JPS6430340A - System for multiplex communications by spread spectrum - Google Patents
System for multiplex communications by spread spectrumInfo
- Publication number
- JPS6430340A JPS6430340A JP62187271A JP18727187A JPS6430340A JP S6430340 A JPS6430340 A JP S6430340A JP 62187271 A JP62187271 A JP 62187271A JP 18727187 A JP18727187 A JP 18727187A JP S6430340 A JPS6430340 A JP S6430340A
- Authority
- JP
- Japan
- Prior art keywords
- information data
- spreading
- spreading code
- condition
- frequency
- 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
Abstract
PURPOSE:To eliminate an interfering component and to obtain simplified and comparatively small-sized circuit and constitution by close arranging spectra of respective two-phase PSK signals modulated by different information data so as to go to condition in which they do not interfere with one another and executing a spreading with a single spreading code. CONSTITUTION:Primary modulated waves of different plural information data I1 and I2 are close adding-arranged in a condition in which they do not interfere frequency-spectrally, a spreading is executed by means of the single spreading code by a clock signal frequency for the spreading code set beforehand and the period length of the spreading code, and the multiplexing of the information data by spread spectrum 9 in maintaining the condition in which an interference does not occur frequency-spectrally. At the time of demodulating, separating detections 26 and 27 and detections 28 and 29 of plural primary modulated waves after an reverse spreading 23 are executed, and independent plural information data are obtained. Thus, the interfering component can be eliminated, and a device can be miniaturized.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62187271A JPS6430340A (en) | 1987-07-27 | 1987-07-27 | System for multiplex communications by spread spectrum |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62187271A JPS6430340A (en) | 1987-07-27 | 1987-07-27 | System for multiplex communications by spread spectrum |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6430340A true JPS6430340A (en) | 1989-02-01 |
Family
ID=16203068
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62187271A Pending JPS6430340A (en) | 1987-07-27 | 1987-07-27 | System for multiplex communications by spread spectrum |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6430340A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02272928A (en) * | 1989-04-14 | 1990-11-07 | Mitsui Mining & Smelting Co Ltd | Multi-channel type spread spectrum communication equipment |
JPH05268189A (en) * | 1992-03-18 | 1993-10-15 | Kokusai Denshin Denwa Co Ltd <Kdd> | Spread spectrum communication system |
-
1987
- 1987-07-27 JP JP62187271A patent/JPS6430340A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02272928A (en) * | 1989-04-14 | 1990-11-07 | Mitsui Mining & Smelting Co Ltd | Multi-channel type spread spectrum communication equipment |
JPH05268189A (en) * | 1992-03-18 | 1993-10-15 | Kokusai Denshin Denwa Co Ltd <Kdd> | Spread spectrum communication system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3567779D1 (en) | Spread spectrum signal receiver | |
AU8214187A (en) | Circuit for extracting carrier signals | |
EP0809364A3 (en) | Spread spectrum communication system | |
JPS53108481A (en) | Digital frequency analyzer | |
DK128787A (en) | RADIO PHONE DEVICES FOR COMMUNICATING INFORMATION SIGNALS OVER A RELEASED FREQUENCY CHANNEL | |
AU512872B2 (en) | C. T. data channel multiplexing | |
GB2181315B (en) | Clock shaping circuit | |
DE3062838D1 (en) | Switching method for time division multiplex signals transmitted by a carrier wave, particularly an optical wave, and device for putting it into use | |
JPS6430340A (en) | System for multiplex communications by spread spectrum | |
DE3275154D1 (en) | Method for transmitting bandlimited speech signals with protection against eavesdropping | |
JPS6465473A (en) | Satellite communication and position measurement system for moving body | |
JPS6430341A (en) | Spread spectrum communications system | |
JPS56152346A (en) | Optical transmission and receiving device | |
JPS5391612A (en) | Receiver for multiple frequency signal | |
JPS5366110A (en) | Waveform transmitting system | |
JPS6430339A (en) | Spread spectrum communication system | |
BG102091A (en) | Method for modulation and circuit for the transmission of data-containing signals | |
SU118528A1 (en) | Synchronous multichannel communication method | |
JPS5375706A (en) | Frequency modulator of carrier summing type | |
JPS56169951A (en) | Band split type spectrum diffusion multiplex communication system | |
JPS55105491A (en) | Data exchange system | |
JPS53118911A (en) | Data modulation and demodulation unit | |
JPS522207A (en) | Receiving circuit | |
JPS5380112A (en) | Time division multiplexing communication unit | |
JPS54558A (en) | Modulation and demodulation system |