Digitally adaptive modulated transmitter

Details Digitally adaptive modulated transmitter Digitally adaptive modulated transmitter

2006-04-25

2006-04-25

Vuong, Quochien B. (Department: 2685)

Telecommunications

Transmitter

Amplitude modulation

C455S114200, C455S115100, C375S296000, C375S300000

Reexamination Certificate

active

07035600

ABSTRACT:
A circuit for use in a broadcast transmitter for adaptively compensating for carrier signal distortions caused by amplitude modulating an RF carrier signal. The circuit includes a modulator/amplifier network that receives an RF carrier signal and modulates it by a received amplitude varying signal to obtain therefrom a modulated carrier signal which may exhibit distortions caused by the amplitude modulating of the RF carrier signal. A digitally adaptive corrector precorrects the amplitude varying signal prior to application thereof to the network to compensate for any modulated carrier signal distortions. This includes a digital processor that provides signal correction as a function of digital samples representing amplitude variations of the modulated RF carrier signal.

REFERENCES:
patent: 6285255 (2001-09-01), Luu et al.
patent: 6449466 (2002-09-01), Jin et al.
patent: 6489846 (2002-12-01), Hatsugai

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