JPS5351903A - Radio communication system - Google Patents
Radio communication systemInfo
- Publication number
- JPS5351903A JPS5351903A JP12673476A JP12673476A JPS5351903A JP S5351903 A JPS5351903 A JP S5351903A JP 12673476 A JP12673476 A JP 12673476A JP 12673476 A JP12673476 A JP 12673476A JP S5351903 A JPS5351903 A JP S5351903A
- Authority
- JP
- Japan
- Prior art keywords
- communication system
- radio communication
- electric field
- input electric
- intelligibility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To improve the S/N ratio at low input electric field and to increase the intelligibility, by controlling the frequency inversion privacy call depending on the input electric field.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12673476A JPS5351903A (en) | 1976-10-21 | 1976-10-21 | Radio communication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12673476A JPS5351903A (en) | 1976-10-21 | 1976-10-21 | Radio communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5351903A true JPS5351903A (en) | 1978-05-11 |
Family
ID=14942556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12673476A Pending JPS5351903A (en) | 1976-10-21 | 1976-10-21 | Radio communication system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5351903A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04288738A (en) * | 1991-03-18 | 1992-10-13 | Tamura Electric Works Ltd | Privacy telephone system |
-
1976
- 1976-10-21 JP JP12673476A patent/JPS5351903A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04288738A (en) * | 1991-03-18 | 1992-10-13 | Tamura Electric Works Ltd | Privacy telephone system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS52153651A (en) | Gain changing circuit | |
JPS5351903A (en) | Radio communication system | |
JPS5339811A (en) | High frequency amplifier circuit | |
JPS5235916A (en) | Frequency control system in satelite communiction | |
JPS52137222A (en) | Interface system | |
JPS5328306A (en) | Channel geover system of busy channel i n mobile communication | |
JPS5448411A (en) | Control system for mobile communication | |
JPS5362402A (en) | Loudening telephone unit | |
JPS532003A (en) | Circuit control of mobile communication | |
JPS52137201A (en) | Loop communication system by which right of main station can be transferred | |
JPS51128208A (en) | Idling power saving | |
JPS532005A (en) | Circuit control | |
JPS52153302A (en) | Privacy telephone set | |
JPS5223204A (en) | Telephone radio relay device | |
JPS5329606A (en) | Simple type hand-free communicating unit | |
JPS532004A (en) | Radio circuit control | |
JPS5355944A (en) | Active filter/oscillator | |
JPS53104110A (en) | Radio relay set | |
JPS52143703A (en) | Telephone circuit | |
BELIUSTINA et al. | Use of computers for calculation of the capture band of nonlinear phase-automatic-frequency-control systems | |
JPS51132379A (en) | Anti oscillation device | |
JPS5368003A (en) | Control system for secretary telephone device | |
JPS5370708A (en) | Multi-frequency receiver circuit | |
JPS5240003A (en) | Hand-free telephone equipment | |
JPS5286714A (en) | Muting system in angular modulating wave decoding circuit |