Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2007-05-01
2007-05-01
Ghayour, Mohammed (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
C375S261000
Reexamination Certificate
active
10305406
ABSTRACT:
The invention relates to a radio transmitter using QAM modulation, comprising a first transmit filter for filtering data symbols to be transmitted to form a waveform, means for comparing the waveform to a predetermined threshold value, means for clipping power peaks that exceed the predetermined threshold value from the waveform to form a clipped waveform, means for multiplying the clipped power peaks with an impulse response of a receive filter to form an impaired signal, means for subtracting the impaired signal from the data symbols to be transmitted to form subtracted data symbols, a second transmit filter for filtering the reduced data symbols to form a modulated signal, and means for up-converting the modulated signal to a transmission frequency.
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Ghayour Mohammed
Nokia Corporation
Squire Sanders & Dempsey L.L.P.
Vlahos Sophia
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