JPS573440A - Adaptive equalizer - Google Patents
Adaptive equalizerInfo
- Publication number
- JPS573440A JPS573440A JP7742180A JP7742180A JPS573440A JP S573440 A JPS573440 A JP S573440A JP 7742180 A JP7742180 A JP 7742180A JP 7742180 A JP7742180 A JP 7742180A JP S573440 A JPS573440 A JP S573440A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- equalizer
- inputted
- polyphase
- value
- 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
- 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
- H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
- H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
Abstract
PURPOSE:To make a drawing-in range broad while making convergence possible even in greater initial interference between codes, by comparing a demodulated waveform value of two series of a received polyphase and multivalue modulation with a prescribed value, and changing the characteristic of an equalizer through the discrimination of polyphase only when it is greater than the rescribed value. CONSTITUTION:The demodulated waveform of two series of polyphase and multivalue modulation is outputted with 2 series of signals by an input to an equalizer 3 from terminals 1, 2, and the output is branched into three and it is inputted to an evaluating value calculation circuit 4 and the evaluating value is inputted to a comparison circuit 8. where it is compared with a prescribed value inputted from a terminal 7, and when the input from a circuit 4 is greater, 1 is outputted to a discriminating circuit 5 and, when smaller, 0 is outputted. Further, only when the circuit 5 inputs 1, it decides that the received waveform is distributed in the range where the decision of the polyphase modulation is made accurate. The output is inputted to a correction circuit 6 according to the output of the equalizer 3. Next, the circuit 6 outputs a signal to change the characteristic of the equalizer 3, allowing to make adaptive the equalization of wider drawing-n range.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7742180A JPS573440A (en) | 1980-06-09 | 1980-06-09 | Adaptive equalizer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7742180A JPS573440A (en) | 1980-06-09 | 1980-06-09 | Adaptive equalizer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS573440A true JPS573440A (en) | 1982-01-08 |
JPS641982B2 JPS641982B2 (en) | 1989-01-13 |
Family
ID=13633490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7742180A Granted JPS573440A (en) | 1980-06-09 | 1980-06-09 | Adaptive equalizer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS573440A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58198928A (en) * | 1982-04-28 | 1983-11-19 | ノーザン・テレコム・リミテツド | Method and device for controlling slope compensation of intermediate frequency |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0483680U (en) * | 1990-11-29 | 1992-07-21 |
-
1980
- 1980-06-09 JP JP7742180A patent/JPS573440A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58198928A (en) * | 1982-04-28 | 1983-11-19 | ノーザン・テレコム・リミテツド | Method and device for controlling slope compensation of intermediate frequency |
Also Published As
Publication number | Publication date |
---|---|
JPS641982B2 (en) | 1989-01-13 |
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