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

IPC: H04L7/04 ,  H04B1/10 ,  H04L25/06

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.

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.

Inventor： Yan Zhou ,  Amey Naik ,  He Gou

IPC: H04L25/08 ,  H04W52/02 ,  H04W52/52

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.

公开(公告)号：US10992452B2

公开(公告)日：2021-04-27

申请号：US16367962

申请日：2019-03-28

Applicant: Silicon Laboratories Inc.

Inventor： Guner Arslan ,  Amey Naik ,  Yan Zhou

IPC: H04L7/04 ,  H04B1/10 ,  H04L25/06

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.

公开(公告)号：US20180159706A1

公开(公告)日：2018-06-07

申请号：US15370674

申请日：2016-12-06

Applicant: Silicon Laboratories Inc.

Inventor： Ping Xiong ,  Hendricus de Ruijter ,  Amey Naik ,  Yan Zhou

IPC: H04L27/22 ,  H04B1/16

Abstract: An apparatus includes a radio frequency (RF) receiver, which includes a digital signal arrival (DSA) detector to detect arrival of a transmitted signal. The DSA detector includes a frequency discriminator to receive a signal derived from a received RF signal to generate a first complex signal. The DSA detector further includes a correlator coupled to receive and process the first complex signal and to generate a second complex signal. The DSA detector in addition includes a Coordinate Rotation Digital Computer (Cordic) circuit to receive and process the second complex signal to generate a phase signal and a magnitude signal.