Pulse or digital communications – Transmitters – Angle modulation
Patent
1990-12-20
1996-02-27
Tse, Young T.
Pulse or digital communications
Transmitters
Angle modulation
375303, H04L 2720, H04L 2712
Patent
active
054955050
ABSTRACT:
A direct digital frequency synthesizer increases the frequency resolution of the analog output signal by using fractionalization techniques. The best integer value I.sub.FR of a digital signal is determined and the next integer value I.sub.FR +1 of a digital signal is used to determine a weighted fractionalized value of the digital signal. The fractionalized value of the digital signal is used to synthesize the analog output signal having increased frequency resolution. In addition, IFR and IFR+1 are optimally distributed during the weighting process to ensure a minimum cumulative phase error.
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Motorola Inc.
Sonnentag Richard A.
Tse Young T.
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