Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2008-06-20
2011-11-08
Payne, David C. (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
Reexamination Certificate
active
08054912
ABSTRACT:
A predistorters for use with a nonlinear element and methods of predistorting for a nonlinear element for use in a 3G, e.g., WCDMA transmitter. In one embodiment, the predistorter includes: (1) a lookup table having non-uniformly spaced entries therein, (2) a compander configured to compand an input signal based on a nonlinearity of the nonlinear element to address the entries and (3) an interpolation offset calculation circuit associated with the lookup table and configured to produce an output based on a value of the input signal and a linear interpolation involving at least two entries from the lookup table.
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Ba Seydou N.
Waheed Khurram
Brady III Wade James
File Erin
Neerings Ronald O.
Payne David C.
Telecky , Jr. Frederick J.
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