Purpose of the development: To study changes in the parameters of digital television signals of DVB-C / T / 2 standards when transmitting them via a radio relay link using the dual (combined) modulation method QAM-FM or COFDM-FM.

Recommended application field: Broadcasting, radio and television.

Technical characteristic: - modem input: DVB-C or DVB-T, DVB-T2; - input frequency band: 8 MHz; - combined modulation: QAM-FM (for DVB-C), COFDM-FM (for DVB-T / T2); - bandwidth of the combined modulation radio signal: 27 MHz; - RRL interval length: 15 km; - speed of a digital stream: no more than 50 Mbps.

Advantages over analogues: - the stability of the radio signal of combined modulation to the effects of nonlinear distortion in the transmitting and receiving paths; - high noise immunity of the radio relay communication line; - increased spectral efficiency of radio frequency band use; - the minimum cost of upgrading the equipment of the existing radio relay line.

The development stage readiness: Pre-production model is made

Description of the development:
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The development is based on the combined (dual) modulation method proposed by the authors, in which digital cam- or COFDM modulation is used as the primary, and analog frequency modulation is used as the secondary, which allows a significant increase in the amount of information transmitted via the existing backbone radio links.

Information about newness of the development:
there are Ukrainian patents -- 2 items

corresponds technical description
Guarantees stable results getting

Possibility of transfer abroad:
Combinated reduction to industrial level
Joint production, sale, exploitation

Photo

Country Ukraine

For additional information turn to:
E-mail: gal@uintei.kiev.ua