Telecommunications – Transmitter – Measuring – testing – or monitoring of transmitter
Reexamination Certificate
2006-06-27
2006-06-27
Trinh, Sonny (Department: 2687)
Telecommunications
Transmitter
Measuring, testing, or monitoring of transmitter
C455S115200, C455S501000
Reexamination Certificate
active
07068982
ABSTRACT:
The present invention provides a method for determining nonlinear distortion of a transmitter. A test symbol sequence is transmitted from the transmitter under test as an analog output signal. The analog output signal is sampled to produce a first sequence which represents the test symbol sequence as distorted by a linear distortion sequence and a nonlinear distortion sequence. The test symbol sequence is filtered via an adaptive filter to produce a second sequence such that the second sequence is approximately equal to the test symbol sequence as distorted by the linear distortion sequence. The second sequence is subtracted from the first sequence to produce an output sequence substantially equal to the nonlinear distortion sequence.
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Agazzi Oscar E.
Creigh John L.
McAndrews Held & Malloy Ltd.
Trinh Sonny
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