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公开(公告)号：US20170222706A1
公开(公告)日：2017-08-03
申请号：US15012427
申请日：2016-02-01
Applicant: QUALCOMM Incorporated
Inventor： Chin-Hung Chen , Youhan Kim , Albert van Zelst , Ning Zhang
IPC: H04B7/06 , H04W52/24 , H04B17/318
CPC classification number: H04B7/0626 , H04B7/0617 , H04B17/318 , H04L25/0204 , H04L25/0228 , H04W52/241 , H04W84/12
Abstract: A method of adjusting single-stream transmissions by a wireless device based on channel state information (CSI). The wireless device generates a sounding packet formatted for transmission via multiple spatial streams, and transmits the sounding packet to a receiving device via a single one of the multiple spatial streams. For example, the wireless device may be a single-antenna device. The wireless device further receives channel state information (CSI) from the receiving device based at least in part on the sounding packet. The wireless device then adjusts one or more characteristics of single-stream transmissions to the receiving device based at least in part on the received CSI.
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公开(公告)号：US20170134989A1
公开(公告)日：2017-05-11
申请号：US14936087
申请日：2015-11-09
Applicant: QUALCOMM Incorporated
Inventor： Olaf Josef Hirsch , James Simon Cho , Ning Zhang , Alireza Raissinia , Youhan Kim , Kapil Rai
CPC classification number: H04W28/26 , H04W74/08 , H04W74/0816
Abstract: Methods, systems, and devices are described for supporting simultaneous (e.g., overlapping) data communications by a wireless communication device. More specifically, the described features generally relate to supporting SBS communications by providing mechanisms to help mitigate interference and/or coordinate medium access. One mechanism involves aligning the data communications to mitigate interference. Another mechanism involves using channel reservation signal (e.g., a clear-to-send-to-self (CTS2S) signal) to help maintain simultaneous medium access. Yet another mechanism involves setting a second backoff period for a second channel based at least in part on a first backoff period for a first channel in wireless devices.
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公开(公告)号：US20170078987A1
公开(公告)日：2017-03-16
申请号：US15343114
申请日：2016-11-03
Applicant: QUALCOMM Incorporated
Inventor： James Cho , William McFarland , Ning Zhang
CPC classification number: H04W56/001 , H04J3/0661 , H04J3/0664 , H04J3/067 , H04N21/4305 , H04N21/43615 , H04N21/43637
Abstract: A system and method for closely synchronizing the transmission of real-time data streams is described. Synchronization data is transmitted by a cycle master for receipt by one or more cycle slaves. A cycle slave updates an internal state based on synchronization data received from the cycle master. This internal state may govern reproduction of received real-time data streams by the cycle slave. Such synchronization data may be inserted into transmitted media streams. The cycle slave internal state may be more accurately set by calculating timing differences between the cycle master and cycle slave and periodically adjusting that internal state between receipt of the synchronization data from the cycle master.
Abstract translation: 描述了用于紧密同步实时数据流的传输的系统和方法。 同步数据由循环主站传送，以便由一个或多个循环从站接收。 循环从站根据从循环主站接收的同步数据更新内部状态。 该内部状态可以管理由循环从站接收的实时数据流的再现。 这样的同步数据可以被插入到所传送的媒体流中。 循环从站内部状态可以通过计算循环主站和从站从站之间的定时差异并周期性地调整从循环主站接收到同步数据之间的内部状态来更精确地设置。
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公开(公告)号：US20170052248A1
公开(公告)日：2017-02-23
申请号：US14832089
申请日：2015-08-21
Applicant: QUALCOMM Incorporated
Inventor： Meriam Khufu Ragheb Rezk , Kai Shi , Ning Zhang , Srinivas Jasti , Chao Cheng
CPC classification number: H04B1/123 , G01S7/021 , H04K3/226 , H04K3/822 , H04K2203/18
Abstract: A method and apparatus are disclosed for searching for a radar signal within signals received by a wireless device. The wireless device may receive signals within a first frequency segment and a second frequency segment, which is adjacent to the first frequency segment. The wireless device may determine Fast Fourier Transform (FFT) bins associated with the first frequency segment and the second frequency segment. The wireless device may combine the FFT bins associated with the first frequency segment and the second frequency segment and may search for the radar signal within the combined FFT bins.
Abstract translation: 公开了一种用于在由无线设备接收的信号内搜索雷达信号的方法和装置。 无线设备可以在与第一频率段相邻的第一频率段和第二频率段内接收信号。 无线设备可以确定与第一频率段和第二频率段相关联的快速傅里叶变换（FFT）仓。 无线设备可以组合与第一频段和第二频段相关联的FFT频段，并且可以在组合的FFT频段内搜索雷达信号。
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公开(公告)号：US09557407B1
公开(公告)日：2017-01-31
申请号：US14832089
申请日：2015-08-21
Applicant: QUALCOMM Incorporated
Inventor： Meriam Khufu Ragheb Rezk , Kai Shi , Ning Zhang , Srinivas Jasti , Chao Cheng
CPC classification number: H04B1/123 , G01S7/021 , H04K3/226 , H04K3/822 , H04K2203/18
Abstract: A method and apparatus are disclosed for searching for a radar signal within signals received by a wireless device. The wireless device may receive signals within a first frequency segment and a second frequency segment, which is adjacent to the first frequency segment. The wireless device may determine Fast Fourier Transform (FFT) bins associated with the first frequency segment and the second frequency segment. The wireless device may combine the FFT bins associated with the first frequency segment and the second frequency segment and may search for the radar signal within the combined FFT bins.
Abstract translation: 公开了一种用于在由无线设备接收的信号内搜索雷达信号的方法和装置。 无线设备可以在与第一频率段相邻的第一频率段和第二频率段内接收信号。 无线设备可以确定与第一频率段和第二频率段相关联的快速傅里叶变换（FFT）仓。 无线设备可以组合与第一频段和第二频段相关联的FFT频段，并且可以在组合的FFT频段内搜索雷达信号。
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Patent Agency Ranking
公开(公告)号：US20160330640A1
公开(公告)日：2016-11-10
申请号：US15216574
申请日：2016-07-21
Applicant: QUALCOMM Incorporated
Inventor： Kai Shi , James Simon Cho , Ning Zhang
Abstract: Systems and methods are provided for preferentially locating a candidate channel likely to have an active network during a WLAN scanning process. A portion of a first incoming packet on a first wireless channel is received and analyzed to determine whether an active network is available on the first wireless channel. The reception of the first incoming packet is selectively aborted based at least in part on the analysis. The portion of the first incoming packet may be a header of the first incoming packet. The reception of the first incoming packet may be aborted in response to a trigger condition. The trigger condition may correspond to a determination that the first incoming packet is not a packet of interest, a determination that the first incoming packet is not a beacon, or a determination that a signal strength on the first incoming packet is below a threshold level.
Abstract translation: 提供了系统和方法，用于在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。 接收并分析第一无线信道上的第一输入分组的一部分以确定在第一无线信道上活动网络是否可用。 至少部分地基于分析，选择性地中止第一输入分组的接收。 第一输入分组的部分可以是第一输入分组的报头。 响应于触发条件可以中止第一传入分组的接收。 触发条件可以对应于第一输入分组不是感兴趣的分组，确定第一输入分组不是信标的确定，或者确定第一输入分组上的信号强度低于阈值水平。
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公开(公告)号：US20160150500A1
公开(公告)日：2016-05-26
申请号：US14939278
申请日：2015-11-12
Applicant: QUALCOMM Incorporated
Inventor： Meghna Agrawal , Ning Zhang , Xiaoxin Zhang , Youhan Kim , Praveen Dua , Carlos Horacio Aldana
CPC classification number: H04L5/0007 , H04L1/1685 , H04L1/18 , H04L1/1854 , H04L1/1896 , H04L2001/0093 , H04W84/12
Abstract: Methods and apparatuses are disclosed that may perform simultaneous ranging operations between a requester device and each of a plurality of target devices using OFDMA-based frame exchanges while maintaining a level of accuracy comparable to ranging operations that do not use OFDMA-based frame exchanges. Tone interleaving may be used so that the ranging devices may estimate channel conditions for the full frequency spectrum of the wireless medium. For example, a unique set of two or more non-adjacent groups of OFDM sub-carrier frequencies may be allocated to each of the plurality of target devices for ranging operations.
Abstract translation: 公开了可以使用基于OFDMA的帧交换在请求者设备和多个目标设备中的每一个之间执行同时测距操作的方法和设备，同时保持与不使用基于OFDMA的帧交换的测距操作相当的准确度。 可以使用音调交织，使得测距设备可以估计无线介质的全频谱的信道条件。 例如，可将两个或更多个非相邻OFDM子载波频率组的唯一集合分配给多个目标设备中的每一个用于测距操作。
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公开(公告)号：US09332383B2
公开(公告)日：2016-05-03
申请号：US14345941
申请日：2012-09-19
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxin Zhang , Ning Zhang
CPC classification number: H04W4/02 , G01S5/021 , G01S5/14 , G01S13/876
Abstract: A TOA positioning system can be implemented that employs a calculated initial location of a wireless network device. For each of a plurality of reference wireless network devices, a distance between the wireless network device and the reference wireless network device is determined based, at least in part, on a round trip transit time between the wireless network device and the reference wireless network device. An initial location of the wireless network device can be calculated based, at least in part, on a location of each of the plurality of reference wireless network devices. A location of the wireless network device can be estimated based, at least in part, on the calculated initial location, the distance to each of the reference wireless network devices, and an initial distance calibration constant.
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公开(公告)号：US09204394B2
公开(公告)日：2015-12-01
申请号：US13797608
申请日：2013-03-12
Applicant: QUALCOMM Incorporated
Inventor： Zhanfeng Jia , David Su , Ning Zhang , Kai Shi
IPC: H04W52/02
CPC classification number: H04W52/0229 , Y02D70/00 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/162
Abstract: A wake-up radio is configured to scan for transmissions while the radio receiver is in sleep mode. The wake-up radio detects incoming RF transmissions intended for the radio receiver by analyzing data frame characteristics in an incoming RF transmission. The data frame characteristics may contain a signature code that is unique to the radio receiver. The signature code may be based on the time duration of a sequence of orthogonal frequency division multiplex (OFDM) symbols received in a clear to send to self (CTS2S) transmission or a time duration of short interframe spaces (SIFS) used to transmit the data frames.
Abstract translation: 唤醒无线电被配置为在无线电接收机处于睡眠模式时扫描传输。 唤醒无线电通过分析进入RF传输中的数据帧特性来检测用于无线电接收机的进入RF传输。 数据帧特征可以包含无线电接收机唯一的签名代码。 签名代码可以基于在清除发送到自身（CTS2S）传输中接收的正交频分复用（OFDM）符号的序列的持续时间或用于发送数据的短帧间间隔（SIFS）的持续时间 框架。
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公开(公告)号：US09143967B2
公开(公告)日：2015-09-22
申请号：US14322800
申请日：2014-07-02
Applicant: QUALCOMM Incorporated
Inventor： Qifan Chen , Kai Shi , Ning Zhang
CPC classification number: H04W24/08 , G01S7/40 , G01S13/765 , H04J3/0667
Abstract: A method and apparatus for improving the accuracy of a round trip time (RTT) estimate between a first device and a second device are disclosed. The method involves calculating an acknowledgement correction factor and a unicast correction factor. These correction factors are used to compensate for symbol boundary time errors resulting from multipath effects.
Abstract translation: 公开了一种用于提高第一设备和第二设备之间的往返时间（RTT）估计精度的方法和设备。 该方法涉及计算确认校正因子和单播校正因子。 这些校正因子用于补偿由多径效应引起的符号边界时间误差。
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