JPS561634A - Equalizer - Google Patents
EqualizerInfo
- Publication number
- JPS561634A JPS561634A JP7781379A JP7781379A JPS561634A JP S561634 A JPS561634 A JP S561634A JP 7781379 A JP7781379 A JP 7781379A JP 7781379 A JP7781379 A JP 7781379A JP S561634 A JPS561634 A JP S561634A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- distortion
- delay
- homega
- 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
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/015—Reducing echo effects
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Filters And Equalizers (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
Abstract
PURPOSE:To secure the safe elimination of the amplitude distortion and the delay distortion which are caused by the multipath propagation, by selecting properly the attenuation factor, the phase transition amount and the delay amount each. CONSTITUTION:The input signal at signal input terminal 11 is referred to as Ei, and the output signal at signal output terminal 18 is as Eo each. Thus in order to turn signal Ei receiving the multipath distortion into nondistortion signal Eio, the transmission function Homega of the circuit is set so as to secure Homega=1 in relation to Eo=HomegaXEi. For this purpose, attenuation factor (k) of attenuation circuit 13 is set equal to amplitude ratio (g) of the reflected wave to the main wave. And the equation of omegagamma+phi=omegalambda is satisfied, where the delay time of delay circuit 16 is gamma, the phase transition amount of phase-shift circuit 17 is phi, the propagation time difference is lambda between the main wave and the reflected wave, and the angle frequency is omega respectively. As a result, the signal which is perfectly free from the distortion can be obtained. The amplification factor of amplifying circuit 15 is set to 1/k.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7781379A JPS561634A (en) | 1979-06-20 | 1979-06-20 | Equalizer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7781379A JPS561634A (en) | 1979-06-20 | 1979-06-20 | Equalizer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS561634A true JPS561634A (en) | 1981-01-09 |
Family
ID=13644455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7781379A Pending JPS561634A (en) | 1979-06-20 | 1979-06-20 | Equalizer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS561634A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6043928A (en) * | 1983-08-20 | 1985-03-08 | Fujitsu Ltd | Automatic frequency distortion compensating device |
JPS60142630A (en) * | 1983-12-28 | 1985-07-27 | Fujitsu Ltd | Compensating device of propagation distorsion |
US7974799B2 (en) | 2006-02-14 | 2011-07-05 | Fujitsu Limited | Backboard transmission method, backboard transmission apparatus, and substrate unit |
-
1979
- 1979-06-20 JP JP7781379A patent/JPS561634A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6043928A (en) * | 1983-08-20 | 1985-03-08 | Fujitsu Ltd | Automatic frequency distortion compensating device |
JPS60142630A (en) * | 1983-12-28 | 1985-07-27 | Fujitsu Ltd | Compensating device of propagation distorsion |
US7974799B2 (en) | 2006-02-14 | 2011-07-05 | Fujitsu Limited | Backboard transmission method, backboard transmission apparatus, and substrate unit |
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