력이득 조정장치를 창안한 것으로 이를 첨부된 도면을 참조해 상세히 설명하면 다음과 같다.In view of the above problems, the present invention detects a received field strength signal (RSSI) of a received signal in a receiving apparatus of a wireless telephone and inputs it as a digital signal to the main control unit, and the main control unit transmits a transmission gain control signal according to the reception sensitivity. A transmission output gain adjusting device of a radiotelephone which is generated and automatically adjusts the amplification gain of the main-amp by the transmission gain control signal is described in detail with reference to the accompanying drawings. .
본 발명에 의한 무선전화기의 송신출력이득 조정장치는 제2도에 도시된 바와 같이 송수신제어를 하는 메인 제어부(11)와, 그 메인제어부(11)의 송신데이터를 위상동기신호로 발생시키는 피엘엘(PLL)(12)과, 그 피엘엘(12)의 위상동기를 시켜 전압제어발진(VCO) 출력을 하는 송신저압제어 발진부(13)와, 그 송신전압 제어 발진부(13)의 출력신호를 증폭하는 프리-앰프(14)와, 그 프리-앰프(14)의 출력신호를 증폭시켜 안테나(ANT)를 통해 송출하는 매인-앰프(5)와, 상기 메인 제어부(11)의 수신감도에 따른 송신이득제어신호에 의해 스위치제어를 하는 스위치콘트롤부(16)와, 그 스위치콘트롤부(16)의 제어에 의해 각기 다른 저항(R1-R3)을 선택하여 상기 메인-앰프(15)의 증폭이득을 조정해주는 이득조정부(17)와로 무선전화기의 송신장치(100)가 구성되어 있고, 상기 안테나(ANT)를 통해 수신되는신호를 국부발진기(22)의 국부발진주파수와 혼합하는 혼합기(21)와, 그 혼합기(21)의 출력신호를 대역통과 필터링하는 대역여파기(23)와, 그 대역여파기(23)를 통한 수신신호를 균등한신호로 제한하는 제한기(24)와, 그 제한기(24)를 통한수신신호를 복조하는 복조기(25)와, 그 복조기(25)의 복조를 위해 위상을 검출해주는 쿼드 검출기(26)와, 상기 복조기(25)의 복조신호를 증폭하여 스피커(28)에 출력시켜 주는 오디오앰프(27)와, 상기 제한기(24)에서 출력된 수신전계세기신호(RSSI ; Received Sterngth Signal Indicator)를 저항(R1) 및 콘덴서(C1)를 통해 입력받아 디지털데이터로 변환시켜 상기 메인제어부(11)에 수신감도데이터로 입력시키는 아날로그/디지털 변환기(29)와로 무선전화기의 수신장치(200)가 구성되어 있다.A transmission output gain adjusting apparatus for a radiotelephone according to the present invention includes a main control unit 11 for transmitting and receiving control as shown in FIG. 2 and a PEL for generating transmission data of the main control unit 11 as a phase synchronization signal. (PLL) 12, a transmission low voltage controlled oscillator 13 for outputting a voltage controlled oscillation (VCO) by synchronizing the phase of the PEL 12, and an output signal of the transmitted voltage controlled oscillator 13 A pre-amplifier 14, a main amplifier 5 which amplifies an output signal of the pre-amplifier 14 and transmits the amplified signal through the antenna ANT, and transmits the signal according to the reception sensitivity of the main controller 11; The switch control unit 16 performs switch control by the gain control signal, and different resistors R1-R3 are selected under the control of the switch control unit 16 to obtain the amplification gain of the main amplifier 15. The gain adjusting unit 17 for adjusting and the transmitter 100 of the radiotelephone is configured, the antenna (AN) A mixer 21 for mixing the signal received through T) with the local oscillation frequency of the local oscillator 22, a bandpass filter 23 for bandpass filtering the output signal of the mixer 21, and a bandpass filter ( A limiter 24 for limiting the received signal through 23) to an equal signal, a demodulator 25 for demodulating the received signal through the limiter 24, and phase detection for demodulation of the demodulator 25; A quad detector 26, an audio amplifier 27 for amplifying the demodulated signal of the demodulator 25 and outputting the demodulated signal to the speaker 28, and a received field strength signal RSSI output from the limiter 24; Received Sterngth Signal Indicator is received through the resistor (R1) and condenser (C1) and converts into digital data and the analog / digital converter (29) for inputting the received sensitivity data to the main control unit 11 and the receiver of the radiotelephone 200 is configured.
이와같이 구성된 본 발명은 무선전화기의 통화상태에서 수신장치(200)에서 수신하는 수신전계세기를 감지한후 수신감도에 따라 송신출력의 이득을 자동으로 조절해주도록 하기 위한 것으로, 먼저 수신장치(200)의 제한기(24)에서는 수신된 신호의 수신전계세기(RSSI)신호가 검출되고, 그 수신전게세기신호(RSSI)는 접지된 저항(R1) 및 콘덴서(C1)를 통해 전압신호로 평활되어 아날로그/디지털 변환기(29)에 입력되고, 그 아날로그/디지털 변환기(29)에서는 전압레벨로 입력된 수신전계세기신호를 디지털 데이터로 변환시켜서 메인 젱처부(11)에 입력시킨다.The present invention configured as described above is intended to automatically adjust the gain of the transmission output according to the reception sensitivity after detecting the reception field strength received by the reception apparatus 200 in the call state of the wireless telephone. In the limiter 24 of the received signal, the received field strength (RSSI) signal of the received signal is detected, and the received field strength signal (RSSI) is smoothed as a voltage signal through the grounded resistor (R1) and capacitor (C1) It is input to the / digital converter 29, and the analog / digital converter 29 converts the received electric field strength signal inputted at the voltage level into digital data and inputs it to the main capture unit 11.
이에따라 메인 제어부(11)는 제3도에 도시된 바와같이 부선전화기의 사용모드일 때, 상기 아날로그/디지털 변환기(29)로부터 수신전계세기 데이터를 읽어들이고, 그 수신전계세기의 크기를 인식하여 수신감도가 좋은지를 판단하고, 수신감도 판단에 따른 송신출력이득제어신호를 상기 스위치콘트롤부(16)에 출력시킨다. 따라서, 그 스위치콘트롤부(16)는 수신감도가 좋을때는 송신출력이득을 낮추는 방향으로 이득조정부(17)를 제어하여 선택저항값을 높이고, 수신감도가 나쁠때는 송신출력이득을 높이는 방향으로 이득조정부(17)를 제어하여 선택저항값을 낮추어 주게 되며, 상기 메인-앰프(15)는, 이득조정부(17)에 선택된 저항값에 따라 이득이 조절되어 송신신호를 증폭한후 안테나(ANT)를 통해 송출시킨다.Accordingly, the main control unit 11 reads the received field strength data from the analog-to-digital converter 29 in the use mode of the secondary telephone, as shown in FIG. 3, recognizes the magnitude of the received field strength, and receives the received field strength. It is judged whether the sensitivity is good, and a transmission output gain control signal according to the reception sensitivity judgment is outputted to the switch controller 16. Therefore, the switch control unit 16 controls the gain adjusting unit 17 in a direction of lowering the transmission output gain when the reception sensitivity is good, thereby increasing the selection resistance value, and in a direction of increasing the transmission output gain when the reception sensitivity is bad. (17) is controlled to lower the selection resistance value, the main amplifier (15), the gain is adjusted according to the resistance value selected by the gain adjuster 17 to amplify the transmission signal through the antenna (ANT) Send it out.
그러므로, 사용자가 고정장치와 가까운 위치에서 무선전화기의 통화목적으로 사용하게 되면, 고정장치나 휴대장치측의 수신장치에서 수신전계세기를검출하고, 그 수신전계세기에 따라 메인제어부(11)에서 송신출력이득을 자동으로 조정해 준다. 여기서는 본 발명에 의한 무선전화기의 송신출력이득 조정장치는, 고정장치와 휴대장치에 모두 적용할 수도 있으며, 특히, 휴대장치측에 적용할 때 송신출력이득을 자동으로 조정해 주므로서, 불필요하게 큰이득으로 증폭시키지 않게 되어 밧데리전원의 소모를 줄일 수 있는 효과가 있다.Therefore, when the user is used for the purpose of the call of the radio telephone in the position close to the fixed device, the receiving device strength is detected by the receiving device on the fixed device or the portable device side, and transmitted by the main control unit 11 according to the received field strength. Automatically adjusts the output gain. Here, the transmission output gain adjusting device of the radiotelephone according to the present invention can be applied to both a fixed device and a portable device. In particular, the transmission output gain adjusting device automatically adjusts the transmission output gain when applied to the portable device side, thereby unnecessarily large. It is not amplified by the gain, thereby reducing the power consumption of the battery power.
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KR1019910025655A KR960001112B1 (en) | 1991-12-31 | 1991-12-31 | Transmitting output gain control device of phone |
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KR1019910025655A KR960001112B1 (en) | 1991-12-31 | 1991-12-31 | Transmitting output gain control device of phone |
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KR930015494A KR930015494A (en) | 1993-07-24 |
KR960001112B1 true KR960001112B1 (en) | 1996-01-18 |
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