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1. 发明申请

US20190052484A1 PROTECTION OF RANGING SOUNDING SIGNALS FROM PHYSICAL LEVEL ATTACKS 审中-公开
公开(公告)号：US20190052484A1
公开(公告)日：2019-02-14
申请号：US16152998
申请日：2018-10-05
申请人： QUALCOMM Incorporated
发明人： Erik David LINDSKOG , Ning ZHANG , Naveen Kumar KAKANI , Alireza RAISSINIA , Xiaoxin ZHANG
IPC分类号： H04L25/02 , H04L29/06 , H04W12/12
摘要： Generally, the described techniques provide for protection mechanisms for sounding training signals transmitted between wireless devices when performing ranging sounding estimation. For example, sounding training signals may be encoded to include a sequence of phase rotations or cyclic shifts to protect the sounding training signal from peer devices. In some cases, encoding information associated with a long training field (LTF) may be transmitted either before or after the LTF is transmitted. Additionally or alternatively, a time delay may be introduced to the sounding training signal, where timing information may be removed from one or more fields of the sounding training signal and the time delay may be appended to an interframe spacing. Alternatively, a frame may be split into multiple frames with the sounding training signal in a first frame, and timing information in a second frame that is offset in time from the first frame.

2. 发明申请

US20170280439A1 FTM PROTOCOL ENHANCEMENTS FOR CHANNEL DELAY SPREAD 审中-公开
公开(公告)号：US20170280439A1
公开(公告)日：2017-09-28
申请号：US15466167
申请日：2017-03-22
申请人： QUALCOMM Incorporated
发明人： Ning ZHANG , Xiaoxin Zhang , Kai Shi
IPC分类号： H04W72/04 , H04W24/02 , H04L5/00
CPC分类号： H04W72/0413 , H04L5/0007 , H04L5/0055 , H04L25/0216 , H04L27/2607 , H04W24/02
摘要： This disclosure provides systems, methods and apparatuses for selecting a guard interval for transmission of orthogonal frequency-division multiplexing (OFDM) symbols on an uplink (UL) channel and on a downlink (DL) channel. In some implementations, a transmitting device and a receiving device can estimate channel delay spread (CDS) information for each other's transmit channels, exchange the estimated CDS information with each other, and select a guard interval based on the estimated CDS information exchanged with each other. The transmitting device can transmit a number of OFDM symbols separated by the selected guard interval to the receiving device on the UL channel, and the receiving device can transmit a number of OFDM symbols separated by the selected guard interval to the transmitting device on the DL channel.

3. 发明申请

US20140254511A1 REDUCING IMPACT OF CLOCK DRIFT IN WIRELESS DEVICES 有权
标题翻译：减少无线设备中时钟干扰的影响
公开(公告)号：US20140254511A1
公开(公告)日：2014-09-11
申请号：US14185660
申请日：2014-02-20
申请人： Qualcomm Incorporated
发明人： Carlos Horacio ALDANA , Ning ZHANG
IPC分类号： H04W56/00
CPC分类号： H04W56/0035 , H04W40/244 , H04W56/003 , H04W88/08
摘要： Systems and methods for calculating round trip time (RTT) between two wireless devices with respective clock drifts, while lowering the impact of the clock drifts on the RTT. A first RTT in a first direction is determined between a first wireless device and a second wireless device based on a first set of one or more messages exchanged between the first wireless device and the second wireless device. A second RTT in a second direction is determined between the second wireless device and the first wireless device based on a second set of one or more messages exchanged between the second wireless device and the first wireless device, and an average RTT of the first RTT and the second RTT is computed, wherein the average RTT has a low impact of the clock drifts.
摘要翻译：在具有相应时钟漂移的两个无线设备之间计算往返时间（RTT）的系统和方法，同时降低时钟漂移对RTT的影响。基于在第一无线设备和第二无线设备之间交换的一个或多个消息的第一组，在第一无线设备和第二无线设备之间确定第一方向上的第一RTT。基于在第二无线设备和第一无线设备之间交换的一个或多个消息的第二组以及第一RTT的平均RTT和第二无线设备的平均RTT，在第二无线设备和第一无线设备之间确定第二RTT，计算第二RTT，其中平均RTT对时钟漂移的影响较小。

4. 发明申请

US20190141717A1 TECHNIQUES FOR INTERLEAVING IN SINGLE USER PREAMBLE PUNCTURING 审中-公开
公开(公告)号：US20190141717A1
公开(公告)日：2019-05-09
申请号：US16157945
申请日：2018-10-11
申请人： QUALCOMM Incorporated
发明人： Lin YANG , Bin TIAN , Jialing Li CHEN , Lochan VERMA , Sameer VERMANI , Ning ZHANG , Kai SHI , Youhan KIM , Vincent Knowles JONES, IV
IPC分类号： H04W72/08 , H04L5/00 , H04L1/00 , H03M13/11 , H03M13/00
摘要： Aspects of the present disclosure provide techniques for interleaving in single user (SU) preamble puncturing in wireless local area networks (WLANs). In one implementation, a wireless device can identify an SU preamble puncture transmission, encode information for the SU preamble puncture transmission to produce encoded bits, parse the encoded bits into multiple segments, parse the encoded bits among multiple resource units (RUs) within each of the multiple segments, and perform a tone interleaving of the encoded bits within each of the multiple RUs. These techniques can be used in a 6 GHz band, as well as a 2.4 GHz band or a 5 GHz band.

5. 发明申请

US20170188191A1 BROADCAST TIME-OF-DEPARTURE (TOD) FRAME FORMAT 有权
公开(公告)号：US20170188191A1
公开(公告)日：2017-06-29
申请号：US15080337
申请日：2016-03-24
申请人： QUALCOMM Incorporated
发明人： Carlos Horacio ALDANA , Ning ZHANG , James Simon CHO , Xiaoxin ZHANG
IPC分类号： H04W4/02 , H04L27/26 , H04W56/00
CPC分类号： H04W4/023 , G01S5/021 , G01S5/14 , G01S11/08 , G01S19/48 , H04L27/266 , H04W4/02 , H04W56/0015 , H04W56/0025
摘要： Disclosed herein are techniques for range measurement between one or more wireless stations (STAs) and a first access point (AP). In various embodiments, the first AP may synchronize a clock of the first AP with clocks of one or more synchronized APs. The first AP may perform a synchronization session with the one or more STAs. The first AP may also transmit one or more Broadcast time-of-departure (TOD) frames to the one or more STAs. Each of the one or more Broadcast TOD frames may include a time of departure of a Broadcast TOD frame from the first AP. A second AP and a third AP of the one or more synchronized APs may also transmit one or more Broadcast TOD frames to the one or more STAs for range and/or position determination.

6. 发明申请

US20150003434A1 SYSTEMS AND METHODS FOR WIRELESS SCANNING 审中-公开
标题翻译：无线扫描系统与方法
公开(公告)号：US20150003434A1
公开(公告)日：2015-01-01
申请号：US13931320
申请日：2013-06-28
申请人： QUALCOMM Incorporated
发明人： Kai SHI , James Simon CHO , Ning ZHANG
IPC分类号： H04W24/10
CPC分类号： H04W24/08 , H04L69/22 , H04W24/10 , H04W40/244 , H04W48/16 , H04W84/12
摘要： Systems and methods are provided for preferentially locating a candidate channel likely to have an active network during a WLAN scanning process of an increased bandwidth. The candidate channel may be detected using spectral analysis of a received signal that may involve any combination FFT captures and correlation operations associated with detecting packets. Upon identification of a candidate channel, a wireless communications device may switch to that channel to receive and process one or more packets to determine the existence of a BSS available for association.
摘要翻译：提供了系统和方法，用于在增加的带宽的WLAN扫描过程期间优先地定位可能具有活动网络的候选信道。可以使用可能涉及与检测分组相关联的任何组合FFT捕获和相关操作的接收信号的频谱分析来检测候选信道。在识别候选信道之后，无线通信设备可以切换到该信道以接收和处理一个或多个分组，以确定可用于关联的BSS的存在。

7. 发明申请

US20140073352A1 METHOD FOR PRECISE LOCATION DETERMINATION 审中-公开
标题翻译：精确定位方法
公开(公告)号：US20140073352A1
公开(公告)日：2014-03-13
申请号：US14023098
申请日：2013-09-10
申请人： QUALCOMM Incorporated
发明人： Carlos Horacio ALDANA , Ning ZHANG
IPC分类号： G01S5/10
CPC分类号： G01S5/10 , G01S13/876
摘要： According to embodiments, methods are presented to for determining precise location of a device by exchanging a plurality of messages with one or more devices (e.g., access points or mobile devices) in vicinity. Embodiments may calculate distance between the devices using round trip time that takes to transmit and receive signals to/from each of the devices. Using definitions that account for multiple input multiple output (MIMO) transmission, the embodiments determine precise location of a device.
摘要翻译：根据实施例，呈现用于通过在附近与一个或多个设备（例如，接入点或移动设备）交换多个消息来确定设备的精确位置的方法。实施例可以使用往返于每个设备发送和接收信号的往返时间来计算设备之间的距离。使用考虑多输入多输出（MIMO）传输的定义，这些实施例确定设备的精确位置。

8. 发明申请

US20190271774A1 METHOD AND APPARATUS FOR MOTION DETECTION SYSTEMS 审中-公开
公开(公告)号：US20190271774A1
公开(公告)日：2019-09-05
申请号：US15909830
申请日：2018-03-01
申请人： QUALCOMM Incorporated
发明人： Xiaoxin ZHANG , Youngsin LEE , Ning ZHANG
IPC分类号： G01S13/56 , H04L25/02
摘要： Method, apparatus and systems for detecting motion of an object or person have been disclosed. The method and the accompanying apparatus for motion detection include determining a plurality of channel impulse response (CIR) power profiles over a plurality of time sampling taps of one or more received signals, time aligning the plurality of the CIR power profiles based on time sampling taps of one or more occurrences of peak CIR power levels being above a threshold in each of the plurality of the CIR power profiles for generating a reference CIR power profile, and detecting motion based on a comparison of the reference CIR power profile to a captured signal CIR power profile. The detecting motion may be based on a coarse motion detection process, and followed by a fine motion detection process if a correlation degree threshold is below a level in the coarse motion detection process.

9. 发明申请

US20190058545A1 TECHNIQUES FOR DISTORTION CORRECTION AT A RECEIVER DEVICE 审中-公开
公开(公告)号：US20190058545A1
公开(公告)日：2019-02-21
申请号：US16058301
申请日：2018-08-08
申请人： QUALCOMM Incorporated
发明人： Jialing Li CHEN , Lin YANG , Bin TIAN , Ning ZHANG , Vincent Knowles JONES, IV , Didier Johannes Richard VAN NEE , Louay JALLOUL , Ahmad Abdulrahman MOHAMMED
IPC分类号： H04L1/00 , H04W52/02
摘要： Apparatuses and methods for correcting a distorted signal at a receiver device during wireless local area network (WLAN) communications are disclosed. The apparatuses and methods include receiving, by a receiver device in a WLAN, a distorted signal corresponding to a data packet signal transmitted from a transmitter device, receiving, by the receiver device, one or more transmitter parameters corresponding to the transmission of the data packet signal, the one or more transmitter parameters including information to adjust the distorted signal, and adjusting, by the receiver device, the distorted signal to reconstruct the data packet signal based at least on the one or more transmitter parameters.

10. 发明申请

US20180351620A1 MULTIPLE SOUNDING CHANNEL ESTIMATION 审中-公开
公开(公告)号：US20180351620A1
公开(公告)日：2018-12-06
申请号：US15629356
申请日：2017-06-21
申请人： QUALCOMM Incorporated
发明人： Chi-Lin SU , Youhan KIM , Ning ZHANG
IPC分类号： H04B7/06 , H04B7/0417
CPC分类号： H04B7/0626 , H04B7/0695
摘要： This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for combining channel feedback obtained for multiple soundings and transmitting beamformed communications based on the combined channel feedback. In one aspect, a method includes transmitting, by a first wireless device, a first channel sounding using a first subset of antennas, receiving first channel feedback from a second wireless device based on the first channel sounding, transmitting a second channel sounding using a second subset of the antennas that partially overlaps with the first subset, receiving second channel feedback based on the second channel sounding, and transmitting a beamformed communication to the second wireless device based on the first and the second channel feedback.

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