Telecommunications – Transmitter – Measuring – testing – or monitoring of transmitter
Reexamination Certificate
2011-07-26
2011-07-26
Le, Nhan (Department: 2618)
Telecommunications
Transmitter
Measuring, testing, or monitoring of transmitter
C455S226100, C455S550100
Reexamination Certificate
active
07986925
ABSTRACT:
A technique for calibrating a transceiver of a wireless communication device includes selectively coupling an output node of a transmitter of the transceiver to an input node of a receiver of the transceiver. A calibration signal is provided, from the output node of the transmitter, to the input node of the receiver. The calibration signal is down-converted, with the receiver, to provide a down-converted calibration signal. A discrete Fourier transform is performed on the down-converted calibration signal. Finally, one or more correction factors are determined based on an analysis of the discrete Fourier transform of the down-converted calibration signal. At least one of the correction factors is utilized to facilitate substantial cancellation of a direct current offset associated with the transceiver.
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Alford Ronald C.
Dehner Leo G.
Meador Richard B.
Rotchford Christian J.
Freescale Semiconductor Inc.
Le Nhan
Yudell Isidore Ng Russell PLLC
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