Dual-mode modulation systems and methods including oversampling

Details Dual-mode modulation systems and methods including oversampling Dual-mode modulation systems and methods including oversampling

1997-11-17

2000-10-24

Pham, Chi H.

Pulse or digital communications

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375295, 375298, 455104, H04L 2730

Patent

active

061378267

ABSTRACT:
A narrow bandwidth signal, such as a narrowband FM signal, is modulated in a modulator that modulates a wide bandwidth signal, such as a CDMA signal, by oversampling the narrow bandwidth signal and applying the oversampled narrow bandwidth signal to the modulator. By oversampling the narrow bandwidth signal, the same fixed low pass filter can be used for both the wide bandwidth signal and the oversampled narrow bandwidth signal. Accordingly, different low pass filters or switched low pass filters are not needed.

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