MULTICHANNEL TRANSMITTER FOR SPECTRALLY EFFICIENT RADIO COMMUNICATION SYSTEM

摘要

FIELD: radio engineering, communication.;SUBSTANCE: multichannel transmitter for a spectrally efficient radio communication system comprises N information channels, K call channels and J service channels, wherein N+K+J=L is the total number of channels of the transmitter, as well as a clock generator, a carrier frequency generator, a channel signal adder, a nonlinear masking sequence generator, a nonlinear orthogonal code generator and a frequency divider. The circuit of each channel of the transmitter includes a channel signal spectrum former, which comprises first and second M-ary amplitude-phase modulators, first and second multipliers, first and second low-pass filters, first and second phase modulators, first and second band-pass filters and an adder.;EFFECT: high spectral efficiency of transmitting information in communication systems.;2 cl, 2 dwg