Telecommunications – Transmitter – Noise or interference elimination
Reexamination Certificate
2004-04-02
2008-08-19
Nguyen, Tony T (Department: 2618)
Telecommunications
Transmitter
Noise or interference elimination
C455S114200, C455S130000, C455S341000
Reexamination Certificate
active
07415252
ABSTRACT:
A system and a method create a pre-distorted signal y(k) from an interpolated broadband baseband signal x(k) for a transmitter power amplifier having at least three branches to which the signal x(k) is respectively connected on the input side. A first branch contains a distortion device for taking into account memory effects of the transmitter power amplifier to which the signal x(k) is supplied on the input side. Where 2=j=n, each other j-th branch contains the following serially mounted elements: a deceleration device with a signal x(k) supplied on the input side, a first adder, a digital low-pass filter, and a second adder, the output signal formed by the second adder being used to create the pre-distorted signal y(k). The distortion device pertaining to the first branch is connected, on the input side, to another input of the second adder of the second branch, and on the output side, to another input of the first adder of the second branch.
REFERENCES:
patent: 6549067 (2003-04-01), Kenington
patent: 2002/0027961 (2002-03-01), Rexberg et al.
patent: 2002/0181549 (2002-12-01), Linnartz et al.
patent: 02/39687 (2002-05-01), None
Nguyen Tony T
Nokia Siemens Networks GmbH & Co. KG
Staas & Halsey , LLP
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