公开(公告)号：US11877352B2

公开(公告)日：2024-01-16

申请号：US17237908

申请日：2021-04-22

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxin Zhang ,  Stephen Jay Shellhammer ,  Kapil Rai ,  Jayanand Asok Kumar ,  Vikram Kandukuri ,  Sarin Mathen

IPC: H04W80/02 ,  H04B17/336 ,  H04B17/354 ,  H04B7/0413 ,  H04W84/12

CPC classification number: H04W80/02 ,  H04B17/336 ,  H04B17/354 ,  H04B7/0413 ,  H04W84/12

Abstract: In an aspect, a wireless device is configured to transmit a physical layer protocol data unit on one or more channels, wherein the physical layer protocol data unit includes a first portion and a second portion. The first portion includes a signal length field indicating a duration of a transmission of the physical layer protocol data unit. The second portion includes a plurality of Wi-Fi sensing fields. The wireless device is configured to receive a reflected signal and a leakage signal associated with the physical layer protocol data unit. The reflected signal includes the physical layer protocol data unit reflected off of a target object. The leakage signal is associated with the physical layer protocol data unit.

公开(公告)号：US10116485B1

公开(公告)日：2018-10-30

申请号：US15799360

申请日：2017-10-31

Applicant: QUALCOMM Incorporated

Inventor： Tienyow Liu ,  James Gardner ,  Jayanand Asok Kumar

IPC: H04L27/36 ,  H04B1/40 ,  H04L27/38 ,  H04L27/00

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for contemporaneously estimating transmitter in-phase and quadrature (I/Q) imbalances, receiver I/Q imbalances, and transmit carrier leakage in a wireless transceiver. In some implementations, first, second, and third frequency-domain multi-tone (FDMT) signals transmitted through a calibration path of the wireless transceiver are captured to generate frequency domain representations of the first, second, and third FDMT signals. The frequency domain representations of the first, second, and third FDMT signals may be used to contemporaneously estimate the transmitter I/Q imbalances, receiver I/Q imbalances, and the transmit carrier leakage, which in turn may be used to determine transmitter and receiver I/Q imbalance correction filter coefficients and a transmit carrier leakage correction factor.