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1.发明申请公开(公告)号：US20190089391A1
公开(公告)日：2019-03-21
申请号：US15707306
申请日：2017-09-18
Applicant: Silicon Laboratories Inc.
Inventor： Alexander August Arthur Hakkola
Abstract: In one embodiment, an apparatus includes: a first radio receiver to receive and downconvert a first radio frequency (RF) signal to a first digital signal; a second radio receiver to receive and downconvert a second RF signal to a second digital signal; a correlation circuit to receive the first and second digital signals and determine a correlation between the first and second digital signals; a weight calculation circuit to determine a first weight value and a second weight value based at least in part on the correlation; and a combiner circuit to combine the first and second digital signals according to the first and second weight values.
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公开(公告)号：US10090818B1
公开(公告)日：2018-10-02
申请号：US15706821
申请日：2017-09-18
Applicant: Silicon Laboratories Inc.
Abstract: A receiver includes a compressive factor generator configured to generate a compressive gain signal based on a digital demodulated received signal, a signal quality estimate, an upper modulation level, and a lower modulation level. The receiver includes a gain circuit configured to apply the compressive gain signal to the digital demodulated received signal. The compressive factor generator may include a peak tracking filter configured to generate a peak tracking signal based on the digital demodulated received signal and filter configuration information. The compressive factor generator may include a compression threshold generator configured to generate a modulation index based on the peak tracking signal, the signal quality estimate, the upper modulation level, and the lower modulation level. The compressive factor generator may include a compression curve and a gain compression hold and recovery processor.
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公开(公告)号：US11258643B1
公开(公告)日：2022-02-22
申请号：US17323782
申请日：2021-05-18
Applicant: Silicon Laboratories Inc.
Inventor： Alexander August Arthur Hakkola
Abstract: In at least one embodiment of the invention, a method for reducing a dynamic range of a received radio frequency signal includes receiving digital IQ signals corresponding to an in-phase component of the received radio frequency signal and a quadrature component of the received radio frequency signal. The method includes demodulating the digital IQ signals to generate an instantaneous frequency signal. The method includes selecting a center frequency of a selectable filter according to whether an interfering signal is detected in a target frequency band of the received radio frequency signal. The center frequency is selected from a predetermined frequency and an estimated center frequency determined using the instantaneous frequency signal. The method includes filtering the digital IQ signals using the selectable filter configured using the center frequency to generate output digital IQ signals.
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公开(公告)号：US10256858B1
公开(公告)日：2019-04-09
申请号：US15707306
申请日：2017-09-18
Applicant: Silicon Laboratories Inc.
Inventor： Alexander August Arthur Hakkola
Abstract: In one embodiment, an apparatus includes: a first radio receiver to receive and downconvert a first radio frequency (RF) signal to a first digital signal; a second radio receiver to receive and downconvert a second RF signal to a second digital signal; a correlation circuit to receive the first and second digital signals and determine a correlation between the first and second digital signals; a weight calculation circuit to determine a first weight value and a second weight value based at least in part on the correlation; and a combiner circuit to combine the first and second digital signals according to the first and second weight values.
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