Image-canceling quadrature modulator and method

Details Image-canceling quadrature modulator and method Image-canceling quadrature modulator and method

2006-11-21

2006-11-21

Corrielus, Jean B. (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S298000, C375S285000

Reexamination Certificate

active

07139326

ABSTRACT:
Canceling images in a quadrature modulator includes frequency shifting the baseband signal and images; filtering the frequency shifted baseband signal and images; phase and frequency shifting the baseband signal and images; filtering the phase and frequency shifted baseband signal and images; combining the filtered frequency shifted baseband signal and images with the filtered phase and frequency shifted baseband signal and images to suppress the negative frequency images and isolate the modulated baseband signal.

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