JPS5690648A - Auxiliary signal transmission system - Google Patents
Auxiliary signal transmission systemInfo
- Publication number
- JPS5690648A JPS5690648A JP16694479A JP16694479A JPS5690648A JP S5690648 A JPS5690648 A JP S5690648A JP 16694479 A JP16694479 A JP 16694479A JP 16694479 A JP16694479 A JP 16694479A JP S5690648 A JPS5690648 A JP S5690648A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- auxiliary signal
- auxiliary
- main signal
- received
- 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
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
Abstract
PURPOSE:To realize application to a system whose fixed deterioration increases due to frequency modulation, by transmitting an auxiliary signal by diffusing its frequency band to a frequency band assigned to a main signal by using a spectrum diffusion system. CONSTITUTION:Main signal (a) is modulated by modulator 11 and at the same time, auxiliary signal (b) is also modulated by modulator 12 by using spurious noise carrier source 13. Composite signal (c) of main signal (a) and auxiliary signal (b) is received by receiver 2. This received signal (c) is demodulated by main signal demodulator 21 to extract main signal (a). Further, the received signal (c) is transferred to correlator 23 via detector 22 to find the correlation to the output signal of spurious noise carrier source 24 generating the same signal with spurious carrier source 13 of transmitter 1. Then, auxiliary signal (b) is extracted by the output of correlator 23.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16694479A JPS5690648A (en) | 1979-12-24 | 1979-12-24 | Auxiliary signal transmission system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16694479A JPS5690648A (en) | 1979-12-24 | 1979-12-24 | Auxiliary signal transmission system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5690648A true JPS5690648A (en) | 1981-07-22 |
Family
ID=15840521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16694479A Pending JPS5690648A (en) | 1979-12-24 | 1979-12-24 | Auxiliary signal transmission system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5690648A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0098300A1 (en) * | 1982-01-08 | 1984-01-18 | Applied Spectrum Tech | Simultaneous transmission of two information signals within a band-limited communications channel. |
US4682327A (en) * | 1984-02-03 | 1987-07-21 | Nippon Telegraph And Telephone Corp. | Polyphase phase lock oscillator |
JPS62176232A (en) * | 1986-01-29 | 1987-08-03 | Nippon Telegr & Teleph Corp <Ntt> | Multiplex transmission system |
-
1979
- 1979-12-24 JP JP16694479A patent/JPS5690648A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0098300A1 (en) * | 1982-01-08 | 1984-01-18 | Applied Spectrum Tech | Simultaneous transmission of two information signals within a band-limited communications channel. |
US4682327A (en) * | 1984-02-03 | 1987-07-21 | Nippon Telegraph And Telephone Corp. | Polyphase phase lock oscillator |
JPS62176232A (en) * | 1986-01-29 | 1987-08-03 | Nippon Telegr & Teleph Corp <Ntt> | Multiplex transmission system |
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