Transmitter and method of generating a transmission signal

Details Transmitter and method of generating a transmission signal Transmitter and method of generating a transmission signal

2005-05-31

2005-05-31

Corrielus, Jean B. (Department: 2637)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S285000

Reexamination Certificate

active

06901114

ABSTRACT:
The invention relates to a transmitter and a method of generating a transmission signal, which transmitter includes a modulation device for generating two uncompensated transmission signals Y, Z by respective modulation of at least one baseband signal I, Q with an oscillation signal XLOQ, XLOI, the two uncompensated transmission signals Y, Z containing at least one respective interference component, which interference components are phase shifted by a given amount relative to one another. These interference components are eliminated by a compensation circuit that includes an all-pass. The all-pass rotates the phase of the interference component to be eliminated in one of the uncompensated transmission signals to overall a phase difference of 180° relative to the phase of the corresponding interference component in the other uncompensated transmission signal. The compensation of the interference component is realized by addition of the output signal of the first all-pass and the other uncompensated transmission signal.

REFERENCES:
patent: 3898566 (1975-08-01), Switzer et al.
patent: 5172072 (1992-12-01), Willems et al.
patent: 5579404 (1996-11-01), Fielder et al.
patent: 5786724 (1998-07-01), Teggatz
patent: 6120990 (1994-06-01), None

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