Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2006-03-21
2006-03-21
Deppe, Betsy L. (Department: 2637)
Pulse or digital communications
Transmitters
Antinoise or distortion
Reexamination Certificate
active
07016431
ABSTRACT:
A transmitter for sending signals over wireless channels and a method of sending signals over wireless channels are described. The transmitter and the method are used to determine a transfer characteristic of an amplifier (8) in the transmitter. Test signals are input at preset times into OFDM signals to be transmitted, and then test signals amplified by the amplifier (8) are compared with test signals buffered in a measurement module (12) to determine the transfer characteristic of the amplifier (8). This transfer characteristic of the amplifier (8) is used by a predistorter (4) to predistort the signals according to this transfer characteristic. The test signal generated by a signal generator (13) is input into a synchronization symbol, with the amplitude of the test signal being increased incrementally or being large enough to determine the transfer properties of the amplifier (8). The test signal has an envelope which is not dependent on time.
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Harms Lars
Hentati Nabil
Lochau Mirko
Schrader Marc
Deppe Betsy L.
Kenyon & Kenyon
Robert & Bosch GmbH
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