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公开(公告)号：US20200313844A1
公开(公告)日：2020-10-01
申请号：US16367962
申请日：2019-03-28
Applicant: Silicon Laboratories Inc.
Inventor： Guner Arslan , Amey Naik , Yan Zhou
Abstract: A wireless receiver including a front end circuit, an adaptive threshold circuit, and a correlator. The front end circuit converts a wireless signal into a series of digital symbols. The adaptive threshold circuit provides an adaptive correlation threshold that is adapted based on a sync word. The correlator correlates the digital symbols with the sync word using the adaptive correlation threshold. The adaptive correlation threshold may be based on amplitude attenuation of the digital symbols that correspond to transitions of the sync word. The adaptive threshold circuit may be a lookup table that stores different threshold values each corresponding to one of multiple different sync words. Alternatively, the adaptive threshold circuit may be implemented as an evaluation circuit that determines the adaptive correlation threshold based on expected amplitude attenuation of the digital symbols that correspond to transitions of the sync word.
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22.发明授权Die-to-die communication links for receiver integrated circuit dies and related methods 有权用于接收器集成电路管芯的模 - 模通信链路和相关方法公开(公告)号：US09252891B2
公开(公告)日：2016-02-02
申请号：US14575391
申请日：2014-12-18
Applicant: Silicon Laboratories Inc.
Inventor： John B. Youngblood , Guner Arslan , J. A. Bolton , Trenton J. Grale , Vitor Pereira , Jeffrey A. Tindle , David S. Trager , Yan Zhou
CPC classification number: H04B15/00
Abstract: Die-to-die communication links for receiver integrated circuit dies within multi-die systems and related methods are disclosed for radio frequency (RF) receivers. The disclosed embodiments provide die-to-die communication links that allow for direct communication of operating parameters between receiver integrated circuit dies and other integrated circuit dies within a multi-die system so that the operation of receive path circuitry can be adjusted without requiring intervention from an external host processor integrated circuit. A variety of operating parameter information can be communicated through the die-to-die communication links so that the integrated circuit dies can quickly adjust to changing signal conditions without requiring intervention by the external host processor integrated circuit.
Abstract translation: 针对射频（RF）接收机公开了用于多芯片系统内的接收机集成电路管芯的模 - 模通信链路和相关方法。 所公开的实施例提供了允许在多管芯系统内的接收器集成电路管芯与其他集成电路管芯之间的操作参数的直接通信的管芯到管芯通信链路，使得可以调整接收路径电路的操作，而无需干预 外部主机处理器集成电路。 可以通过管芯到管芯通信链路传送各种操作参数信息，使得集成电路管芯可以快速地适应不断变化的信号条件，而不需要外部主机处理器集成电路的干预。
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公开(公告)号：US20140376651A1
公开(公告)日：2014-12-25
申请号：US13921375
申请日：2013-06-19
Applicant: Silicon Laboratories Inc.
Inventor： John Khoury , Yan Zhou
IPC: H03D1/04
Abstract: An image rejection (IR) circuit is configured to receive a complex signal from a radio frequency (RF) mixer, where the complex signal includes an in-phase signal portion and a quadrature signal portion. This IR circuit may include: an in-phase path to remove first mismatch information from the in-phase signal portion and associated with at least one in-phase multi-tap filter; a quadrature path to remove second mismatch information from the quadrature signal portion and associated with at least one quadrature multi-tap filter; and a correlation unit to independently update each of the multiple taps of the in-phase multi-tap filter and the quadrature multi-tap filter according to a priority scheme.
Abstract translation: 图像抑制（IR）电路被配置为从射频（RF）混合器接收复信号，其中复信号包括同相信号部分和正交信号部分。 该IR电路可以包括：同相路径，用于从同相信号部分去除与至少一个同相多抽头滤波器相关联的第一失配信息; 从正交信号部分去除第二不匹配信息并与至少一个正交多抽头滤波器相关联的正交路径; 以及相关单元，用于根据优先级方案独立地更新同相多抽头滤波器和正交多抽头滤波器的多个抽头中的每个抽头。
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公开(公告)号：US12127144B2
公开(公告)日：2024-10-22
申请号：US18215488
申请日：2023-06-28
Applicant: Silicon Laboratories Inc.
Inventor： John M. Khoury , Yan Zhou , Michael A. Wu , Wentao Li
CPC classification number: H04W56/0035 , H04W56/005 , H04W4/023
Abstract: In at least one embodiment, a method for measuring a distance between a first communications device including a first local oscillator and a second communications device including a second local oscillator includes unwrapping N phase values to generate N unwrapped phase values. N is an integer greater than one. Each of the N phase values indicate an instantaneous phase of a received signal. The method includes averaging the N unwrapped phase values to generate an average phase value. The method includes wrapping the average phase value to generate a final phase measurement of the first local oscillator with respect to the second local oscillator.
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公开(公告)号：US20240291581A1
公开(公告)日：2024-08-29
申请号：US18175606
申请日：2023-02-28
Applicant: Silicon Laboratories Inc.
Inventor： Yi Shen Yeh , Yan Zhou , Marc Leroux
CPC classification number: H04J3/0658 , H04W52/0229
Abstract: In one implementation, a method comprises: receiving, in a first radio, a radio frequency (RF) signal and processing the RF signal to provide a bit stream to a digital circuit of the first radio; enabling a first correlator of the first radio to detect at least a first portion of a sync word of a wake-up packet of the bit stream, and thereafter enabling a second correlator of the first radio to detect at least a second portion of the sync word; enabling an averager circuit to detect another portion of the sync word; and in response to detection of the sync word, disabling the first and second correlators and maintaining the averager circuit enabled.
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Patent Agency Ranking
公开(公告)号：US20240187036A1
公开(公告)日：2024-06-06
申请号：US18073028
申请日：2022-12-01
Applicant: Silicon Laboratories Inc.
IPC: H04B1/7103
CPC classification number: H04B1/7103
Abstract: Techniques for quickly and accurately determining whether a channel is being used for transmission of data using one of a plurality of communications protocols for low power signals using random data of a packet are disclosed. The techniques increase sensitivity and reduce the false alarm rate for a wide range of signal and noise levels. A noise detection technique uses an adaptive window size for fast noise detection that increases the rate of scanning channels during a signal identification period. In a BLE1M detection mode, detection of clusters of zero frequency deviation are used to reduce the false detection rate. Adaptive Zigbee symbol detection improves detection sensitivity beyond −97 dBm. The techniques use a chip-based differential to generate frequency deviation samples for Zigbee detection or data filtering frequency deviation samples generated using sample-based differentials based on an oversampled received signal to improve the signal-to-noise ratio.
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27.发明公开公开(公告)号：US20230412205A1
公开(公告)日：2023-12-21
申请号：US18241172
申请日：2023-08-31
Applicant: Silicon Laboratories Inc.
Inventor： Antonio Torrini , Hendricus de Ruijter , Yan Zhou , David Trager
Abstract: An apparatus includes a radio-frequency (RF) receiver for receiving an RF signal using a plurality of antennas. The RF receiver includes a demodulator to provide a switch signal to cause the RF receiver to use an antenna in the plurality of antennas. The RF receiver further includes a carrier frequency offset (CFO) correction circuit that estimates and removes a carrier frequency offset.
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公开(公告)号：US11737038B2
公开(公告)日：2023-08-22
申请号：US17107316
申请日：2020-11-30
Applicant: Silicon Laboratories Inc.
Inventor： Michael A. Wu , Wentao Li , John M. Khoury , Yan Zhou
CPC classification number: H04W56/0035 , H04W56/005 , H04W56/0055 , H04W52/0287
Abstract: A method for communicating between a first radio frequency communications device including a first local oscillator and a second radio frequency communications device including a second local oscillator includes generating phase values based on samples of a received signal. Each of the phase values indicates an instantaneous phase of the received signal. The method includes unwrapping the phase values to generate unwrapped phase values. The method includes generating frequency offset estimates based on the unwrapped phase values. The method includes generating an average frequency offset estimate based on the unwrapped phase values. The method includes wrapping the average frequency offset estimate to generate a residual frequency offset estimate. The method includes adjusting the first local oscillator based on the residual frequency offset estimate, thereby reducing a frequency offset between the first local oscillator and the second local oscillator.
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公开(公告)号：US11686834B2
公开(公告)日：2023-06-27
申请号：US17486037
申请日：2021-09-27
Applicant: Silicon Laboratories Inc.
Inventor： Terry Lee Dickey , Yan Zhou , Michael Wu
Abstract: A system and method for one-way ranging is disclosed. The system comprises a transmitter, also referred to as tag, transmitting a packet having a first frequency. The receiver, also referred to as the locator, receives the first frequency and measures the phase at a specific point in time. At a predetermined time, the transmitter switches to a second frequency. This is performed while maintaining phase continuity. The receiver also switches to the second frequency at nearly the same time. The receiver then measures the phase of the second frequency at a second point in time. Based on these two phase measurements, the distance between the transmitter and the receiver may be calculated.
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公开(公告)号：US20180287832A1
公开(公告)日：2018-10-04
申请号：US15472609
申请日：2017-03-29
Applicant: Silicon Laboratories Inc.
Abstract: An apparatus includes an RF receiver. The RF receiver includes digital signal arrival (DSA) circuitry to detect an arrival of a received signal in the RF receiver and to indicate arrival of the received signal. The RF receiver further includes detection circuitry to detect a signal from the received signal, and a controller to control operation of the detection circuitry depending on whether the DSA circuitry indicates the arrival of the received signal.
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