JPS5445519A - Conversion unit for multiplex modulation signal - Google Patents
Conversion unit for multiplex modulation signalInfo
- Publication number
- JPS5445519A JPS5445519A JP11207377A JP11207377A JPS5445519A JP S5445519 A JPS5445519 A JP S5445519A JP 11207377 A JP11207377 A JP 11207377A JP 11207377 A JP11207377 A JP 11207377A JP S5445519 A JPS5445519 A JP S5445519A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- frequency
- charp
- fed
- pulses
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J4/00—Combined time-division and frequency-division multiplex systems
- H04J4/005—Transmultiplexing
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
PURPOSE:To enable to perform light weight, by using elastic surface wave charp filter 12, and the pulses in agreement with the syncronizing pulses are second elastic surface wave charp filter, replacing the difference of delay time into frequency differnce in real time and by making manufacturing essir. CONSTITUTION:The time sharing multiplex input signal is fed to the first elastic surface wave charp filter 12, and the pulses in agreement with the swncronizing pulses are produced with the pulse generator 13, and they are fed to the second elastic wave charp filter 14. Further, frequency conversion is made with the mixing circuit 15,and it is converted into the frequency division multiplex signal via LPF or BPR 16. In the charp filter, the output is delayed in proportional to the frequency component the filter 14 outputs high frequency component with the time elasped from the pulse time point fed to the filter 14. On the other hand,since channel signal is fed in order to the filter 12, frequency conversion 15 is made with higher frequency mor to the channel signals fed later and the frequency more to the channel signals fed later and the frequency division multiplex signal can be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11207377A JPS5445519A (en) | 1977-09-16 | 1977-09-16 | Conversion unit for multiplex modulation signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11207377A JPS5445519A (en) | 1977-09-16 | 1977-09-16 | Conversion unit for multiplex modulation signal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5445519A true JPS5445519A (en) | 1979-04-10 |
JPS5719620B2 JPS5719620B2 (en) | 1982-04-23 |
Family
ID=14577385
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11207377A Granted JPS5445519A (en) | 1977-09-16 | 1977-09-16 | Conversion unit for multiplex modulation signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5445519A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0214649A2 (en) * | 1985-09-10 | 1987-03-18 | Nec Corporation | FDM-TDM transmultiplexing system |
-
1977
- 1977-09-16 JP JP11207377A patent/JPS5445519A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0214649A2 (en) * | 1985-09-10 | 1987-03-18 | Nec Corporation | FDM-TDM transmultiplexing system |
Also Published As
Publication number | Publication date |
---|---|
JPS5719620B2 (en) | 1982-04-23 |
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