Telecommunications – Transmitter – Noise or interference elimination
Reexamination Certificate
2009-03-27
2011-11-08
Nguyen, Long (Department: 2816)
Telecommunications
Transmitter
Noise or interference elimination
C455S126000, C455S127200
Reexamination Certificate
active
08055217
ABSTRACT:
Symbols are transmitted in a Cartesian transmitter by pre-distorting an input signal X having in-phase and quadrature components using a first compensation lookup table operable to hold complex valued entries to carry out in-phase and quadrature compensation pre-distortion with respect to the input signal to form a pre-distorted signal Z. The pre-distorted signal Z is processed to form an output signal Y using a nonlinear element. A complex gain normalization parameter adaptively updated to reflect varying gain of a linear region of the nonlinear element. A normalized feed back signal {tilde over (Y)} is formed using the adaptively updated complex gain normalization parameter. The first compensation lookup table is updated based on the pre-distorted input signal Z and the adaptively normalized feedback signal {tilde over (Y)}.
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Ba Seydou Nourou
Waheed Khurram
Brady III Wade James
Neerings Ronald O.
Nguyen Long
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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