Telecommunications – Transmitter – Noise or interference elimination
Reexamination Certificate
2011-06-14
2011-06-14
Le, Lana N (Department: 2614)
Telecommunications
Transmitter
Noise or interference elimination
C455S127100, C455S501000
Reexamination Certificate
active
07962108
ABSTRACT:
A system and method for calibrating Amplitude Modulation to Phase Modulation (AM/PM) compensation circuitry in a mobile terminal operating according to a polar modulation scheme are provided. In general, during ramp-up for a transmit burst, measurements of a phase error between an input and output of power amplifier circuitry in the transmit chain are obtained. Using the phase error measurements, the AM/PM compensation circuitry is calibrated and used to provide AM/PM compensation for the same transmit burst. By calibrating the AM/PM compensation circuitry using the phase error measurements obtained during ramp-up, the AM/PM compensation circuitry is calibrated for the desired frequency band, sub-band, and power control level setting as well as for the current load conditions at the antenna and ambient temperature.
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Granger-Jones Marcus
Hietala Alexander Wayne
Khlat Nadim
Le Lana N
RF Micro Devices, Inc.
Withrow & Terranova, P.L.L.C.
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