Polar modulation without analog filtering

Details Polar modulation without analog filtering Polar modulation without analog filtering

2007-09-14

2009-11-17

Pascal, Robert (Department: 2817)

Modulators

Phase modulator

Including amplitude modulator

C332S152000, C375S302000, C455S102000

Reexamination Certificate

active

07619487

ABSTRACT:
This disclosure relates to systems and methods for polar modulation without analog filters. Digitals filters, a second order hold interpolator and a reconfigurable third order noise shaper can be used instead of the analog filters used in conventional polar modulators. The polar modulator receives either receives the input in polar coordinates or converts the signal into polar phase and amplitude components. The phase and amplitude components are processed separately using digital signal processing components including digital filters, PLL, interpolator and noise shaper. The processed phase and amplitude components are then mixed to generate the modulated signal.

REFERENCES:
patent: 7447272 (2008-11-01), Haglan
patent: 7522658 (2009-04-01), Jensen
patent: 2008/0064343 (2008-03-01), Lewis

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