Method and system for impairment shifting

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United States of America Patent

PATENT NO 10594522
APP PUB NO 20190140870A1
SERIAL NO

16237403

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Methods and systems for impairment shifting may comprise receiving radio frequency (RF) signals in a receiver, downconverting the signals to baseband frequencies, and synchronizing the receiver to received signals. The frequency of a local oscillator (LO) may be adjusted to shift residual impairments to fall between desired baseband signals where they are least visible. The received RF signals may comprise analog, satellite, or cable, television signals. The LO frequency may be adjusted to configure the DC offset impairments to fall between luminance and chrominance harmonics. The LO frequency may be adjusted to configure I/Q imbalanced impairments from residual in-phase and quadrature mismatch of a picture carrier signal to fall about 300 kHz from a sound carrier signal in the analog television signals. The LO frequency may be adjusted to configure the I/Q imbalanced impairments from residual I/Q mismatch of a sound carrier signal to fall between luminance and chrominance harmonics.

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Patent Owner(s)

  • MAXLINEAR INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Yu, Shuang Carlsbad, US 20 59
Zhou, Chengzhi Carlsbad, US 4 13

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