JPS561631A - Detecting system for automatic equalizer training signal - Google Patents
Detecting system for automatic equalizer training signalInfo
- Publication number
- JPS561631A JPS561631A JP7654179A JP7654179A JPS561631A JP S561631 A JPS561631 A JP S561631A JP 7654179 A JP7654179 A JP 7654179A JP 7654179 A JP7654179 A JP 7654179A JP S561631 A JPS561631 A JP S561631A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- level
- circuit
- output
- automatic equalizer
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03114—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
- H04L25/03133—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals with a non-recursive structure
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE:To detect the training signal for setting the characteristics of the automatic equalizer, by making effective the output of the level deciding circuit only when the reception signal level is higher than the prescribed level and then starting the detection for the fixed segment advised by CCIT. CONSTITUTION:The signal sent from input terminal 11 is demodulated at demodulator circuit 24, and the demodulated in-phase signal and the orthogonal signal are obtained at terminals 25 and 26 each. Then the square sum is produced through envelope signal producing circuit 27 for both the demodulated in-phase signal and the orthogonal signal. On the other hand, the reception signal from terminal 11 undergoes the level decision by reception signal level detector 12, and the logic product is obtained through AND logic circuit 29 between the above decision output and the output of level deciding circuit 28. Then the output of circuit 28 is made effective only when the reception signal level is higher than the prescribed value, and thus the detection is started for the fixed segment advised by CCIT. In this way, the training signal can be detected for setting the characteristics of the automatic equalizer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7654179A JPS561631A (en) | 1979-06-18 | 1979-06-18 | Detecting system for automatic equalizer training signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7654179A JPS561631A (en) | 1979-06-18 | 1979-06-18 | Detecting system for automatic equalizer training signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS561631A true JPS561631A (en) | 1981-01-09 |
Family
ID=13608122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7654179A Pending JPS561631A (en) | 1979-06-18 | 1979-06-18 | Detecting system for automatic equalizer training signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS561631A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4608703A (en) * | 1983-05-12 | 1986-08-26 | Ricoh Company, Ltd. | Synchronization detection system for data transmission |
-
1979
- 1979-06-18 JP JP7654179A patent/JPS561631A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4608703A (en) * | 1983-05-12 | 1986-08-26 | Ricoh Company, Ltd. | Synchronization detection system for data transmission |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5582552A (en) | Bidirectional data communication system | |
JPS561631A (en) | Detecting system for automatic equalizer training signal | |
JPS54139417A (en) | Interpolation receiving devices at voice short break time | |
JPS57127367A (en) | Receiver of television sound signal | |
JPS5643854A (en) | Control system of received carrier detecting circuit | |
JPS5694862A (en) | Signal transmission circuit | |
JPS5485630A (en) | Demodulator for ternary signal | |
JPS5511602A (en) | Automatic amplitude phase equalization system for fm circuit | |
JPS55124827A (en) | Failure discrimination system for data transmission system | |
JPS5528615A (en) | Data communication system | |
JPS55117314A (en) | Fm demodulator | |
JPS5578683A (en) | Receiver | |
JPS5680921A (en) | Automatic tuning circuit | |
JPS5549051A (en) | Pcm data signal separation system | |
JPS5799851A (en) | Signal transmission system | |
JPS5594170A (en) | Fish detector for type discrimination | |
JPS57174957A (en) | Multi-path interference rejecting circuit | |
JPS55120229A (en) | Set stand-by reception system for frequency-modulated wave | |
JPS57152744A (en) | System for detection of receiver fault | |
JPS6444644A (en) | Data controller for rds receiver | |
JPS5760744A (en) | Discrimination method for signal transmission state in mobile communication | |
SU974596A1 (en) | Device for receiving signals through two parallel channels | |
JPS5718140A (en) | Television signal receiving system | |
JPS5267217A (en) | Color demodulation circuit of color tv receiver | |
JPS55156460A (en) | Carrier detecting circuit |