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公开(公告)号：US11489700B2
公开(公告)日：2022-11-01
申请号：US17141190
申请日：2021-01-04
Applicant: QUALCOMM Incorporated
Inventor： Noam Zach , Ori Ben Shahar , Guy Wolf , Sharon Levy , Igor Gutman , Ory Eger , Assaf Touboul
Abstract: Methods, systems, and devices for wireless communications are described. A receiving device may receive a channel estimation reference signal (CHEST-RS) transmitted over a bandwidth, the CHEST-RS associated with a power amplifier (PA) configuration of a transmitting device. The receiving device may determine a channel estimation measurement associated with the PA configuration based at least in part on the CHEST-RS. The receiving device may receive a non-linear estimation reference signal (NLEST-RS) transmitted over a subset bandwidth of the bandwidth, the NLEST-RS associated with the PA configuration. The receiving device may determine a non-linear estimation measurement associated with the PA configuration based at least in part on the NLEST-RS and the CHEST-RS, the non-linear estimation measurement identifying a non-linear response of the PA configuration. The receiving device may communicate with the transmitting device based at least in part on the channel estimation measurement and the non-linear response of the PA configuration.
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公开(公告)号：US11387933B2
公开(公告)日：2022-07-12
申请号：US16778608
申请日：2020-01-31
Applicant: QUALCOMM Incorporated
Inventor： Igor Gutman , Shahin Mehdizad Taleie , Oren Matsrafi , Ronen Greenberger , Gal Keret , Yossi Waldman , Gideon Shlomo Kutz
Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a downlink control message from a base station indicating a modulation and coding scheme (MCS) associated with an uplink transmission, a number of layers associated with the uplink transmission, or both. The UE may determine to adjust (for example, reduce) a first number of bits based on the MCS, the number of layers, or both. The first number of bits may include an effective number of bits (ENOB) supported at a digital-to-analog converter (DAC) of the UE, a number of bits (NOB) supported at a transmission front end (TxFE) component of the UE, or both. The UE may transmit the uplink transmission to the base station according to the adjusted first number of bits.
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Patent Agency Ranking
公开(公告)号：US11309992B2
公开(公告)日：2022-04-19
申请号：US16512039
申请日：2019-07-15
Applicant: QUALCOMM Incorporated
Inventor： Shay Landis , Igor Gutman , Assaf Touboul
Abstract: Methods, systems, and devices for wireless communications are described. Some wireless communications systems may utilize beamforming techniques to process wireless communications transmitted in millimeter wave (mmW) frequency ranges. In such cases, a user equipment (UE) may perform lattice reduction (LR)-based preprocessing for a received resource element (RE), which allows the UE to utilize demapping techniques (e.g., minimum mean square error (MMSE)-based demapping techniques or successive interference cancellation (SIC) demapping techniques) that are less computationally-complex than conventional demapping techniques (e.g., maximum likelihood (ML)-based demapping techniques) while providing a similar performance as conventional techniques. Further, due to mmW systems' robustness to time-dispersion, the UE may apply the same LR to multiple REs across multiple symbols in the time domain and across multiple sub-carriers in the frequency domain. The computational cost of performing the LR calculation may be spread across multiple REs and further increase the efficiency of utilizing low-complexity demapping techniques.
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公开(公告)号：US20210336666A1
公开(公告)日：2021-10-28
申请号：US16857488
申请日：2020-04-24
Applicant: QUALCOMM Incorporated
Inventor： Igor Gutman , Michael Levitsky , Guy Wolf , Sharon Levy
IPC: H04B7/0456 , H04L5/10 , H04L5/00 , H04B7/06 , H04B7/0417
Abstract: In one aspect, a method of wireless communication includes generating, by a user equipment (UE), a delta precoding value for a precoding matrix update, the delta precoding value relative to a previous precoding matrix. The method also includes generating, by the UE, a delta power loading value for the precoding matrix update, the delta power loading value relative to the previous precoding matrix. The method further includes transmitting, by the UE, a transmission indicating the delta precoding value and the delta power loading value. Other aspects and features are also claimed and described.
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公开(公告)号：US11108419B2
公开(公告)日：2021-08-31
申请号：US16908591
申请日：2020-06-22
Applicant: QUALCOMM Incorporated
Inventor： Ariel Yaakov Sagi , Igor Gutman
Abstract: A transmitter may be configured to generate a reference signal having a non-constant envelope for nonlinearity estimation by a receiver. The transmitter may transmit the reference signal. A receiver may be configured to receive, from the transmitter, the reference signal having the non-constant envelope. The receiver may estimate at least one nonlinearity characteristic based on the reference signal having the non-constant envelope. The receiver may transmit feedback based on the at least one nonlinearity characteristic and/or perform at least one digital post distortion (DPoD) operation based on the at least one nonlinearity characteristic.
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公开(公告)号：US20200028617A1
公开(公告)日：2020-01-23
申请号：US16512039
申请日：2019-07-15
Applicant: QUALCOMM Incorporated
Inventor： Shay Landis , Igor Gutman , Assaf Touboul
Abstract: Methods, systems, and devices for wireless communications are described. Some wireless communications systems may utilize beamforming techniques to process wireless communications transmitted in millimeter wave (mmW) frequency ranges. In such cases, a user equipment (UE) may perform lattice reduction (LR)-based preprocessing for a received resource element (RE), which allows the UE to utilize demapping techniques (e.g., minimum mean square error (MMSE)-based demapping techniques or successive interference cancellation (SIC) demapping techniques) that are less computationally-complex than conventional demapping techniques (e.g., maximum likelihood (ML)-based demapping techniques) while providing a similar performance as conventional techniques. Further, due to mmW systems' robustness to time-dispersion, the UE may apply the same LR to multiple REs across multiple symbols in the time domain and across multiple sub-carriers in the frequency domain. The computational cost of performing the LR calculation may be spread across multiple REs and further increase the efficiency of utilizing low-complexity demapping techniques.
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公开(公告)号：US20170366209A1
公开(公告)日：2017-12-21
申请号：US15274941
申请日：2016-09-23
Applicant: QUALCOMM Incorporated
Inventor： Haim Mendel Weissman , Igor Gutman , Joseph Patrick Burke , Vijay Chellappa , Sumit Verma , Paul Draxler
CPC classification number: H04B1/0475 , H04B17/23 , H04B17/24 , H04B17/309 , H04B17/354 , H04B17/373 , H04B2001/0433 , H04L27/38
Abstract: Systems and methods for providing indications about the TX RF non-linear impairments are disclosed. In accordance with some implementations, a first device (UE or base station) estimates EVM indications for the signal and determines if the EVM indications is above a threshold. The first device may transmit the estimated TX non-linearity indications such as AM-AM, AM-PM, Volterra coefficients, and/or other performance metrics to a second device, that transmitted the signal, when it is determined that the EVM indications is above the threshold. Systems and methods for wireless communication impairment correction are also disclosed wherein, in accordance with some implementations, a first device receives estimated TX non-linearity indications such as AM-AM, AM-PM, and/or Volterra coefficients from a second device and performs non-linear correction of a transmit signal for the second receiver device based at least in part on the EVM indications. Other aspects, embodiments, and features are also claimed and described.
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