SU99908A1 - Device to reduce the level of interference: in the communication channel - Google Patents
Device to reduce the level of interference: in the communication channelInfo
- Publication number
- SU99908A1 SU99908A1 SU449221A SU449221A SU99908A1 SU 99908 A1 SU99908 A1 SU 99908A1 SU 449221 A SU449221 A SU 449221A SU 449221 A SU449221 A SU 449221A SU 99908 A1 SU99908 A1 SU 99908A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- interference
- communication channel
- level
- reduce
- signal
- Prior art date
Links
Landscapes
- Noise Elimination (AREA)
Description
Изобретение относитс к области устройств, предназначенных дл повышени качества воспроизведени передаваемой информации на выходе канала св зи путем уменьшени уровн сплошных помех.The invention relates to the field of devices designed to improve the quality of reproduction of transmitted information at the output of a communication channel by reducing the level of continuous interference.
В известных устройствах, в которых дл уменьшени помех в канале св зи производитс деление низкочастотного диапазона передаваемых сигналов при помоши системы полосовых фильтров с последуюш,им ограничением сигнала по минимуму после каждого фильтра, имеют место нелинейные искажени , вносимые ограничител ми.In the known devices, in order to reduce interference in the communication channel, the low-frequency range of the transmitted signals is divided with the help of a bandpass filter system followed by limiting the signal to the minimum after each filter, there are nonlinear distortions introduced by the limiters.
Предлагаетс устройство, в котором предусматриваетс уменьшение указанных искажений.A device is proposed which provides for the reduction of said distortions.
Принцип действи устройства основан на использовании влени неравномерного , мен ющегос во времени распределени энергии сигнала по спектру частот. Поэтому дл передачи информации по тракту св зи нет необходимости в наличии широкой полосы тракта во все врем передачи . Чтобы не пропустить на выход тракта большую долю энергии помехи, распределенной по спектруThe principle of operation of the device is based on the use of the uneven, time-varying distribution of signal energy over the frequency spectrum. Therefore, to transmit information over the communication path, it is not necessary to have a wide path band throughout the transmission. In order not to miss a large portion of the interference energy distributed over the spectrum at the output of the path
достаточно равномерно, и тем увеличить отношение сигнал/помеха, в описываемом устройстве предусматриваетс возможность перекрывать те участки полосы, которые в данный момент не св заны с передачей сигнала.sufficiently evenly, and thus to increase the signal-to-noise ratio, in the described device it is possible to overlap those parts of the band that are not currently associated with signal transmission.
Схема и принцип действи устройства по сн ютс чертежом.The design and operation of the device is illustrated in the drawing.
Полосовые фильт ры 1, 2, 3 к 4 включены в низкочастотный тракт приемника; они дел т частотный диапазон передаваемого сигнала на отдельные примыкаюш,ие одна к другой полосы. Па выходе каждого фильтра включены ограничители по минимуму 5, 6, 7 R 8. Папр жени с выходов этих ограничителей подаютс на элемент сложени 9. Кроме того , в низкочастотный тракт приемника включены гетеродин 10 и два преобразовател частоты // и 12. Суммарный сигнал с выхода преобразовател 12 поступает через усилитель 13 в соответствуюш ее оконечное устройство 14.Band-pass filters 1, 2, 3 and 4 are included in the low-frequency path of the receiver; they divide the frequency range of the transmitted signal into separate adjoining, one to another bands. Pa of the output of each filter included limiters for a minimum of 5, 6, 7 R 8. The outputs from the outputs of these limiters are fed to the addition element 9. In addition, the local oscillator 10 and two frequency converters // and 12 are included in the low-frequency path of the receiver. the output of the converter 12 enters through the amplifier 13 into its corresponding terminal device 14.
В каждый момент сигнал пройдет только через те фильтры, в которых уровень сигнала превосходит порог ограничени . При этом из сигналаAt each moment, the signal will pass only through those filters in which the signal level exceeds the limit threshold. With this from the signal
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU449221A SU99908A1 (en) | 1954-05-15 | 1954-05-15 | Device to reduce the level of interference: in the communication channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU449221A SU99908A1 (en) | 1954-05-15 | 1954-05-15 | Device to reduce the level of interference: in the communication channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU99908A1 true SU99908A1 (en) | 1954-11-30 |
Family
ID=48374066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU449221A SU99908A1 (en) | 1954-05-15 | 1954-05-15 | Device to reduce the level of interference: in the communication channel |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU99908A1 (en) |
-
1954
- 1954-05-15 SU SU449221A patent/SU99908A1/en active
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