FIELD: radio engineering; data transmission systems. SUBSTANCE: additional digital information is transmitted in desired frequency band designed for transmitting analog signal using narrow-band modulation methods by means of broad-band phase-keyed signal. Equipment includes low-frequency amplifier, modulator, exciter, power amplifier, transmitting antenna, two frequency synthesizers, receiving antenna, high-frequency amplifier, intermediate-frequency channel, broad-band phase-keyed signal shaper and receiver, two delay circuits, switch, four multipliers, rejection filter, two adders, and demodulator. EFFECT: enhanced noise immunity, ability of transparent data transmission and narrow-band signal masking, enlarged amount of data transmitted. 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DIGITAL AND ANALOG DATA TRANSMISSION EQUIPMENT | 2001 |
|
RU2205509C2 |
| TRANSCEIVING DEVICE | 2001 |
|
RU2204206C2 |
| TRANSCEIVING DEVICE | 2001 |
|
RU2205508C2 |
| DATA TRANSMITTING AND RECEIVING EQUIPMENT | 2001 |
|
RU2188504C1 |
| TRANSCEIVER DEVICE | 2000 |
|
RU2187888C1 |
| DATA TRANSMISSION METHOD | 2001 |
|
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| BROADBAND-SIGNAL COMMUNICATION SYSTEM | 2002 |
|
RU2210860C1 |
| STRUCTURAL NOISE SUPPRESSION DEVICE | 2001 |
|
RU2209512C2 |
| RADIO TRANSMISSION LINE USING PHASE-KEYED NOISE- LIKE SIGNALS | 1999 |
|
RU2156541C1 |
| DEVICE FOR SUPPRESSING BROADBAND PHASE-KEYED NOISE | 2001 |
|
RU2204202C2 |
