JPS6424638A - Automatic equalizing circuit - Google Patents
Automatic equalizing circuitInfo
- Publication number
- JPS6424638A JPS6424638A JP18010687A JP18010687A JPS6424638A JP S6424638 A JPS6424638 A JP S6424638A JP 18010687 A JP18010687 A JP 18010687A JP 18010687 A JP18010687 A JP 18010687A JP S6424638 A JPS6424638 A JP S6424638A
- Authority
- JP
- Japan
- Prior art keywords
- value
- circuit
- prescribed
- tap coefficient
- equalizing 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
Abstract
PURPOSE:To control a transversal type automatic equalizing circuit, independently of the sampling phase by multiplying the content of an output of a transversal filter with the content of a memory circuit, averaging the values and outputting a tap coefficient of the transversal filter according to the mean value. CONSTITUTION:A transversal filter 2, a multiplier 3 and an adder 4 constitute an equalizing section of a conventional transversal type automatic equalizing circuit. A memory circuit 6, a multiplier 6, and an averaging circuit 7 calculate mean power E at the output point of the equalizing circuit. A control circuit 8 decides the tap coefficient by the computed E. When the value E is smaller than a prescribed value, each tap coefficient is increased simultaneously according to a prescribed rule and when the value E is larger than a prescribed value, each tap coefficient is decreased simultaneously according to a prescribed rule, thereby controlling the value E to a prescribed value. The inter-code interference is made zero when the value E reaches a prescribed value.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18010687A JPS6424638A (en) | 1987-07-21 | 1987-07-21 | Automatic equalizing circuit |
EP88111686A EP0300449B1 (en) | 1987-07-21 | 1988-07-20 | Digital automatic line equalizer with means for controlling tap gains of transversal filter on mean power of output from the filter |
DE3889990T DE3889990T2 (en) | 1987-07-21 | 1988-07-20 | Digital automatic line equalizer with means for regulating the tap gain depending on the average filter output power. |
CA000572497A CA1276246C (en) | 1987-07-21 | 1988-07-20 | Digital automatic line equalizer for communication system |
US07/222,482 US4872184A (en) | 1987-07-21 | 1988-07-21 | Digital automatic line equalizer with means for controlling tap gains of transversal filter based on mean power of output from the filter |
AU19267/88A AU608190B2 (en) | 1987-07-21 | 1988-07-21 | Digital automatic line equalizer with means for controlling tap gains of transversal filter based on mean power of output from the filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18010687A JPS6424638A (en) | 1987-07-21 | 1987-07-21 | Automatic equalizing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6424638A true JPS6424638A (en) | 1989-01-26 |
Family
ID=16077527
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18010687A Pending JPS6424638A (en) | 1987-07-21 | 1987-07-21 | Automatic equalizing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6424638A (en) |
-
1987
- 1987-07-21 JP JP18010687A patent/JPS6424638A/en active Pending
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