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公开(公告)号：US20140198835A1
公开(公告)日：2014-07-17
申请号：US14155120
申请日：2014-01-14
Applicant: Maxlinear, Inc.
Inventor： Curtis Ling , Rajasekhar Pullela
CPC classification number: H04L27/01 , H04B1/0057 , H04L27/0002 , H04L27/0008
Abstract: A multi-standard receiver may comprise in an electronic device, receiving an input radio frequency (RF) signal comprising at least two RF signals of different communication standards. The input RF signal may be separated into two signals based on their different communication standard sand configurable gain levels may be applied to equalize their magnitudes. The amplified signals may be combined, and the combined signals may be converted to a digital signal. The configurable gain may be applied to the two signals using variable gain amplifiers. A null may be generated at the input of at least one of the variable gain amplifiers utilizing a mixer and a filter, both configured to a desired frequency. The desired frequency may correspond to an interferer signal. The input RF signal may be separated into two signals utilizing a diplexer. The input RF signal may be received from a wired connection and/or an antenna.
Abstract translation: 多标准接收机可以包括在电子设备中，接收包括不同通信标准的至少两个RF信号的输入射频（RF）信号。 输入RF信号可以基于它们不同的通信标准被分成两个信号，可以应用砂可配置增益水平来均衡它们的幅度。 放大的信号可以被组合，并且组合的信号可以被转换成数字信号。 使用可变增益放大器可以将可配置增益应用于两个信号。 可以利用混合器和滤波器在至少一个可变增益放大器的输入处产生零，两者均被配置为期望的频率。 期望的频率可以对应于干扰信号。 输入RF信号可以利用双工器分离成两个信号。 可以从有线连接和/或天线接收输入RF信号。
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2.发明申请公开(公告)号：US20180152265A1
公开(公告)日：2018-05-31
申请号：US15880321
申请日：2018-01-25
Applicant: Maxlinear, Inc.
Inventor： Rajasekhar Pullela , Timothy Gallagher , Glenn Chang
CPC classification number: H04L1/0091 , H04H40/90
Abstract: Methods and systems for improved cross polarization rejection and tolerating of coupling between satellite signals may comprise receiving radio frequency (RF) signals on a chip, where the RF signals comprising a desired signal and at least one crosstalk signal. The received RF signals may be down-converted to baseband frequencies, and the down-converted signals are converted to digital signals. Crosstalk may be determined by estimating complex coupling coefficients between the received RF signals utilizing a de-correlation algorithm across a frequency bandwidth comprising the desired and crosstalk signals. The down-converted signals may be low-pass filtered and summed with an output signal from a cancellation filter. The complex coupling coefficients may be determined utilizing the de-correlation algorithm on the summed signals, and may be used to configure the cancellation filter. Crosstalk may be canceled in a receiver path from a cancellation filter receiving low-pass filtered down-converted signals from another path.
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公开(公告)号：US10135573B2
公开(公告)日：2018-11-20
申请号：US15880321
申请日：2018-01-25
Applicant: Maxlinear, Inc.
Inventor： Rajasekhar Pullela , Timothy Gallagher , Glenn Chang
Abstract: Methods and systems for improved cross polarization rejection and tolerating of coupling between satellite signals may comprise receiving radio frequency (RF) signals on a chip, where the RF signals comprising a desired signal and at least one crosstalk signal. The received RF signals may be down-converted to baseband frequencies, and the down-converted signals are converted to digital signals. Crosstalk may be determined by estimating complex coupling coefficients between the received RF signals utilizing a de-correlation algorithm across a frequency bandwidth comprising the desired and crosstalk signals. The down-converted signals may be low-pass filtered and summed with an output signal from a cancellation filter. The complex coupling coefficients may be determined utilizing the de-correlation algorithm on the summed signals, and may be used to configure the cancellation filter. Crosstalk may be canceled in a receiver path from a cancellation filter receiving low-pass filtered down-converted signals from another path.
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