KR100414212B1 - Mobile station combined with unilateral radio transceiver - Google Patents

Abstract

The present invention relates to a unidirectional radio combined radio terminal, and more particularly, a key input unit (100) for transmitting a switching selection signal and transmitting a transmission or reception selection signal; A mode selection switch 200 which receives a switching control signal and switches to a CDMA mobile communication mode or a radio mode; A frequency supply unit 300 generating and supplying a local signal for CDMA mobile communication, and generating and supplying a local signal for radio; A radio transceiver unit 400 for demodulating the radio frequency RF reception signal into a radio frequency IF received signal and transmitting the demodulated signal to the antenna by modulating the radio frequency IF signal into a radio frequency RF signal; And an MSM 600 that transmits a switching control signal to the mode selection switch 200, receives an IF signal, converts the voice signal into a voice signal, and converts the voice signal into an IF signal. In addition, the present invention adds the function of the current radio to the terminal using a CDMA / FM dual-mode modem to enable individual communication, so that the CDMA mobile communication can be made using the radio mode in the unstable time or short-range area. Rather, it has the effect of improving the performance of the system and providing good call quality to the user.

Description

MOBILE STATION COMBINED WITH UNILATERAL RADIO TRANSCEIVER}

The present invention relates to a unidirectional radio combined radio terminal, and more particularly, using a conventional wireless modem of the CDMA / FM combined method and a PLL for supplying a radio signal to the radio unidirectional radio using a one-way radio through the terminal It relates to a wireless terminal.

In general, radios are divided into industrial, domestic, and simple-frequency communication radios according to their frequency and use. Industrials can be divided into general radio stations and simple radio stations. A simple radio station is used only by a person with a business registration certificate for the frequency band designated by the government. At this time, the industrial radio uses 136 ~ 172Mhz, 444Mhz frequency band, general radio station is used for police, fire department, and military, simple radio station is mainly used in building security, factory security, broadcasting system. In addition, the domestic radio was first introduced in 1995 in Korea to activate wireless communication of general consumers. It is a type 2 living radio station that uses a shortwave frequency of 27Mhz and a second type that uses microwave and microwave frequencies of 440Mhz. Are distinguished.

In a general code division multiple access (CDMA) mobile communication system, when a user wants to communicate with another terminal through his / her own terminal, the user must communicate through a control station and an exchange station through a channel card in the base station, and the VLR (Visitor Location Register) ) And call processing with other terminal through register process and call processing of HLR (Home Location Register).

However, in the above-described general CDMA mobile communication system, the base station, the control station, and the switching station have a problem, or there is a problem that CDMA communication or unstable communication can not be performed in a traffic volume congestion and a call-free area.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to use a CDMA mobile communication and a one-way radio by using a user to select an efficient communication method in a nearby place to select a specific terminal between the terminals. To provide a one-way radio and a wireless terminal that enables communication.

In order to achieve the above object, the present invention provides a unidirectional radio combined terminal comprising: a key input unit which transmits a switching selection signal according to a user's mode selection and transmits a transmission or reception selection signal;

A mode selection switch which receives a switching control signal and switches to a CDMA mobile communication mode or a radio mode;

A first PLL for supplying a local signal of 1620Mhz ~ 1650Mhz used for the CDMA mobile communication, and a second PLL for supplying a local signal of 315Mhz ~ 365Mhz used for the radio, comprising a local signal for CDMA mobile communication and a local signal for radio Frequency supply unit for generating and supplying;

When receiving an RF reception signal for a CDMA mobile communication from an antenna, the signal is mixed with a local signal for CDMA mobile communication received from the frequency supply unit, demodulated into a CDMA mobile communication IF reception signal, and transmitted, and when the CDMA mobile communication IF transmission signal is received, the frequency is received. A CDMA transceiver which modulates the CDMA mobile communication local signal received from a supply unit, modulates the CDMA mobile communication RF signal, and transmits the signal to a base station through the antenna;

A radio receiver receiving RF transceiver signal from the antenna through an RF receiver amplification unit, an RF receiver filter, a mixer for receiving a radio signal, and an IF receiver filter, After demodulating and demodulating the signal into the IF signal for the radio, the transmitter transmits the IF signal for the radio through an IF transmitter filter, a radio transmitter mixer, an RF transmitter, and a radio transmitter having a plurality of RF transmitter filters. A transceiver configured to mix with a radio local signal received from the frequency supply unit, modulate it into an RF transmitter signal for transmission, and transmit the radio signal to another terminal located at a short distance through the antenna; And

Receives a switching selection signal from the key input unit and transmits a switching control signal to the mode selection switch, receives an IF signal from a CDMA transceiver or a transceiver, and converts it into a voice signal for transmission. It is characterized by consisting of the MSM which is converted into a signal and transmitted to the CDMA transceiver or radio transceiver.

1 is a functional block diagram showing an internal configuration of a unidirectional radio wireless combined terminal according to an embodiment of the present invention,

FIG. 2 is a functional block diagram illustrating a detailed configuration of a frequency supply unit of the unidirectional radio combined terminal according to FIG. 1;

3 is a functional block diagram illustrating a detailed configuration of a transceiver unit of the one-way radio combined terminal according to FIG. 1;

4 is a functional block diagram illustrating a detailed configuration of a transceiver of a radio transceiver unit of the unidirectional radio combined terminal according to FIG.

FIG. 5 is a functional block diagram illustrating a detailed configuration of a transceiver of a transceiver of the unidirectional radio combined terminal according to FIG. 3.

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

100: key input unit 200: mode selection switch

300: frequency supply unit 310: first PLL

320: second PLL 400: transceiver transceiver

410: radio receiver 420: radio transmitter

430: transceiver transceiver 500: CDMA transceiver

600: MSM

Hereinafter, with reference to the accompanying drawings, a wireless one-way radio terminal according to an embodiment of the present invention will be described in detail.

1 is a functional block diagram of a wireless one-way radio terminal according to an embodiment of the present invention, the one-way radio combined terminal according to an embodiment of the present invention is a key input unit 100, mode selection switch 200, frequency It is composed of a supply unit 300, a radio transceiver transceiver 400, a CDMA transceiver 500, and the MSM (600).

The key input unit 100 transmits a switching selection signal to the MSM 600 according to a user's mode selection, and transmits a transmission or reception selection signal to the transceiver transceiver 400.

In addition, the mode selection switch 200 receives a switching control signal from the MSM 600 to switch to a CDMA mobile communication mode or a radio mode.

In addition, the frequency supply unit 300 generates a local signal for CDMA mobile communication and supplies it to the CDMA transceiver 500, while generating a local signal for radio and supplies it to the transceiver transceiver 400, As shown in FIG. 2, the first PLL 310 and the second PLL 320 are configured.

The first PLL 310 serves to supply a local signal of 1620Mhz ~ 1650Mhz to the CDMA transceiver 500.

In addition, the second PLL 320 serves to supply a local signal of 315Mhz ~ 365Mhz to the transceiver transceiver 400.

In addition, when the transceiver transceiver 400 receives a radio frequency RF reception signal (448Mhz band) from the antenna, it is mixed with a radio local signal received from the frequency supply unit 300, and a radio IF reception signal (85.38Mhz) After demodulating to transmit to the MSM (600), while receiving a radio transmission IF signal (130.38Mhz) from the MSM (600) mixed with the local signal for the radio received from the frequency supply unit 300 for the radio It modulates the RF transmission signal (448Mhz band) and transmits the signal to the antenna. As shown in FIG. 3, the radio receiver includes a radio receiver 410, a radio transmitter 420, and a radio transceiver switch 430. . In this case, in order to increase the transmission and reception sensitivity, the transceiver transceiver 400 is configured independently of the CDMA mobile communication transceiver 500.

The radio receiver 410 receives a radio frequency RF reception signal (448Mhz band) from the antenna through the radio transceiver switch 430 and demodulates the radio IF signal (85.38Mhz) for the radio to the MSM 600. As shown in FIG. 4, the RF receiver amplifier 411 includes an RF reception amplifier 411, an RF reception filter 412, a mixer 413 for receiving a radio signal, and an IF reception filter 414.

The RF receiving amplifier 411 receives a radio frequency RF reception signal (448Mhz band) from the antenna and amplifies the gain of the radio frequency RF reception signal (448Mhz band) and outputs the RF reception filter 412. Do it.

In addition, the RF reception filter 412 receives a radio frequency RF reception signal (448Mhz band) of the gain amplified from the RF reception amplifier 411 removes the noise through filtering and then the radio signal reception mixer 413 It prints in).

The radio signal receiver mixer 413 receives a radio frequency RF signal (448Mhz band) whose gain is amplified from the RF reception filter 412 and at the same time the second PLL (in the frequency supply unit 300). It receives the radio local signal (315Mhz ~ 365Mhz) from the 320 and mixes and outputs the radio receiver IF received signal (85.38Mhz) to the IF reception filter 414.

In addition, the IF reception filter 414 receives the radio IF reception signal (85.38Mhz) from the radio signal reception mixer 413 and removes noise through filtering and then outputs the MSM 600 to the MSM 600. .

In addition, the radio transmitter 420 receives the radio IF transmission signal (130.38Mhz) from the MSM 600 and modulates the radio RF transmission signal (448Mhz band) for the radio through the transceiver transceiver 430 through the antenna As shown in FIG. 5, an IF transmission filter 421, a transceiver 422 for transmitting a radio signal, an RF transmission amplifier 423, and an RF transmission filter 424 are included.

The IF transmission filter 421 receives a radio IF transmission signal (130.38Mhz) from the MSM 600, removes noise through filtering, and outputs the radio signal to the mixer 422 for transmitting the radio signal.

In addition, the transceiver signal transmission mixer 422 receives a radio IF signal (130.38Mhz) for removing the noise from the IF filter and at the same time the radio from the second PLL 320 in the frequency supply unit 300 It receives a local signal (315Mhz ~ 365Mhz) for mixing and outputs a radio RF signal for transmission (448Mhz band) to the plurality of RF transmission amplifier 423.

In addition, the plurality of RF transmission amplifiers 423 receives the RF transmission signal (448Mhz band) for the radio from the mixer 422 for the radio signal transmission to amplify the gain of the RF transmission signal (448Mhz band) for the radio Outputs to a plurality of RF transmission filter 424.

In addition, the plurality of RF transmission filters 424 receives radio transceiver RF transmission signals (448Mhz band) from the plurality of RF transmission amplifiers 423 and removes noise through filtering to the transceiver transceiver switch 430. It plays a role of outputting.

The radio transceiver switch 430 receives a transmission or reception selection signal from the key input unit 100 to switch to the radio receiver 410 or the radio transmitter 420.

In addition, when the CDMA transceiver 500 receives the CDMA mobile communication RF received signal from the antenna, the CDMA transceiver 500 mixes with the local signal for CDMA mobile communication received from the frequency supply unit 300 and demodulates the CDMA mobile communication IF received signal. When transmitting to the MSM 600, and receiving the CDMA mobile communication IF transmission signal from the MSM 600, it is mixed with the local signal for CDMA mobile communication received from the frequency supply unit 300 and modulated into a CDMA mobile communication RF transmission signal. It then serves to transmit to the base station via the antenna.

The MSM 600 receives a switching selection signal from the key input unit 100 and transmits a switching control signal to the mode selection switch 200, while the CDMA transceiver 500 and the transceiver transceiver ( It receives the IF signal from 400 and converts it into a voice signal and transmits the signal, and also converts the voice signal into an IF signal and transmits it to the CDMA transceiver 500 and the transceiver transceiver 400. In this case, the MSM 600 is a modem chip that uses CDMA / FM as a modem, and raises the radio IF signal from 21Mhz to 85.38Mhz in order to simultaneously modify / demodulate the terminal and the radio using a single modem hand.

Next, an operation process of the one-way radio terminal having the above configuration will be described with reference to FIG. 2.

First, the user selects the radio mode through the key input unit 100 to use the radio mode in the CDMA mobile communication mode.

Then, the MSM 600 receives the switching selection signal from the key input unit 100 and transmits a switching control signal to the mode selection switch 200 to switch from the CDMA mobile communication mode to the radio mode. At this time, when the radio mode is selected, the antenna transmits and receives the radio frequency RF signal without transmitting and receiving the CDMA mobile RF signal.

At this time, the radio transceiver switch 430 receives a reception selection signal from the key input unit 100 and switches to the radio receiver 410. At this time, it is to receive a radio reception signal (448Mhz band) for the radio while using the terminal as a radio.

Thereafter, the antenna receives a radio frequency RF signal from another terminal in a radio mode.

Then, the radio receiver 410 receives the radio RF signal received through the antenna and simultaneously receives the radio local signal from the second PLL 320 and demodulates the radio IF signal (85.38Mhz). To be transmitted to the MSM 600.

On the other hand, the radio transceiver switch 430 receives the transmission selection signal from the key input unit 100 and switches to the radio transmitter 420. At this time, it is to transmit the radio transmitter RF signal (448Mhz band) while using the terminal as a radio.

In addition, the radio transmitter 420 receives the radio IF transmission signal (130.38Mhz) from the MSM (600) and at the same time receives a radio signal for the radio from the second PLL (320) radio RF transmission signal ( 448Mhz band) is transmitted to the antenna through the transceiver switch 430 for the radio.

As described above, according to the present invention, by combining the one-way radio with the one-way radio according to the present invention, the user can make a call through the radio mode in which the user can make a call without paying a call charge in a nearby place by implementing the CDMA mobile communication and the one-way radio. In addition, there is an excellent effect of enabling a call at a short distance even when a CDMA mobile communication is interrupted.

Claims (5)

A key input unit which transmits a switching selection signal according to a user's mode selection and transmits a transmission or reception selection signal; A mode selection switch which receives a switching control signal and switches to a CDMA mobile communication mode or a radio mode; A frequency supply unit for generating and supplying a local signal for CDMA mobile communication and a local signal for radio using a first PLL for supplying a local signal for the CDMA mobile communication and a second PLL for supplying a local signal for the radio; When receiving an RF reception signal for a CDMA mobile communication from an antenna, the signal is mixed with a local signal for CDMA mobile communication received from the frequency supply unit, demodulated into a CDMA mobile communication IF reception signal, and transmitted, and when the CDMA mobile communication IF transmission signal is received, the frequency is received. A CDMA transceiver which modulates the CDMA mobile communication local signal received from a supply unit, modulates the CDMA mobile communication RF signal, and transmits the signal to a base station through the antenna; It is equipped with an RF receiver amplifier, an RF receiver filter, a mixer for receiving a radio signal, and an IF receiver filter to receive an RF receiver signal for the radio from the antenna and to mix it with a local signal for the radio received from the frequency supply unit. A radio receiver unit for demodulating and transmitting an IF received signal, an IF transmitter filter, a mixer for transmitting a radio signal, an RF transmitter amplifier, and a plurality of RF transmitter filters are provided to receive an IF transmitter signal for the radio and simultaneously receive the IF transmitter signal from the frequency supply unit. A radio transceiver comprising a radio transmitter which is mixed with a local radio signal for input and modulated into an RF transmitter signal for transmission and then transmitted to another terminal located at a short distance through the antenna; And Receives a switching selection signal from the key input unit and transmits a switching control signal to the mode selection switch, receives an IF signal from a CDMA transceiver or a transceiver, and converts it into a voice signal for transmission. A unidirectional radio combined terminal, characterized in that composed of MSM to convert the signal to a CDMA transceiver or transceiver transceiver. delete The method of claim 1, The radio transceiver unit may further include a radio transceiver switch configured to switch to the radio receiver or the radio transmitter to receive or transmit an RF signal by receiving a transmission or reception selection signal from the key input unit. Wireless terminal. The method of claim 1, The radio receiver may include: an RF reception amplifier configured to receive a radio frequency RF reception signal (448Mhz band) from the antenna and amplify and output a gain of the radio frequency RF reception signal (448Mhz band); An RF reception filter which receives a radio frequency RF reception signal (448Mhz band) whose gain is amplified from the RF reception amplifier and removes noise through filtering; A radio receiver RF reception signal (448Mhz band) whose gain is amplified from the RF reception filter is input, and a local radio signal (315Mhz ~ 365Mhz) of the radio is mixed from the second PLL in the frequency supply unit and mixed to receive the IF signal for the radio. A mixer for receiving a radio signal outputting (85.38Mhz); And The wireless terminal for one-way radio, characterized in that configured to receive the IF signal received from the radio signal receiving mixer (85.38Mhz) from the mixer for filtering to remove the noise and output through filtering. The method of claim 1, The radio transmitter includes: an IF transmitter filter for receiving a radio IF transmission signal (130.38Mhz) from the MSM and removing the noise through filtering; At the same time as receiving a radio IF signal transmitted from the IF filter (130.38Mhz) is removed from the IF filter while receiving a radio signal (315Mhz ~ 365Mhz) for the radio from the second PLL in the frequency supply unit by mixing the RF signal for the radio ( 448Mhz band) mixer for transmitting radio signal; A plurality of RF transmission amplifiers for receiving a radio frequency RF signal (448Mhz band) from the radio signal transmission mixer and amplifying and outputting a gain of the radio frequency RF signal (448Mhz band); And And a plurality of RF transmission filters for receiving a radio frequency (448Mhz band) radio signal from the plurality of RF transmission amplifiers and removing the noise through filtering.