KR970055911A - Eavesdropping device for wireless telephone system - Google Patents

Eavesdropping device for wireless telephone system Download PDF

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Publication number
KR970055911A
KR970055911A KR1019950056355A KR19950056355A KR970055911A KR 970055911 A KR970055911 A KR 970055911A KR 1019950056355 A KR1019950056355 A KR 1019950056355A KR 19950056355 A KR19950056355 A KR 19950056355A KR 970055911 A KR970055911 A KR 970055911A
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KR
South Korea
Prior art keywords
group
modulation
channel
unit
input
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KR1019950056355A
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Korean (ko)
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홍충선
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배순훈
대우전자 주식회사
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Priority to KR1019950056355A priority Critical patent/KR970055911A/en
Publication of KR970055911A publication Critical patent/KR970055911A/en

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Abstract

본 발명은 복수의 그룹(Group)의 각각에 대해 복수의 변/복조주파수채널을 사용자가 입력하고서 통화개시가 되면 사용자가 선택한 그룹내의 복수의 변조 주파수채널이 순차적으로 절환을 하면서 음성신호를 송신하되 그 송신시간이 가변되게 하고 베이스장치측에서는 수신된 신호를 그에 상응하는 복조주파수채널로 복조하여 출력함으로서 도청방지를 도모하도록 한 무선전화시스템의 도청방지장치를 제공하기 위한 것이다.According to the present invention, when a call is initiated by a user inputting a plurality of modulation / demodulation frequency channels for each of a plurality of groups, a plurality of modulation frequency channels in a group selected by the user are sequentially switched to transmit a voice signal. It is to provide an eavesdropping prevention apparatus for a radiotelephone system which allows the transmission time to be varied and the base apparatus side demodulates and outputs the received signal to a corresponding demodulation frequency channel.

이를 위해 본 발명은, 입력되는 음성신호를 변조하여 송신시키는 무선전화기 핸드세트과 수신된 변조파를 복조하여 출력하게 되는 베이스장치로 이루어진 무선전화시스템에서, 상기 무선전화기 핸드세트에는 희망하는 복수의 변/복조주파수채널을 복수의 그룹별로 각각 입력하는 채널입력모드 및 희망하는 그룹을 선택하는 그룹선택모드의 설정이 가능한 키입력부(10)와, 상기 채널입력모드하에서 입력되는 각 그룹별 복수의 변조주파수채널이 저장되는 변조주파수기억부(12), 선택된 그룹의 어느 한 변조주파수채널에 의한 음성신호송신시 해당 그룹 인식용 코드를 부여하는 그룹인식코드부여부(14), 선택된 그룹의 어느 한 변조주파수채널에 의한 음성신호송신시 그 송신시간을 가변시키는 송신시간변환부(16), 변조된 음성신호에 상기 그룹인식코드부여부로부터의 신호가 합성되어 송신되도록 하는 혼합부(24) 및, 상기 그룹별 변/복조주파수채널의 입력/저장동작이 가능하도록 함과 더불어 선택된 그룹내의 변조주파수채널이 순차적인 절환에 의한 변조/송신동작이 행해지되 송신시간이 가변되도록 제어하고 송신시 현재 선택된 그룹에 대한 인식용 코드가 함께 실리도록 제어하는 제어부(28)가 추가로 구비되고, 상기 베이스장치측에는 상기 채널입력모드하에서 입력되는 각 그룹별 복수의 복조주파수채널이 저장되는 복조주파수기억부(30)와, 수신된 신호에서 그룹인식용 코드를 검출하는 그룹인식코드검출부 (34), 현지 수신된 신호의 주파수채널을 검출하는 수신주파수검출부(36) 및, 현재 수신된 신호에 대해 해당 그룹내의 복조주파수채널에 의해 복조되도록 제어하는 CPU(40)가 추가로 구비된 것이다.To this end, the present invention is a radiotelephone system comprising a radiotelephone handset for modulating and transmitting an input voice signal and a base apparatus for demodulating and outputting a received modulated wave. A key input unit 10 capable of setting a channel input mode for inputting a demodulation frequency channel for each of a plurality of groups and a group selection mode for selecting a desired group, and a plurality of modulation frequency channels for each group input under the channel input mode The stored modulation frequency storage unit 12, a group recognition code attaching unit 14 for assigning a code for recognizing the group when transmitting a voice signal by any of the modulation frequency channel of the selected group, any modulation frequency channel of the selected group A transmission time converting section 16 for varying the transmission time when transmitting a voice signal by means of the modulated voice signal. Mixing unit 24 for synthesizing and transmitting the signal from whether or not, and input / storage operation of the modulation / demodulation frequency channels for each group, and the modulation frequency channel in the selected group is modulated / switched by sequential switching. A control unit 28 is further provided to control the transmission time to be varied but to control the transmission time, and to control the recognition code for the currently selected group to be transmitted. A demodulation frequency memory unit 30 for storing a plurality of demodulation frequency channels for each group, a group recognition code detector 34 for detecting a group recognition code from a received signal, and a reception frequency for detecting a frequency channel of a locally received signal Further provided with a detection unit 36 and the CPU 40 for controlling the demodulated frequency channel in the group for the currently received signal The.

Description

무선전화시스템의 도청방지장치Eavesdropping device for wireless telephone system

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 실시예로써 채용되는 무선전화시스템의 도청방지장치를 설명하는 블럭구성도이다.1 is a block diagram illustrating a wiretap prevention apparatus of a radiotelephone system employed as an embodiment of the present invention.

Claims (1)

입력되는 음성신호를 변조하여 송신시키는 무선전화기 핸드세트과 수신된 변조파를 복조하여 출력하게 되는 베이스장치로 이루어진 무선전화시스템에서, 상기 무선전화기 핸드세트에는 희망하는 복수의 변/복조주파수채널을 복수의 그룹별로 각각 입력하는 채널입력모드 및 희망하는 그룹을 선택하는 그룹선택모드의 설정이 가능한 키입력부(10)와, 상기 채널입력모드하에서 입력되는 각 그룹별 복수의 변조주파수채널이 저장되는 변조주파수기억부(12), 선택된 그룹의 어느 한 변조주파수채널에 의한 음성신호송신시 해당 그룹인식용 코드를 부여하는 그룹인식코드부여부 (14), 선택된 그룹의 어느 한 변조주파수채널에 의한 음성신호송신시 그 송신시간을 가변시키는 송신시간변환부(16), 변조된 음성신호에 상기 그룹인식코드부여부로부터의 신호가 합성되어 송신되도록 하는 혼합부(24) 및, 상기 그룹별 변/복조주파수채널의 입력/저장동작이 가능하도록 함과 더불어 선택된 그룹내의 변조주파수채널이 순차적인 절환에 의한 변조/송신동작이 행해지되 송신시간이 가변되도록 제어하고 송신시 현재 선택된 그룹에 대한 인식용 코드가 함께 실리도록 제어하는 제어부(28)가 추가로 구비되고, 상기 베이스장치측에는 상기 채널입력모드하에서 입력되는 각 그룹별 복수의 복조주파수채널이 저장되는 복조주파수기억부(30)와, 수신된 신호에서 그룹인식용 코드를 검출하는 그룹인식코드검출부(34), 현재 수신된 신호의 주파수채널을 검출하는 수신주파수검출부(36) 및, 현재 수신된 신호에 대해 해당 그룹내의 복조주파수채널에 의해 복조되도록 제어하는 CPU(40)가 추가로 구비된 것을 특징으로 하는 무선전화시스템의 도청방지장치.In a radiotelephone system comprising a radiotelephone handset for modulating and transmitting an input voice signal and a base unit for demodulating and outputting a received modulated wave, the radiotelephone handset includes a plurality of desired modulation / demodulation frequency channels. Key input unit 10 capable of setting a channel input mode for inputting each group and a group selection mode for selecting a desired group, and a modulation frequency memory for storing a plurality of modulation frequency channels for each group input under the channel input mode. Part 12, when the voice signal transmission by any of the modulation frequency channel of the selected group, the group recognition code granting unit 14 to give the corresponding group identification code, when the voice signal transmission by any one of the modulation frequency channel of the selected group A transmission time converting section 16 for varying the transmission time, and the signal from the group recognition code adding section to the modulated voice signal Mixing unit 24 for synthesizing and transmitting, and input / storage operations of the modulation / demodulation frequency channels for each group are performed, and modulation / transmission operations are performed by sequentially switching the modulation frequency channels in the selected group. A control unit 28 is further provided to control the transmission time to be variable and to control the recognition code for the currently selected group to be transmitted, and a plurality of demodulations for each group input under the channel input mode on the base apparatus side. A demodulation frequency memory unit 30 storing frequency channels, a group recognition code detector 34 for detecting a group recognition code from a received signal, a reception frequency detector 36 for detecting a frequency channel of a currently received signal, and And a CPU 40 for controlling the demodulation by the demodulation frequency channel in the group with respect to the currently received signal. Prevent eavesdropping device screen system. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950056355A 1995-12-26 1995-12-26 Eavesdropping device for wireless telephone system KR970055911A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950056355A KR970055911A (en) 1995-12-26 1995-12-26 Eavesdropping device for wireless telephone system

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KR1019950056355A KR970055911A (en) 1995-12-26 1995-12-26 Eavesdropping device for wireless telephone system

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KR970055911A true KR970055911A (en) 1997-07-31

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