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RU95100814A - Method of multichannel signal transmission - Google Patents

Method of multichannel signal transmission

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Publication number
RU95100814A
RU95100814A RU95100814/09A RU95100814A RU95100814A RU 95100814 A RU95100814 A RU 95100814A RU 95100814/09 A RU95100814/09 A RU 95100814/09A RU 95100814 A RU95100814 A RU 95100814A RU 95100814 A RU95100814 A RU 95100814A
Authority
RU
Russia
Prior art keywords
signals
frequency
carriers
channel
carrier
Prior art date
Application number
RU95100814/09A
Other languages
Russian (ru)
Other versions
RU2090975C1 (en
Inventor
В.И. Пономарев
Original Assignee
Санкт-Петербургский государственный университет телекоммуникаций им.проф.М.А.Бонч-Бруевича
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Санкт-Петербургский государственный университет телекоммуникаций им.проф.М.А.Бонч-Бруевича filed Critical Санкт-Петербургский государственный университет телекоммуникаций им.проф.М.А.Бонч-Бруевича
Priority to RU95100814A priority Critical patent/RU2090975C1/en
Publication of RU95100814A publication Critical patent/RU95100814A/en
Application granted granted Critical
Publication of RU2090975C1 publication Critical patent/RU2090975C1/en

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  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

FIELD: electric communication, design of analog multichannel transmission systems. SUBSTANCE: for transmission channel signals are multiplied by harmonic ones carrying oscillations, obtained signals are summed up and transmitted over common path. At reception side for extraction of channel signals common signal is multiplied by pure oscillations of same frequencies and is filtered. During transmission each of N=2channel signals is simultaneously multiplied by n+K (n=1,2,...; K=0,1,2,...) harmonic carriers. Frequency of one them is greater than maximum frequency of channel signals, frequency of each next one is twice as great as previous one, frequencies of last carrier are twice or more than twice greater than frequencies of previous carrier. Phase of each carrier has one of two possible values differing by value nonmultiple of 180 deg. Phases for different signals, at least of K+1 carriers are different. At reception side common signal is simultaneously multiplied by n+k carriers of same frequencies to extract definite channel signal. If during transmission phases of given channel signal have one of two mentioned possible values then during reception phases of carriers differ by 90 deg from other possible value. EFFECT: provision for equal transmission conditions for all channel signals in common path without any substantial expansion of spectrum characteristic of digital transmission systems, simplification of equipment realizing given method.

Claims (1)

Изобретение относится к электрической связи, в частности к многоканальной связи, и может использоваться при создании аналоговых многоканальных систем передачи. Целью изобретения является обеспечение одинаковых условий передачи всех канальных сигналов в общем тракте и улучшение частотных характеристик каналов без существенного расширения спектра, свойственного цифровым системен передачи, а также упрощение аппаратуры, реализующей данный способ. Данная задача решается способом, при котором на передаче канальные сигналы умножают на гармонические несущие колебания, полученные сигналы суммируют и передают в общем тракте, а на приеме для выделения канальных сигналов общий сигнал умножают на несущие колебания тех же частот и фильтруют, отличающимся тем, что не передаче каждый из N = 2n канальных сигналов умножают одновременно на n + К (n = 1, 2,...; К = 0, 1, 2,...) гармонических несущих, частота одной из которых больше максимальной частоты канальных сигналов, частота каждой следующей вдвое больше частоты предыдущей, частоты последней несущей вдвое или более чем вдвое больше частоты предыдущей, а фаза каждой несущей имеет одно из двух возможных значений, отличающихся на величину, некратную 180o, причем для разных канальных сигналов фазы по крайней мере К+1 несущих различны, а на приеме для выделения определенного канального сигнала умножают общий сигнал одновременно на n + К несущих тех же частот, причем если на передаче фазы несущих данного канального сигнала имеют одно из упомянутых двух возможных значений, то на приеме фазы несущих отличаются на 90° от другого возможного значения.The invention relates to electrical communication, in particular to multi-channel communication, and can be used to create analog multi-channel transmission systems. The aim of the invention is to provide the same conditions for the transmission of all channel signals in a common path and to improve the frequency characteristics of the channels without significantly expanding the spectrum inherent in digital transmission systems, as well as simplifying the apparatus implementing this method. This problem is solved by a method in which the channel signals are multiplied by harmonic carrier oscillations in the transmission, the received signals are summed and transmitted in the common path, and the received signal is multiplied by the carrier signals of the same frequencies and filtered, which differs by not each N = 2 n channel signals are multiplied simultaneously by n + K (n = 1, 2, ...; K = 0, 1, 2, ...) harmonic carriers, the frequency of one of which is greater than the maximum frequency of the channel signals , the frequency of each subsequent is twice more than h The frequency of the previous carrier, the frequency of the last carrier is twice or more than twice the frequency of the previous one, and the phase of each carrier has one of two possible values that differ by a factor of 180 ° , and for different channel signals the phases of at least K + 1 carriers are different, and at the reception, to isolate a specific channel signal, the total signal is simultaneously multiplied by n + K carriers of the same frequencies, and if at the phase transmission of the carriers of this channel signal they have one of the two possible values, then at the reception of the carrier phase tlichayutsya 90 ° from the other possible values.
RU95100814A 1995-01-13 1995-01-13 Multichannel signal transmission technique RU2090975C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU95100814A RU2090975C1 (en) 1995-01-13 1995-01-13 Multichannel signal transmission technique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU95100814A RU2090975C1 (en) 1995-01-13 1995-01-13 Multichannel signal transmission technique

Publications (2)

Publication Number Publication Date
RU95100814A true RU95100814A (en) 1996-11-10
RU2090975C1 RU2090975C1 (en) 1997-09-20

Family

ID=20164133

Family Applications (1)

Application Number Title Priority Date Filing Date
RU95100814A RU2090975C1 (en) 1995-01-13 1995-01-13 Multichannel signal transmission technique

Country Status (1)

Country Link
RU (1) RU2090975C1 (en)

Also Published As

Publication number Publication date
RU2090975C1 (en) 1997-09-20

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