Telecommunications – Transmitter – Frequency conversion
Reexamination Certificate
2007-07-17
2007-07-17
Tran, CongVan (Department: 2617)
Telecommunications
Transmitter
Frequency conversion
C455S115100, C455S091000
Reexamination Certificate
active
11049057
ABSTRACT:
A method and system is described wherein an information signals is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the information signal is modulated as part of the up-conversion process. In a first modulation embodiment, one information signal is phase modulated onto the carrier signal as part of the up-conversion process. In a second modulation embodiment, two information signals are multiplied, and, as part of the up-conversion process, one signal is phase modulated onto the carrier and the other signal is amplitude modulated onto the carrier. In a third modulation embodiment, one information signal is phase modulated onto the “I” phase of the carrier signal as part of the up-conversion process and a second information signal is phase modulated onto the “Q” phase of the carrier as part of the up-conversion process. In a fourth modulation embodiment, four information signals are phase and amplitude modulated onto the “I” and “Q” phases of the carrier as part of the up-conversion process. There are at least two implementations of each of the aforementioned embodiments.
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Bultman Michael J.
Cook Robert W.
Looke Richard C.
Moses, Jr. Charley D.
Sorrells David F.
ParkerVision, Inc.
Tran CongVan
LandOfFree
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