SU725249A1 - Method of radio communication through parallel channels with frequency-modulated signals - Google Patents
Method of radio communication through parallel channels with frequency-modulated signals Download PDFInfo
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- SU725249A1 SU725249A1 SU782660862A SU2660862A SU725249A1 SU 725249 A1 SU725249 A1 SU 725249A1 SU 782660862 A SU782660862 A SU 782660862A SU 2660862 A SU2660862 A SU 2660862A SU 725249 A1 SU725249 A1 SU 725249A1
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- USSR - Soviet Union
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- frequency
- radio communication
- modulated signals
- parallel channels
- signals
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Description
редача частотномодулированных сигналов осуществл етс передатчиками 5, 6 обоих каналов. При этом произведение девиации частоты на длительность посылки в каждом капале устаиавливают равньш 0,125- 0,25, т. е. вдвое ниже, чем при реализации известных способов. Это позвол ет сократить полосу занимаемых двум каналами частот примерно на 12-15%.The transmission of frequency-modulated signals is carried out by the transmitters 5, 6 of both channels. At the same time, the product of the frequency deviation for the duration of the parcel in each channel is set equal to 0.125-0.25, i.e., twice lower than when implementing the known methods. This reduces the bandwidth occupied by the two channels by about 12-15%.
Сигналы, переданные через линии 7, 8 св зи, принимаютс линейными приемниками 9, 10 и поступают в блок 11. В этом блоке устран етс сдвиг фазы в каиалах передачи и приема и сигналы оказываютс сфазированными по фазе и частоте применительно к немодулированной несущей частоте .. Signals transmitted via links 7, 8 are received by line receivers 9, 10 and fed to block 11. In this block, the phase shift in transmit and receive kiaals is eliminated and the signals are phased in frequency and frequency as applied to the unmodulated carrier frequency.
Особенностью блока 11 при использовании за вл емого способа вл етс то, что он только устран ет неопределенность фазы , но не суммирует прин тые сигналы. Поэтому он имеет два выхода. Сигнал канала с инвертированным модулирующим сигналом сдвигаетс по фазе на /2 в фазовращателе 12 и подаетс иа один вход фазового демодул тора 13, на другой вход которого поступает сигнал канала с неинвертированным модулирующим сигналом. В фазовом демодул торе 13 выполн ютс совместно операции комбинировани прин тых сигналов и их демодул ции. Далее информационный сигнал поступает в получатель 14.A feature of block 11 when using the claimed method is that it only eliminates the phase uncertainty, but does not summarize the received signals. Therefore, it has two choices. The channel signal with the inverted modulating signal is shifted in phase by / 2 in the phase shifter 12 and one input is supplied to the phase demodulator 13, to the other input of which a channel signal with a non-inverted modulating signal is received. In phase demodulator 13, operations of combining received signals and their demodulation are performed jointly. Next, the information signal enters the receiver 14.
Пабег фазы за длительность посылки сот:Paffeg phase for the duration of sending cells:
ставит (-г- ), что позвол ет использоватьputs (-g-), which allows use
противоположные сигналы при интегрировании как по всей длительности посылки, так и по ее части. Таким образом, как и при некогерентном приеме сигналов с оптимальными параметрами при использовании известных способов, предложенный способ позвол ет обеспечить потенциальную помехоустойчивость, сокраща при этом полосу занимаемых частот.opposite signals when integrating both over the entire duration of the package and over its part. Thus, as with non-coherent reception of signals with optimal parameters using well-known methods, the proposed method allows one to ensure potential noise immunity while reducing the occupied frequency band.
Этот способ радиосв зи может быть применен в системах разнесенного приема при разнесении сигналов по частоте, пространству и особенно при разнесении по пол ризации , а также в системах, использующих многочастотиые сигналы с дополнительной частотной модул цией. При этом могут передаватьс как аналоговые, так и цифровые сигналы.This method of radio communication can be applied in diversity systems in the separation of signals in frequency, space, and especially in polarization diversity, as well as in systems using multi-frequency signals with additional frequency modulation. In this case, both analog and digital signals can be transmitted.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782660862A SU725249A1 (en) | 1978-08-15 | 1978-08-15 | Method of radio communication through parallel channels with frequency-modulated signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782660862A SU725249A1 (en) | 1978-08-15 | 1978-08-15 | Method of radio communication through parallel channels with frequency-modulated signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU725249A1 true SU725249A1 (en) | 1980-03-30 |
Family
ID=20783898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU782660862A SU725249A1 (en) | 1978-08-15 | 1978-08-15 | Method of radio communication through parallel channels with frequency-modulated signals |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU725249A1 (en) |
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1978
- 1978-08-15 SU SU782660862A patent/SU725249A1/en active
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