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1. 发明申请

WO2022026247A2 METHODS AND APPARATUSES FOR PILOT SIGNALING SUPPORTING DIGITAL POST-DISTORTION(DPOD) TECHNIQUES 审中-公开
公开(公告)号：WO2022026247A2
公开(公告)日：2022-02-03
申请号：PCT/US2021/042365
申请日：2021-07-20
申请人： QUALCOMM INCORPORATED
发明人： LEVY, Sharon , TOUBOUL, Assaf , WOLF, Guy , GUTMAN, Igor
IPC分类号： H04L5/00 , H04L25/02 , H04B1/0475 , H04B2001/0425 , H04L25/0224 , H04L5/0023 , H04L5/0048 , H04L5/0073 , H04L5/0092 , H04W72/042 , H04W72/082
摘要： Methods, systems, and devices for wireless communications are described. Some systems may support digital post-distortion (DPoD) processing at a base station. In some such systems, a user equipment (UE) may process a data message for transmission, where a resulting signal associated with the data message includes non-linear characteristics that are handled by DPoD on the receiver-side. The non-linear characteristics may cause the signal to leak into out-of-band (OOB) resources, potentially resulting in interference. In some examples, the UE may transmit the data message to the base station in a multi-user system. To support mitigation of non-linear interference on signaling by other UEs, the UE may additionally transmit pilot signals in OOB resources (e.g., in addition to in-band resources) where the non-linearity may be expected to negatively affect other communications. The base station may use the OOB pilot signals to perform channel estimation and interference mitigation.

2. 发明申请

WO2021242483A1 TECHNIQUES FOR PROCESSING DIGITAL POST DISTORTION USING ADDITIONAL REFERENCE SYMBOLS 审中-公开
公开(公告)号：WO2021242483A1
公开(公告)日：2021-12-02
申请号：PCT/US2021/030563
申请日：2021-05-04
申请人： QUALCOMM INCORPORATED
发明人： LEVY, Sharon , WOLF, Guy , GUTMAN, Igor , TOUBOUL, Assaf , EGER, Ory , ZACH, Noam
IPC分类号： H04B1/04 , H04L5/00 , H04L25/02 , H04B7/06
摘要： Techniques for wireless communications are described. A communication device may support processing digital post distortion using additional references symbols. For example, the communication device may precode a signal including at least two reference symbols for a single-layer transmission using at least two antenna ports. At least one reference symbol of the at least two reference symbols is associated with at least one data symbol of a data stream. The communication device may estimate, based on the at least two reference symbols, a nonlinearity model of at least two power amplifiers associated with the single-layer transmission, and determine an estimate of a nonlinearity factor of the precoded signal based on the estimated nonlinearity model. As a result, the communication device may eliminate or reduce the nonlinear factor of the precoded signal based on the estimated nonlinearity model of the at least two power amplifiers and the estimated channel impulse response.

3. 发明申请

WO2019126193A1 SYSTEM AND METHOD FOR NONLINEARITY ESTIMATION WITH REFERENCE SIGNALS 审中-公开
公开(公告)号：WO2019126193A1
公开(公告)日：2019-06-27
申请号：PCT/US2018/066264
申请日：2018-12-18
申请人： QUALCOMM INCORPORATED
发明人： SAGI, Ariel Yaakov , GUTMAN, Igor
IPC分类号： H04L25/02 , H04L25/03 , H03F1/32
摘要： 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.

4. 发明申请

WO2021237248A1 INDICATIONS OF A POWER AMPLIFIER NONLINEARITY STATE 审中-公开
公开(公告)号：WO2021237248A1
公开(公告)日：2021-11-25
申请号：PCT/US2021/070593
申请日：2021-05-21
申请人： QUALCOMM INCORPORATED
发明人： GUTMAN, Igor , LEVY, Sharon , WOLF, Guy
IPC分类号： H04B1/04
摘要： Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first wireless communication device may receive an indication of a power amplifier nonlinearity state to use for transmitting a communication to a second wireless communication device, and transmit the communication based at least in part on the indication of the power amplifier nonlinearity state. Numerous other aspects are provided.

5. 发明申请

WO2021108701A1 METHODS AND APPARATUS FOR ADAPTIVE WHITENING 审中-公开
公开(公告)号：WO2021108701A1
公开(公告)日：2021-06-03
申请号：PCT/US2020/062412
申请日：2020-11-25
申请人： QUALCOMM INCORPORATED
发明人： GUTMAN, Igor , WOLF, Guy , LANDIS, Shay , KUTZ, Gideon , LEVY, Sharon , DALLAL, Yehonatan
IPC分类号： H04L25/03 , H04J11/00 , H04B17/345
摘要： Aspects are provided which allow a UE to apply a modified interference cleaning data to account for differences in interference between at least one pilot resource and at least one data resource, thereby improving data decoding performance of the UE. The UE receives at least one pilot resource and at least one data resources from a base station and identifies interference cleaning data based on the pilot resource. The UE then determines whether a first interference affecting the pilot resource is the same as a second interference affecting the data resource. When the first interference is the same as the second interference, the UE applies the interference cleaning data to the data resource. Otherwise, when the first interference is different than the second interference, the apparatus applies a modified interference cleaning data to the data resource.

6. 发明申请

WO2019045866A1 METHOD AND APPARATUS FOR DIGITAL PRE-DISTORTION WITH REDUCED OVERSAMPLING OUTPUT RATIO 审中-公开
公开(公告)号：WO2019045866A1
公开(公告)日：2019-03-07
申请号：PCT/US2018/040025
申请日：2018-06-28
申请人： QUALCOMM INCORPORATED
发明人： GUTMAN, Igor , SAGI, Ariel , EITAN, Alecsander
IPC分类号： H03F1/02 , H03F1/32 , H03F3/195 , H03F3/213 , H04B1/04 , H04L27/36 , H03M1/12 , H03M1/66
摘要： Certain aspects of the present disclosure are directed to a digital predistortion (DPD) device for use within a wireless transmitter that permits the use of a downstream digital-to-analog converter that operates at a clock rate close to the bandwidth of a digital baseband input signal. In some examples, a sampling rate of a digital baseband input signal is increased using an upsampler to obtain an increased rate digital input signal. Predistortion is applied to the increased rate digital input signal using a DPD device to obtain a predistorted digital signal. The sampling rate of the predistorted digital signal is then decreased using a downsampler to obtain a lower-rate predistorted digital signal with a sampling rate below the increased rate of the upsampler (e.g. close to the bandwidth of a digital baseband input signal). A low pass filter may be provided to filter out-of-band signal components from the predistorted digital signal.

7. 发明申请

WO2017222701A1 OVER THE AIR ACQUISITION OF RADIO FREQUENCY IMPAIRMENT INFORMATION 审中-公开
标题翻译：对空中收音机频率减损信息的收集
公开(公告)号：WO2017222701A1
公开(公告)日：2017-12-28
申请号：PCT/US2017/033548
申请日：2017-05-19
申请人： QUALCOMM INCORPORATED
发明人： WEISSMAN, Haim, Mendel , GUTMAN, Igor , BURKE, Joseph, Patrick , CHELLAPPA, Vijay , VERMA, Sumit , DRAXLER, Paul
IPC分类号： H04B17/309 , H04B17/354 , H04B17/373 , H04L27/38
摘要： 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.
摘要翻译：公开了用于提供关于TX RF非线性损伤的指示的系统和方法。根据一些实施方式，第一设备（UE或基站）估计信号的EVM指示并确定EVM指示是否高于阈值。当确定EVM指示是传输信号时，第一设备可以向第二设备传输诸如AM-AM，AM-PM，沃尔特拉系数和/或其他性能指标的估计的TX非线性指示超过门槛。还公开了用于无线通信损伤校正的系统和方法，其中，根据一些实施方式，第一设备从第二设备接收诸如AM-AM，AM-PM和/或沃尔特拉系数的估计的TX非线性指示，至少部分基于EVM指示对第二接收机设备的发射信号进行非线性校正。其他方面，实施例和特征也被要求和描述。

8. 发明申请

WO2023014421A1 LOW NOISE AMPLIFIER SATURATION MITIGATION 审中-公开
公开(公告)号：WO2023014421A1
公开(公告)日：2023-02-09
申请号：PCT/US2022/030855
申请日：2022-05-25
申请人： QUALCOMM INCORPORATED
发明人： GUTMAN, Igor , ABEDINI, Navid , GAAL, Peter , LUO, Tao , LI, Junyi
IPC分类号： H04B17/24
摘要： Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive signaling from a base station and may pass the signaling through one or more low noise amplifiers (LNAs) at a receiver of the UE. The UE may determine a saturation threshold at the one or more LNAs is exceeded. The UE may transmit an indication to the base station that the saturation threshold is exceeded. The base station may send additional signaling to the UE whose content, schedule, or configuration is responsive to the indication that the saturation threshold is exceeded. The UE may process the additional signaling using a digital linearizer at a receive chain of the UE. A base station may indicate an LNA saturation state to a UE in advance. The UE may respond to the indication (e.g., by setting LNA and digital linearizer states to accommodate predicted saturation).

9. 发明申请

WO2021183811A1 DIGITAL PREDISTORTION TRAINING PROCEDURE FOR MASSIVE ARRAY 审中-公开
公开(公告)号：WO2021183811A1
公开(公告)日：2021-09-16
申请号：PCT/US2021/021978
申请日：2021-03-11
申请人： QUALCOMM INCORPORATED
发明人： GUTMAN, Igor , LEVITSKY, Michael , TOUBOUL, Assaf , SHAKED, Ronen
IPC分类号： H03F1/32 , H04L27/36 , H04B1/04 , H04L1/00
摘要： This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for a DPD training procedure. A base station may transmit, for a plurality of iterations, a signal to at least one UE through a plurality of transmit chains and with application of DPD. The signal transmitted for each iteration may be transmitted with a BW that extends over a plurality of subcarriers and includes pilots extending over a BW subset that increases in subcarrier size for each iteration. The base station may receive, for each iteration, feedback from the at least one UE based on the transmitted signal and apply DPD to each of the plurality of transmit chains based on the feedback. Accordingly, the base station may transmit to one or more UEs through the plurality of transmit chains and with application of the DPD pilot signals that extend over the entire BW.

10. 发明申请

WO2021154799A1 SSB CHANNEL CANCELATION 审中-公开
公开(公告)号：WO2021154799A1
公开(公告)日：2021-08-05
申请号：PCT/US2021/015202
申请日：2021-01-27
申请人： QUALCOMM INCORPORATED
发明人： WOLF, Guy , LEVY, Sharon , GUTMAN, Igor , DALLAL, Yehonatan
IPC分类号： H04L5/00 , H04J11/00
摘要： A synchronization signal block (SSB) transmitted by a neighbor base station may interfere with a physical downlink shared channel (PDSCH) transmitted by a serving base station. A user equipment (UE) that receives both the SSB and PDSCH may mitigate the interference to improve an error rate of decoding the PDSCH. The UE may receive a first SSB including a first broadcast channel (BCH) from a second base station other than a serving base station. The UE may decode the first SSB. The UE may determine, based on the first SSB and the first BCH, that the PDSCH scheduled by the serving base station will overlap with a second SSB from the second base station. The UE may estimate a channel of the second SSB based on the decoded first SSB. The UE may remove a reconstructed second SSB from the PDSCH. The UE may decode the PDSCH.

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