公开(公告)号：US20160174168A1

公开(公告)日：2016-06-16

申请号：US14572266

申请日：2014-12-16

Applicant: QUALCOMM Incorporated

Inventor： Lin Lu ,  Jagadish Nadakuduti ,  Paul Guckian

IPC: H04W52/26 ,  H04W24/02

CPC classification number: H04W52/26 ,  H04B7/0604 ,  H04W52/146 ,  H04W52/42

Abstract: A method and apparatus for avoiding transmit power limitations due to specific absorption rate (SAR) constraints. The method maximizes transmit power by transmitting on a first transmitter for a first period of time, second transmitter for a second period of time, through an Nth transmitter for an Nth period of time. The transmission time periods may or may not overlap, and the SAR distributions may or may not overlap. The transmitters may or may not transmit at different frequencies and may or may not share antennas. The average transmit power may be reduced by the number of transmitters that are periodically transmitting. The period of transmission for a given transmitter may be inversely proportional to the measured SAR for that particular transmitter.

Abstract translation: 一种用于避免由特定吸收率（SAR）约束引起的发射功率限制的方法和装置。 该方法通过在第一时间段的第一发射机上发送第二时间段的第二发射机，通过第N个发射机在第N个时间段内使发射功率最大化。 传输时间段可能重叠，也可能不重叠，SAR分布可能重叠或不重叠。 发射机可以或可以不以不同的频率发射，并且可以或可以不共享天线。 平均发射功率可以通过周期性发射的发射机的数量减少。 给定发射机的传输周期可能与该特定发射机的测量SAR成反比。

公开(公告)号：US09083452B2

公开(公告)日：2015-07-14

申请号：US13801328

申请日：2013-03-13

Applicant: QUALCOMM Incorporated

Inventor： Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian

IPC: H04B5/00 ,  H04B17/00 ,  H04B1/3827 ,  H04B17/10

CPC classification number: H04B17/10 ,  H04B1/3838 ,  H04B5/0025 ,  H04B5/0043 ,  H04B17/102

Abstract: Efficient techniques for estimating specific absorption rate (SAR) for wireless devices. In an aspect, electric and/or magnetic field measurements are made over a two-dimensional (2D) surface in the proximity of a wireless device. The field measurements are used to generate a near-field equivalent source representation of the wireless device. Specific absorption rate over, e.g., a 1 g/10 g mass may then be calculated by performing electromagnetic simulations using the near-field equivalent source representation. In an aspect, an elementary dipole array may be used to generate the near-field equivalent source representation from the field measurements.

Abstract translation: 用于估计无线设备的特定吸收率（SAR）的高效技术。 在一个方面，在无线设备附近的二维（2D）表面上进行电场和/或磁场测量。 场测量用于生成无线设备的近场等效源表示。 然后可以通过使用近场等效源表示进行电磁模拟来计算例如1g / 10g质量的比吸收率。 在一方面，可以使用基本偶极阵列来从场测量生成近场等效源表示。

公开(公告)号：US20140274190A1

公开(公告)日：2014-09-18

申请号：US13801232

申请日：2013-03-13

Applicant: QUALCOMM INCORPORATED

Inventor： Lin Lu ,  Jagadish Nadakuduti ,  Paul Guckian

IPC: H04B17/00

CPC classification number: H04W52/367

Abstract: Efficient techniques for determining compliance of a wireless device with radio-frequency (RF) exposure standards and regulations. In an aspect, two-dimensional surface scans of a device are determined and stored in a memory during a certification phase. Each scan corresponds to a basis surface scan wherein only one transmitter and one antenna of the device are active. During real-time operation, the basis surface scans corresponding to the real-time active transmitters and antennas of the device are retrieved. The retrieved scans are processed according to the real-time operating parameters to determine an estimated RF exposure metric, e.g., a peak specific absorption rate (SAR). The transmit power levels of the device may be adjusted in real time to ensure compliance of the estimated RF exposure metric with applicable standards and regulations.

Abstract translation: 确定无线设备符合射频（RF）暴露标准和法规的有效技术。 在一方面，设备的二维表面扫描在认证阶段被确定并存储在存储器中。 每个扫描对应于基础表面扫描，其中只有一个发射机和一个天线的设备是活动的。 在实时操作期间，检索对应于实时有源发射机和设备天线的基础表面扫描。 根据实时操作参数来处理检索的扫描以确定估计的RF暴露度量，例如峰值比吸收率（SAR）。 可以实时调整设备的发射功率电平，以确保估计的RF辐射度量符合适用的标准和规定。

公开(公告)号：US12213080B2

公开(公告)日：2025-01-28

申请号：US18487557

申请日：2023-10-16

Applicant: QUALCOMM Incorporated

Inventor： Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian ,  Mingming Cai ,  Junsheng Han ,  Udara Fernando ,  Raghu Challa

IPC: H04W52/12 ,  H04B1/3827 ,  H04W52/22

Abstract: In certain aspects, a method implemented in a wireless device includes determining a specific absorption rate (SAR) distribution for a first wireless communication technology, determining a power density (PD) distribution for a second wireless communication technology, and combining the SAR distribution and the PD distribution to generate a combined RF exposure distribution. The method also includes determining at least one first maximum allowable power level and at least one second maximum allowable power level for a future time slot based on the combined RF exposure distribution, setting at least one transmission power limit for a first transmitter in the future time slot based on the at least one first maximum allowable power level, and setting at least one transmission power limit for a second transmitter in the future time slot based on the at least one second maximum allowable power level.

公开(公告)号：US12177797B2

公开(公告)日：2024-12-24

申请号：US17412143

申请日：2021-08-25

Applicant: QUALCOMM Incorporated

Inventor： Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian ,  Troy Curtiss ,  Akhil Deodhar

IPC: H04W52/38 ,  H04B1/3827 ,  H04W52/22

Abstract: Certain aspects of the present disclosure provide techniques for operating a wireless communication device pursuant to radio frequency (RF) exposure with antenna grouping. An example method of wireless communication by a user equipment generally includes accessing a stored backoff factor associated with an antenna group among a plurality of antenna groups. The method also includes transmitting, from at least one transmit antenna in the antenna group, a signal at a transmission power level based on the backoff factor in compliance with an RF exposure requirement.

公开(公告)号：US12143938B2

公开(公告)日：2024-11-12

申请号：US17454614

申请日：2021-11-11

Applicant: QUALCOMM Incorporated

Inventor： Lin Lu ,  Jagadish Nadakuduti ,  Paul Guckian ,  Reza Shahidi

IPC: H04W52/22 ,  H04W52/28 ,  H04W52/36

Abstract: Certain aspects of the present disclosure provide techniques and apparatus for determining a transmit power based on a pattern and/or future conditions for a transmission while maintaining radio frequency (RF) exposure compliance. An example method generally includes obtaining a pattern associated with one or more first transmissions, determining a transmit power for one or more second transmissions based at least in part on the pattern and an RF exposure limit, and transmitting the one or more second transmissions at the determined transmit power.

公开(公告)号：US11871359B2

公开(公告)日：2024-01-09

申请号：US17470534

申请日：2021-09-09

Applicant: QUALCOMM Incorporated

Inventor： Lin Lu ,  Jagadish Nadakuduti ,  Akhil Deodhar ,  Troy Curtiss ,  Paul Guckian

IPC: H04W52/28 ,  H04B1/3827 ,  H04W52/30 ,  H04W88/06

CPC classification number: H04W52/283 ,  H04B1/3838 ,  H04W52/30 ,  H04W88/06

Abstract: Techniques and apparatus for configurable radio frequency (RF) exposure compliance based on region. An example method of wireless communication by a user equipment (UE) generally includes identifying a region in which the UE is located, selecting at least one of a mode or one or more parameters for RF exposure compliance based on the identified region, and transmitting a signal at a transmission power level based at least in part on the at least one of the selected mode or the selected one or more parameters.

公开(公告)号：US11792740B2

公开(公告)日：2023-10-17

申请号：US17949976

申请日：2022-09-21

Applicant: QUALCOMM Incorporated

Inventor： Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian ,  Mingming Cai ,  Junsheng Han ,  Udara Fernando ,  Raghu Challa

IPC: H04M1/00 ,  H04W52/22 ,  H04B1/3827 ,  H04W52/12

CPC classification number: H04W52/225 ,  H04B1/3838 ,  H04W52/12

Abstract: In certain aspects, a method implemented in a wireless device includes determining a specific absorption rate (SAR) distribution for a first wireless communication technology, determining a power density (PD) distribution for a second wireless communication technology, and combining the SAR distribution and the PD distribution to generate a combined RF exposure distribution. The method also includes determining at least one first maximum allowable power level and at least one second maximum allowable power level for a future time slot based on the combined RF exposure distribution, setting at least one transmission power limit for a first transmitter in the future time slot based on the at least one first maximum allowable power level, and setting at least one transmission power limit for a second transmitter in the future time slot based on the at least one second maximum allowable power level.

公开(公告)号：US11716695B2

公开(公告)日：2023-08-01

申请号：US17392442

申请日：2021-08-03

Applicant: QUALCOMM Incorporated

Inventor： Troy Curtiss ,  Akhil Deodhar ,  Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian

IPC: H04W52/24 ,  H04L1/00 ,  H04B17/10 ,  H04W52/22

CPC classification number: H04W52/245 ,  H04B17/101 ,  H04L1/0061 ,  H04W52/228

Abstract: Certain aspects of the present disclosure provide techniques for exception-robust time-averaged radio frequency (RF) exposure compliance continuity. A method that may be performed by a user equipment (UE) generally includes transmitting a first signal at a first transmission power based on time-averaged RF exposure measurements over a time window and storing RF exposure information associated with the time window. The method may also include detecting that an exception event associated with the UE occurred and transmitting a second signal at a second transmission power based at least in part on the stored RF exposure information in response to the detection of the event.

公开(公告)号：US11664841B2

公开(公告)日：2023-05-30

申请号：US17376067

申请日：2021-07-14

Applicant: QUALCOMM Incorporated

Inventor： Jagadish Nadakuduti ,  Lin Lu ,  Paul Guckian

IPC: H04W52/38 ,  H04B1/3827 ,  H04B17/10

CPC classification number: H04B1/3838 ,  H04B17/104 ,  H04W52/38

Abstract: According to certain aspects a wireless device includes transmitters, and a processor coupled to the transmitters. The processor is configured to determine a radio frequency (RF) exposure value at a peak location based on transmission power levels for the transmitters, determine a contribution of each one of the transmitters to the RF exposure value at the peak location, and reduce the transmission power level for each one of one or more of the transmitters based on the contributions of the transmitters to the RF exposure value at the peak location.