KR970055902A - Prevention of eavesdropping in wireless telephone systems - Google Patents
Prevention of eavesdropping in wireless telephone systems Download PDFInfo
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- KR970055902A KR970055902A KR1019950054461A KR19950054461A KR970055902A KR 970055902 A KR970055902 A KR 970055902A KR 1019950054461 A KR1019950054461 A KR 1019950054461A KR 19950054461 A KR19950054461 A KR 19950054461A KR 970055902 A KR970055902 A KR 970055902A
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Abstract
본 발명은 사용자가 미리 희망하는 변/복조주파수채널을 복수개 입력하고서 통화개시가 되면 기저장된 복수의 변조주파수채널을 순차적으로 절환시키되 송신시간을 랜덤하게 하여 음성신호를 송신하고 베이스장치축에서는 수신된 신호를 해당 복조주파수채널로 복조하여 출력함으로써 도청방지의 효율을 극대화하도록 한 무선전화시스템의 도청방지방법을 제공하기 위한 것이다.According to the present invention, when a user inputs a plurality of desired modulation / demodulation frequency channels in advance, when a call is initiated, a plurality of pre-stored modulation frequency channels are sequentially switched, but at a random transmission time, a voice signal is transmitted. The present invention provides a method for preventing eavesdropping of a radiotelephone system to maximize the efficiency of eavesdropping by demodulating and outputting a signal to a corresponding demodulation frequency channel.
이를 위해 본 발명은, 베이스장치와 무선전화기 핸드셋으로 이루어진 무선전화시스템에서, 통화가 개시되면 기저장된 복수의 변/복조주파수채널중 변조주파수채널을 순차적으로 절환시키면서 음성변조 후 송신시키되 그 송신시간을 상호 가변되도록 하고, 통화종료신호의 입력여부에 따라 상기 음성변조/송신동작을 반복수행하는 송신시의 과정과; 통화개시가 행해지면 수신되는 변조신호에서 현재의 주파수채널을 검출하여 기저장된 복수의 변/복조주파수채널중 해당 복조주파수채널에 의해 복조출력시키고, 통화종료신호의 입력여부에 따라 상기 신호복조/출력동작을 반복수행하는 수신시의 과정으로 구성되고, 상기 기저장된 복수의 변/복조주파수채널은 사용자에 의해 입력/저장되도록 한 것이다.To this end, the present invention, in the radiotelephone system consisting of a base unit and a radiotelephone handset, when the call is initiated after the voice modulation and sequentially switching the modulation frequency channel of a plurality of pre-stored modulation / demodulation frequency channel, but the transmission time A transmission process for varying mutually and repeatedly performing the voice modulation / transmission operation according to whether or not a call termination signal is input; When a call is initiated, a current frequency channel is detected from a received modulation signal and demodulated and output by a corresponding demodulation frequency channel among a plurality of prestored modulation / demodulation frequency channels, and the signal demodulation / output is performed according to whether or not a call termination signal is input. It consists of a process at the time of receiving repeatedly performing the operation, wherein the pre-stored plurality of modulation / demodulation frequency channel is to be input / stored by the user.
※ 대표도 : 제2도※ Representative: 2nd
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 본 발명의 실시예로써 채용되는 무선전화시스템의 도청방지장치의 블럭구성도.1 is a block diagram of a wiretap prevention apparatus of a wireless telephone system employed as an embodiment of the present invention.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950054461A KR970055902A (en) | 1995-12-22 | 1995-12-22 | Prevention of eavesdropping in wireless telephone systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950054461A KR970055902A (en) | 1995-12-22 | 1995-12-22 | Prevention of eavesdropping in wireless telephone systems |
Publications (1)
Publication Number | Publication Date |
---|---|
KR970055902A true KR970055902A (en) | 1997-07-31 |
Family
ID=66617442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950054461A KR970055902A (en) | 1995-12-22 | 1995-12-22 | Prevention of eavesdropping in wireless telephone systems |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR970055902A (en) |
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1995
- 1995-12-22 KR KR1019950054461A patent/KR970055902A/en not_active Application Discontinuation
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WITN | Withdrawal due to no request for examination |