KR100333729B1 - Triple mode type wireless frequency variable gain amplification trunk - Google Patents

Abstract

The present invention can provide better call quality to a mobile terminal user by variable gain amplifying and relaying signals of various system frequency bands such as PCS, DCS, and AMPS through one variable gain amplifier using a dual mode antenna. The present invention relates to a triple mode type variable frequency amplification repeater, comprising: first and second dual mode antennas for simultaneously receiving or transmitting a signal for PCS, a signal for DCS, and an amps; PCS radio frequency processing unit and power level detection unit for detecting the weak PCS signal received through the variable gain amplification process according to the gain control signal of the control unit and received through the first, second dual mode antenna Detects the weak DCS and AAMP signals among the signals and outputs them by variable gain amplification processing according to the gain control signal of the controller. DCS, AMPS radio frequency processor and power level detector, PCS radio frequency processor and power level detector, DCS, AMPS radio frequency processor and power level detector And a control unit for outputting a gain adjustment control signal according to the level comparison result.

Description

Triple Mode Type RF Frequency Gain Amplifier {TRIPLE MODE TYPE WIRELESS FREQUENCY VARIABLE GAIN AMPLIFICATION TRUNK}

The present invention relates to a triple mode radio frequency variable gain amplifier repeater, and in particular, through one variable gain amplifier repeater using a dual mode antenna (Personal Communication Service), DCS Triple-mode variable frequency gain amplification to provide better call quality to mobile terminal users by variable gain amplifying and relaying signals of various system frequency bands such as Digital Cellular System and Advanced Mobile Phone Service (AMPS) It relates to a relay device.

In general, a mobile communication system is a personal telephone system owned by an individual. The number of subscribers operating or living in an area or a PCS with a high call density, and a fixed frequency band in a vehicle mobile phone, are used regardless of the size of a service area. DCS uses cell coverage and frequency reuse concepts to accommodate user density, and AMPS, an 800MHz North American automotive analog cellular mobile phone service.

In the case of the PCS, a communication service is provided using a transmission frequency of 1750 to 1780 MHz and a reception frequency of 1840 to 1870 MHz in Korea, and a transmission frequency of 1850 to 1910 MHz and a reception frequency of 1930 to 1990 MHz in the United States. To provide communication services.

In the case of DCS and AMPS, a communication service is provided using a transmission frequency of 824 to 849 MHz and a reception frequency of 869 to 894 MHz based on the terminal.

That is, in the related art, different service providers provide communication services according to frequency bands to be used.

On the other hand, mobile terminals in conventional mobile communication systems such as PCS, DCS, AMPS, etc. detect a weak signal through a relay device which variably amplifies radio frequency and compensates for power loss of radio waves.

However, the conventional repeater in a mobile terminal as described above is inconvenient and cumbersome to have a separate relay device for each system frequency used as a variable gain amplification signal for only one frequency region, that is, only one system. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a variable gain amplification repeater using a dual-mode antenna to variably gain and amplify a signal in a corresponding system frequency band regardless of various systems. By providing a better call quality to the user of the mobile terminal, and by operating the one variable gain amplifier repeater in a triple mode type triple mode type radio that can be used regardless of various systems such as PCS, DCS, AMPS The present invention provides a variable frequency gain amplifier repeater.

1 is a block diagram of a triple mode type variable frequency amplification repeater according to the present invention;

2 is a detailed configuration diagram of a triple mode RF variable gain amplifier repeater according to the present invention;

3 is a table showing insertion loss for each system and device.

<Description of the symbols for the main parts of the drawings>

Ant1,2: first, second dual mode antenna

10: PCS radio frequency processor and power level detector

20: DCS, AMPS radio frequency processor and power level detector

11, 16: Duplexer for 1st, 2nd PCS

12, 22: signal level detector

13, 23: power level comparison unit

14: Receiving variable low noise amplifier for PCS

15, 25: reception bandpass filter

17: Transmission variable low noise amplifier for PCS

18, 28: transmission bandpass filter

21, 26: Duplexer for 1st, 2nd DCS, AMPS

24: Receiving variable low noise amplifier for DCS, AMPS

27: Transmission variable low noise amplifier for DCS, AMPS

30: control unit

40: power supply

Triple mode RF gain amplifier apparatus of the present invention for achieving the above object, the first and second dual-mode antenna for receiving or transmitting a signal for PCS and DCS, AMPS at the same time, and the first 1,2 PCS radio frequency processing unit and power level detector for detecting the weak PCS signal received through the dual-mode antenna and variable gain amplification process according to the gain control signal of the control unit and outputs; DCS, AMPS radio frequency processing unit and power level detection unit for detecting weak DCS, AMPS signal received through the dual mode antenna and outputting the variable gain amplification process according to gain control signal of the control unit, and the PCS radio frequency Power level for PCS signal and DCS / AMPS signal amplification in processor and power level detector and DCS, AMPS radio frequency processor and power level detector And a control unit for outputting a gain adjustment control signal according to the comparison result.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the triple mode RF variable gain amplifier repeater according to the present invention.

1 is a block diagram of a triple mode type variable frequency variable gain amplification repeater according to the present invention, the first and second dual mode antennas (Ant1,2) for simultaneously receiving or transmitting a signal for PCS and a signal for DCS, AMPS And a PCS radio frequency processor for detecting a weak PCS signal among the signals received through the first and second dual mode antennas Ant1 and 2 and outputting the variable gain amplification process according to the gain control signal of the controller. Detects the weak DCS and AAMP signals among the signals received through the level detector 10 and the first and second dual mode antennas Ant1 and 2 and outputs them by a variable gain amplification process according to the gain control signal of the controller. Signals for PCS in the DCS, APS radio frequency processor and power level detector 20, the PCS radio frequency processor and power level detector 10, and the DCS, AAMP radio frequency processor and power level detector 20 And signals for DCS, AMPS Control unit 30 for outputting a gain control signal according to the power level comparison result for the amplification, the PCS radio frequency processor and power level detector 10, DCS, AAMP radio frequency processor and power level detector 20 And a power supply unit 40 supplying operation power to the control unit 30.

The PCS radio frequency processor and power level detector 10 processes a frequency signal of 1.8 to 1.9 GHz, and the DCS, AAMP radio frequency processor and power level detector 20 processes a 800 MHz frequency signal.

2 is a detailed configuration diagram of a triple mode type variable frequency variable gain amplifier repeater according to the present invention, wherein the PCS radio frequency processing unit and the power level detector 10 are provided in a signal received through a first dual mode antenna Ant1. A first PCS duplexer 11 that separates the PCS signal and outputs the input PCS signal to the first dual mode antenna Ant1, and outputs the input PCS signal to the second dual mode antenna Ant2. In addition, the second PCS duplexer 16 which separates the PCS signal from the signal received through the second dual mode antenna Ant2, and the weak separated from the first and second PCS duplexers (11, 16) The signal level detector 12 that detects the level of the PCS signal and converts the detected signal into a DC voltage, and compares the power level of the DC voltage converted by the signal level detector 12 with the power level of the reference voltage. Output the power level comparison result to the controller 30 PCS reception variable which variably amplifies the gain of the weak PCS signal separated by the first PCS duplexer 11 according to the power level comparator 13 and the gain control signal output from the controller 30. A low band amplifier 14 and a reception bandpass filter 15 for filtering the variable gain-amplified PCS signal from the PCS receiving variable low noise amplifier 14 and outputting the filtered signal to the second PCS duplexer 16. Transmission variable low noise amplifier 17 for amplifying the gain of the weak PCS signal separated by the second PCS duplexer 16 according to the gain control signal output from the controller 30, The PCS transmit variable low noise amplifier 17 includes a transmit bandpass filter 18 for filtering the variable gain-amplified PCS signal and outputting the filtered signal to the first PCS duplexer 11.

The DCS, AAMP radio frequency processor and the power level detector 20 separate the DCS and AAMP signals from the signal received through the first dual mode antenna Ant1, and remove the DCS and AAMP signals. The first DCS and APS duplexers 21 output to the dual mode antenna Ant1 and the DCS and APS signals input to the second dual mode antenna Ant2 are output to the second dual mode antenna Ant2. For the weak DCS, AMPS separated from the second DCS, AMPS duplexer 26 to separate the DCS, AMPS signal from the signal received through the first and second DCS, AMPS duplexer 21,26 A signal level detector 22 that detects a signal level and converts the detected signal into a DC voltage, and compares the power level of the DC voltage converted by the signal level detector 22 with the power level of the reference voltage. The power level comparison unit 23 for outputting a level comparison result to the control unit 30, and the control unit 30. A DCS and Amps variable low noise amplifier 24 for amplifying the gain of the weak DCS and APS signals separated by the first DCS and APS duplexers 21 according to the gain control signal outputted from the first and second DCS and AAMPs; The reception bandpass filter 25 performs filtering on the DCS and APS signals that are variable-amplified and amplified in the AMPS receiving variable low noise amplifier 24 and then outputs them to the second DCS and AMPS duplexer 26. In accordance with the gain control signal output from the control unit 30, a variable transmission noise amplifier for DCS and AAMPs 27 variably amplifies the gain of the weak DCS and APS signals separated by the second DCS and AMPs duplexer 26. And a transmission bandpass filter outputting the DCS and APS duplexers 21 after filtering the DCS and APS signals that are variable-amplified and amplified by the DCS and APS transmission variable low noise amplifiers 27. It consists of 28.

As described above, the triple mode type RF variable gain amplifier repeater of the present invention can simultaneously cover two services for variable frequency amplification and relay operation for three systems of PCS, DCS, and AMPS. 2 The reception / transmission variable low noise amplifiers 14 and 17 for PCS and the reception / transmission variable low noise amplifiers 24 and 27 for the PCS and the dual mode antennas Ant1 and 2 to minimize interference of both signals. And a variable gain amplification for weak signals of both PCS, DCS and AMPS through the controller 30 incorporating a microprocessor.

Referring to the operation of the triple mode radio frequency variable gain amplifier repeater of the present invention configured as described above is as follows.

In the case of receiving a signal for PCS, first, the PCS duplexer 11 in the PCS radio frequency processor and power level detector 10 receives the signal for PCS from the signal received through the first dual mode antenna Ant1. Disconnect.

That is, the first PCS duplexer 11 serves as a band pass filter to separate signals of different bands.

Subsequently, the signal level detector 12 detects the level of the weak PCS signal separated from the first PCS duplexer 11, converts the detected signal into a DC voltage, and converts the detected signal into a DC voltage. Will output

Then, the power level comparison unit 13 compares the power level of the DC voltage converted by the signal level detector 12 with the power level of the reference voltage, and outputs a power level comparison result to the controller 30.

Subsequently, the control unit 30 calculates the gain control signal for variable gain amplification by the microprocessor using the power level comparison result output from the power level comparison unit 13 to the receiving variable low noise amplifier 14 for the PCS. do.

Subsequently, the PCS receiving variable low noise amplifier 14 variably amplifies the gain of the weak PCS signal separated by the first PCS duplexer 11 according to the gain control signal output from the control unit 30 to receive the reception band. Output to the pass filter 15.

Then, the reception bandpass filter 15 filters the variable gain-amplified PCS signal in the PCS reception variable low noise amplifier 14 and outputs the filtered signal to the second PCS duplexer 16.

On the contrary, in the case of transmitting the signal for the PCS, first, the second PCS duplexer 16 in the PCS radio frequency processor and power level detector 10 receives the PCS from the signal received through the second dual mode antenna Ant2. Disconnect the dragon signal.

Subsequently, the signal level detector 12 detects the level of the weak PCS signal separated by the second PCS duplexer 16, converts the detected signal into a DC voltage, and converts the detected signal into a DC voltage. Will output

Then, the power level comparison unit 13 compares the power level of the DC voltage converted by the signal level detector 12 with the power level of the reference voltage, and outputs a power level comparison result to the controller 30.

Subsequently, the control unit 30 calculates the gain control signal for the variable gain amplification by the microprocessor using the power level comparison result output from the power level comparison unit 13 to the transmit variable low noise amplifier 17 for the PCS. do.

Subsequently, the PCS transmission variable low noise amplifier 17 variably amplifies the gain of the weak PCS signal separated by the second PCS duplexer 16 according to the gain control signal output from the control unit 30 to transmit the transmission band. Output to the pass filter 18.

Then, the transmission bandpass filter 18 filters the variable gain-amplified PCS signal in the PCS transmission variable low noise amplifier 17 and then performs a first dual mode antenna through the first PCS duplexer 11. Output to (Ant1).

On the other hand, the operation of receiving and transmitting signals for the DCS and APS is the same as the operation of receiving and transmitting the signal for the PCS, detailed description thereof will be omitted.

FIG. 3 is a table showing insertion loss for each system and device. As shown in the table of FIG. 3, the insertion loss of the system itself is 9.5 to 11 dB.

In addition, since the loss of the propagation shadow area such as a known building is about 15 dB, the total loss of 26 dB which is the sum of the loss of the system itself and the loss of the shadow area that we want to compensate should be compensated by the gain of the variable low noise amplifier.

Accordingly, when designing in consideration of the bias of the variable low noise amplifier, the gain of the variable low noise amplifier may be about 10 dB to 26 dB.

As described above, the mobile terminal is detected by a variable gain amplification and relayed by detecting a weak signal of three PCS, DCS, and AMPS systems in a radio shadow region through a single variable gain amplifier using a dual mode antenna. In addition to providing better call quality and call connection rate to the user, there is an effect of reducing the current consumption of the mobile terminal to increase battery standby and usage time.

In addition, by operating the single variable gain amplification repeater in a triple mode type, regardless of various systems, such as PCS, DCS, AMPS, there is an advantage that the service provider obtains an economic effect.

Claims (3)

First and second dual mode antennas for simultaneously receiving or transmitting signals for PCS and signals for DCS and AMPS; A PCS radio frequency processor and a power level detector for detecting a weak PCS signal among the signals received through the first and second dual mode antennas and outputting the variable gain amplification process according to the gain control signal of the controller; A DCS, AMPS radio frequency processor and a power level detector for detecting a weak DCS and AMPS signal received through the first and second dual mode antennas and outputting the variable gain amplification process according to the gain control signal of the controller; , And a controller for outputting the PCS signal and the gain control signal for DCS and AAMP signal amplification in the PCS radio frequency processor and power level detector and the DCS and AMP radio frequency processor and power level detector. Triple-mode variable frequency amplification repeater. 2. The apparatus of claim 1, wherein the PCS radio frequency processor and the power level detector separate a PCS signal from a signal received through a first dual mode antenna, and output the PCS signal to the first dual mode antenna. A first PCS duplexer, a second PCS duplexer for outputting the PCS signal to be input to the second dual mode antenna, and separating the PCS signal from a signal received through the second dual mode antenna, and the first and second A signal level detector for detecting a weak level of the PCS signal separated from the PCS duplexer and converting the detected signal into a DC voltage; and a power level of the reference voltage based on the power level of the DC voltage converted by the signal level detector. And a power level comparison unit for outputting a power level comparison result to the controller, and separated from the first PCS duplexer according to a gain control signal output from the controller. A receiving variable low noise amplifier for PCS that variably amplifies the gain of a weak PCS signal, and receiving the filtered output signal to the second PCS duplexer after performing filtering on the variable gain-amplified PCS signal in the receiving variable low noise amplifier for PCS. A transmit variable low noise amplifier for PCS for variable amplifying gain of a weak PCS signal separated by a second PCS duplexer according to a band pass filter, a gain control signal output from the controller, and a transmit variable low noise amplifier for PCS And a transmission bandpass filter configured to perform filtering on the variable gain-amplified PCS signal and output to the first PCS duplexer. The DCS and APS radio frequency processor and the power level detector separate the DCS and AAMP signals from the signals received through the first dual mode antenna, and input the DCS and AAMP signals to the first dual. Outputting the first DCS and AMPS duplexer and the input DCS and AMPS signal to the second dual mode antenna, and separating the DCS and AAMP signals from the signal received through the second dual mode antenna. A signal level detector for detecting a level of the weak DCS and AAMP signals separated from the second and second DCS and APS duplexers, and converting the detected signal into a DC voltage; The power level comparison unit outputs a power level comparison result to the controller by comparing the power level of the DC voltage converted by the signal level detector with the power level of the reference voltage, and according to the gain control signal output from the controller. Receiving variable low noise amplifier for DCS, AMPS for variable amplifying gain of weak DCS, AMPS signal separated in first DCS, AMPS duplexer, and DCS, AMPS for variable gain amplification in receiving variable low noise amplifier for DCS, AMPS A weak DCS separated from the second DCS / AMPS duplexer according to a reception bandpass filter outputting the second DCS / AMPS duplexer after filtering the received signal and the gain control signal output from the controller. A DCS and APS transmit variable low noise amplifier for variable amplifying the gain of the APS signal, and the DCS and APS signals that are variable amplified by the DCS and APS transmit variable low noise amplifier after filtering the first DCS And a transmission bandpass filter output to the APS duplexer.