Patent ID: 8102942
Filing Date: 2012-01-24
Classification: H03D,H04L

Abstract:
1. A vestigial sideband (VSB) modulation apparatus comprising: a signal processing unit which extracts an in-phase axis data signal component and a quadrature axis data signal component from a baseband signal with symbol data superimposed thereon; a band-limiting filter which limits a passband width of the in-phase axis data signal component and the quadrature axis data signal component, extracted by the signal processing unit, by a frequency width smaller than a rate of the symbol data and frequency-shifts the in-phase axis data signal component and the quadrature axis data signal component by only a specific frequency corresponding to a half of the frequency width; wherein when the rate of the symbol data is represented by f a quadrature modulating unit which obtains a VSB modulation signal by quadrature-modulating the in-phase axis data signal component and the quadrature axis data signal component output from the band-limiting filter.