Mechanism for modulating wireless communication signals

Details Mechanism for modulating wireless communication signals Mechanism for modulating wireless communication signals

2006-06-06

2006-06-06

Nguyen, Duc (Department: 2643)

Telecommunications

Transmitter

Carrier amplitude control

C341S120000, C341S147000, C455S239100

Reexamination Certificate

active

07058371

ABSTRACT:
A modulating mechanism is provided comprising a first storage and a corresponding first DAC, and a second storage and a corresponding second DAC. The first storage stores an adjusted digital representation of a first waveform, while the second storage stores an adjusted digital representation of a second waveform. The adjusted representation of the first waveform is adjusted to compensate for the deviation effects experienced by the first DAC (e.g. amplitude deviation, DC offset, non-linearity, etc.). The adjusted representation of the second waveform is adjusted to compensate for the deviation effects experienced by the second DAC. In effect, the adjusted representations of the first and second waveforms cause the DAC's to exhibit the proper behavior, despite the presence of the deviation effects. By storing and using adjusted digital representations of waveforms in this manner, many benefits can be realized, including for example, eliminating the need for any analog compensation circuits.

REFERENCES:
patent: 5087914 (1992-02-01), Sooch et al.
patent: 5321401 (1994-06-01), White
patent: 6054896 (2000-04-01), Wright et al.
patent: 6385233 (2002-05-01), Berger

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