MITRIS SYSTEM WITH COMBINED QUADRATURE-AMPLITUDE AND FREQUENCY MODULATION

Teodor N. Narytnyk

Institute of Electronics and Communications of the Ukrainian Academy of Sciences, Kyiv, Ukraine

The telecast and Internet distribution system, which use combined two-level modulation and intended for digital information transfer in frequency band 11,7─12,5 GHz was created on a base of the existing microwave integrated telecommunication system MІTRІS. In comparison with telecommunication system using 64-QAM modulation with one carrier, new system has significantly better power engineering, less hard requirements to the frequency stability, to the phase noise level and to the linear-
ity of the amplitude-frequency and phase-frequency characteristics of communication channel.

Українська
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