Telecommunications – Transmitter – Amplitude modulation
Reexamination Certificate
2006-08-30
2009-11-17
Le, Thanh C (Department: 2618)
Telecommunications
Transmitter
Amplitude modulation
C455S127100, C375S295000
Reexamination Certificate
active
07620377
ABSTRACT:
Systems and methods for increasing bandwidth capability of an envelope elimination and restoration (EER) transmitter. A frequency response of a power supply modulator of the transmitter is approximated. An inverse response is applied to the envelope signal prior to digital-to-analog conversion (DAC) and before the signal reaches the power supply modulator to pre-emphasize the signal thereby counteracting distorting affects of the modulator. The filter is implemented using any of a variety of different digital techniques including programmable logic, DSP, etc.
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General Dynamics C4 Systems
Hunton & Williams LLP
Le Thanh C
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