Telecommunications – Transmitter – Amplitude modulation
Reexamination Certificate
2011-08-02
2011-08-02
Nguyen, Duc M (Department: 2618)
Telecommunications
Transmitter
Amplitude modulation
C455S110000, C455S114300, C375S298000, C375S300000, C332S145000, C332S159000, C330S149000
Reexamination Certificate
active
07991366
ABSTRACT:
Methods and apparatus for reconstructing discrete-time amplitude modulation signals in polar modulation transmitters. An exemplary polar modulation transmitter includes a symbol generator, a rectangular-to-polar converter, a peak phase detector, and an amplitude modulation reconstruction circuit. The symbol generator generates rectangular-coordinate modulation symbols from which the rectangular-to-polar converter generates an amplitude modulation signal containing discrete-time amplitude samples and an angle modulation signal containing discrete-time angle samples. The peak phase detector circuit detects phase reversals or near phase reversals represented in samples of the angle modulation signal. The amplitude modulation reconstruction circuit responds by reconstructing samples in the amplitude modulation signal that correspond to detected phase reversals or a near phase reversals represented in samples of the angle modulation signal.
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Nguyen Duc M
Panasonic Corporation
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