Patent ID: 7167528
Filing Date: 2007-01-23
Classification: H03C

Abstract:
1. A modulation system for modulating data onto a carrier signal in a plurality of channels, each of said channels having a channel bandwidth, said system comprising: a digital modulator outputting a modulated baseband signal; an intermediate frequency modulator that receives said modulated baseband signal and outputs an intermediate frequency signal derived from said modulated baseband signal; a frequency synthesizing system outputting a synthesized intermediate frequency signal to said intermediate frequency modulator; and a circuit connected to said digital modulator, said circuit providing a signal to said digital modulator, said signal having a frequency including an offset that allows said frequency synthesizing system and intermediate frequency modulator to make frequency steps equal to said channel bandwidth, wherein said circuit comprises a numerically controlled oscillator and said numerically controlled oscillator receives a data signal, said offset being based on said data signal.