QUADRATURE MODULATOR WITH ONE SIDEBAND

摘要

The invention relates to the units of data transmission systems and can be used in both digital and analogue signal transmission systems using a method of quadrature modulation with one side band. In the basis of the invention a task is set: creation of a modulation device for modulation (manipulation) of in-phase and quadrature signals using a method of quadrature modulation with one sideband (low or upper). Chose of the low or upper sideband is made by means of a control signal supplied to the unit separately. The technical result is reducing one sideband in the initial signal that provides twofold reduction of the spectral band of output signal in comparison to standard quadrature modulation.