JPS5558649A - Error rate monitor unit - Google Patents
Error rate monitor unitInfo
- Publication number
- JPS5558649A JPS5558649A JP13180678A JP13180678A JPS5558649A JP S5558649 A JPS5558649 A JP S5558649A JP 13180678 A JP13180678 A JP 13180678A JP 13180678 A JP13180678 A JP 13180678A JP S5558649 A JPS5558649 A JP S5558649A
- Authority
- JP
- Japan
- Prior art keywords
- output
- error rate
- phase
- psk
- demodulator circuit
- 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
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
- H04L1/206—Arrangements for detecting or preventing errors in the information received using signal quality detector for modulated signals
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
PURPOSE:To estimate always a true error rate correctly by comparing output signals of the first demodulator circuit for synchronizing phase detection and the second demodulator circuit for delay detection with each other to obtain a disagreement output. CONSTITUTION:In the first demodulator circuit 1, PSK phase detector 6 performs the synchronizing detection of an inputted four-phase PSK wave, and the output is discriminated by 3 and is subjected to code conversion in 5, and after that, reproducing signals are outputted. Meanwhile, in the second demodulator circuit 2, the input four- phase PSK wave is subjected to delay detection by PSK phase detector 8, and the output is disciminated by 4 and is outputted. Output signals of the first and the second demodulator circuits are compared with each other through exclusive OR circuits 10 and 11 to obtain a disagreement output. As a result, a false error signal having always correspondence relation to the error rate of reproducing signals obtained from the four-phase PSK modulation wave can be obtained, so that a true error rate can be always estimated correctly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13180678A JPS5558649A (en) | 1978-10-26 | 1978-10-26 | Error rate monitor unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13180678A JPS5558649A (en) | 1978-10-26 | 1978-10-26 | Error rate monitor unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5558649A true JPS5558649A (en) | 1980-05-01 |
Family
ID=15066538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13180678A Pending JPS5558649A (en) | 1978-10-26 | 1978-10-26 | Error rate monitor unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5558649A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4326277A1 (en) * | 1993-08-05 | 1995-02-09 | Sel Alcatel Ag | Method and circuit arrangement for detecting the bit error rate in a digital optical receiver |
JPH0960883A (en) * | 1995-08-21 | 1997-03-04 | San Frontier Technol:Kk | Anti-wind device in gas equipment |
-
1978
- 1978-10-26 JP JP13180678A patent/JPS5558649A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4326277A1 (en) * | 1993-08-05 | 1995-02-09 | Sel Alcatel Ag | Method and circuit arrangement for detecting the bit error rate in a digital optical receiver |
JPH0960883A (en) * | 1995-08-21 | 1997-03-04 | San Frontier Technol:Kk | Anti-wind device in gas equipment |
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