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公开(公告)号：US10177946B2
公开(公告)日：2019-01-08
申请号：US14871169
申请日：2015-09-30
Applicant: MaxLinear, Inc.
Inventor： Chengzhi Zhou , Shuang Yu
Abstract: A method and system for impairment shifting is disclosed and may include receiving one or more radio frequency (RF) analog television signals in a receiver of a communication device, downconverting the received one or more received RF analog television signals to baseband frequencies, synchronizing the receiver to the one or more received RF analog television signals, and adjusting a frequency of one or more local oscillators in the receiver to configure in-phase/quadrature (I/Q) mismatch of a picture carrier signal to fall near a sound carrier signal in the received RF analog television signals. The frequency of the one or more local oscillators may be adjusted to configure a DC offset impairment to fall between luminance and chrominance harmonics at baseband in the analog television signals. I/Q imbalanced impairments may be configured with about 300 kHz separation from the sound carrier signal.
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公开(公告)号：US10594522B2
公开(公告)日：2020-03-17
申请号：US16237403
申请日：2018-12-31
Applicant: Maxlinear, Inc.
Inventor： Chengzhi Zhou , Shuang Yu
Abstract: 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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公开(公告)号：US20160028563A1
公开(公告)日：2016-01-28
申请号：US14871169
申请日：2015-09-30
Applicant: MaxLinear, Inc.
Inventor： Chengzhi Zhou , Shuang Yu
CPC classification number: H04L25/061 , H04B1/26 , H04B1/30 , H04L7/033 , H04L27/38 , H04N5/455 , H04N5/50
Abstract: A method and system for impairment shifting is disclosed and may include receiving one or more radio frequency (RF) analog television signals in a receiver of a communication device, downconverting the received one or more received RF analog television signals to baseband frequencies, synchronizing the receiver to the one or more received RF analog television signals, and adjusting a frequency of one or more local oscillators in the receiver to configure in-phase/quadrature (I/Q) mismatch of a picture carrier signal to fall near a sound carrier signal in the received RF analog television signals. The frequency of the one or more local oscillators may be adjusted to configure a DC offset impairment to fall between luminance and chrominance harmonics at baseband in the analog television signals. I/Q imbalanced impairments may be configured with about 300 kHz separation from the sound carrier signal.
Abstract translation: 公开了一种用于损伤转移的方法和系统，并且可以包括在通信设备的接收机中接收一个或多个射频（RF）模拟电视信号，将所接收的一个或多个接收到的RF模拟电视信号下变频到基带频率，同步接收机 到一个或多个接收到的RF模拟电视信号，并且调整接收机中的一个或多个本地振荡器的频率以将图像载波信号的同相/正交（I / Q）失配降低到靠近声载波信号 接收的RF模拟电视信号。 可以调整一个或多个本地振荡器的频率以将DC偏移损害配置为在模拟电视信号中的基带处的亮度和色度谐波之间落下。 I / Q不平衡损伤可以配置为与声载波信号分离约300 kHz。
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公开(公告)号：US20190140870A1
公开(公告)日：2019-05-09
申请号：US16237403
申请日：2018-12-31
Applicant: Maxlinear, Inc.
Inventor： Chengzhi Zhou , Shuang Yu
CPC classification number: H04L25/061 , H04B1/26 , H04B1/30 , H04L7/033 , H04L27/38 , H04N5/455 , H04N5/50
Abstract: 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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