公开(公告)号：US11695445B2

公开(公告)日：2023-07-04

申请号：US17389258

申请日：2021-07-29

Applicant: Samsung Electronics Co., Ltd.

Inventor： Khurram Muhammad ,  Yu Liu ,  Chance Tarver

IPC: H04B1/525 ,  H04L5/14 ,  H04B1/04 ,  H04B1/18 ,  H04B1/10

CPC classification number: H04B1/525 ,  H04B1/0475 ,  H04B1/1081 ,  H04B1/18 ,  H04L5/143 ,  H04B2001/0425 ,  H04B2001/0433

Abstract: A cross-division duplex (XDD) system includes an apparatus having a transceiver configured to communicate via an uplink channel and a downlink channel concurrently. The apparatus also includes a transmit antenna, a receive antenna, and a processor. The processor is configured to: estimate a non-linear component corresponding to a transmit path in the transceiver; apply an equalizer function to a received signal; and subtract, in a self-interference cancel (SIC) circuitry, the estimated non-linear component from the equalized signal.

公开(公告)号：US20220069856A1

公开(公告)日：2022-03-03

申请号：US17139947

申请日：2020-12-31

Applicant: Samsung Electronics Co., Ltd.

Inventor： Michael Chen ,  Khurram Muhammad ,  Xinguang Xu

IPC: H04B1/12 ,  H03H17/00 ,  H03H17/02 ,  H03H17/08

Abstract: A radio frequency (RF) unit and a method for RF isolation. The RF unit includes first and second RF couplers, an RF filter, and an RF canceler connected in parallel with the RF filter. The first RF coupler is configured to receive an input signal. The RF filter is configured to receive a first portion of the input signal from the first RF coupler and attenuate frequencies outside of a passband of the RF filter from the first portion of the input signal. The RF canceler is configured to receive a second portion of the input signal from the first RF coupler and generate a cancellation signal from the second portion of the input signal based on a target frequency band of the RF canceler. The second RF coupler is configured to combine the cancellation signal with an output of the RF filter to generate an output signal.

公开(公告)号：US20220038133A1

公开(公告)日：2022-02-03

申请号：US17383295

申请日：2021-07-22

Applicant: Samsung Electronics Co., Ltd.

Inventor： Khurram Muhammad ,  Jin Yuan ,  Xinguang Xu

IPC: H04B1/525

Abstract: A communication device includes an antenna configured to receive a signal in a receive band and transmit a signal in a transmit band through a duplexer, analog transmitter-side radio frequency (RF) self-interference cancelation (SIC) circuitry configured to reduce power of the transmit signal in the receive band before input to the antenna, analog receiver-side RF SIC circuitry configured to reduce power of the receive signal in the transmit band before input to a first analog-to-digital converter (ADC) to convert the receive signal from analog to digital, a coupler configured to couple a small part of the transmit signal to a second ADC to convert the transmit signal from analog to digital, and digital SIC circuitry configured to process the digital sample to generate and apply an SIC signal to the digital receive signal to cancel interference induced in the receive signal by the transmit signal.