公开(公告)号：US11202264B2

公开(公告)日：2021-12-14

申请号：US16513356

申请日：2019-07-16

Applicant: QUALCOMM Incorporated

Inventor： Steven Charles Ciccarelli ,  Vikas Mahajan ,  Tae Min Kim ,  Supratik Bhattacharjee ,  Chitaranjan Pelur Sukumar ,  Ashok Mantravadi ,  Pooyan Amini ,  Alberto Rico Alvarino ,  Carl Hardin

IPC: H04W52/24 ,  H04L1/00 ,  H04L1/20 ,  H04L5/00 ,  H04W52/14 ,  H04W52/52 ,  H04W72/04

Abstract: Some techniques and apparatuses described herein protect components of a user equipment (UE), such as a low noise amplifier (LNA), from internal interference. For example, the LNA may be disconnected from a receive chain during periods of high internal interference, and may be reconnected to the receive chain during periods of low internal interference. Furthermore, some techniques and apparatuses described herein improve performance by adjusting operations of the UE to account for and/or offset increased internal interference due to a receive chain that does not include a surface acoustic wave (SAW) filter to remove unwanted radio frequency signals. For example, one or more operations of a baseband processor may be modified to account for the increased internal interference. Additionally, or alternatively, reporting of channel state information may be modified to account for increased internal interference of the UE. Additional details are described herein.

公开(公告)号：US10931498B1

公开(公告)日：2021-02-23

申请号：US16683162

申请日：2019-11-13

Applicant: QUALCOMM Incorporated

Inventor： Alexander Dorosenco ,  Carl Hardin ,  Joseph Patrick Burke ,  Joseph Binamira Soriaga ,  Jay King

IPC: H04L27/26 ,  H03L7/085 ,  H04W56/00

Abstract: Phase variations between a transmitter (TX) waveform and a receiver (RX) waveform produced by a TX Phase-Locked-Loop (PLL) and a RX PLL, respectively, is a source of error in processing delay calibration used, e.g., in Round Trip Time (RTT) estimation. While a TX waveform and a RX waveform have a constant phase delay while in steady state conditions, during transient times, e.g., at start up or reset, the phase delay may vary by as much as ±180°, which at baseband frequencies of 50 MHz, introduces a random delay variations of as much as ±10 nsec, which is undesirable for fine position estimation using RTT. The phase delay variation between the TX waveform and RX waveform may be reduced or eliminated using a phase correction signal generated using the output signals of the TX PLL and RX PLL.