公开(公告)号：WO2019089207A1

公开(公告)日：2019-05-09

申请号：PCT/US2018/055568

申请日：2018-10-12

Applicant: QUALCOMM INCORPORATED

Inventor： YANG, Lin ,  TIAN, Bin ,  CHEN, Jiang Li ,  VERMA, Lochan ,  VERMANI, Sameer ,  ZHANG, Ning ,  SHI, Kai ,  KIM, Youhan ,  JONES IV, Vincent Knowles

IPC: H04L1/00 ,  H04L5/00

Abstract: Aspects of the present disclosure provide techniques for interleaving in single user (SU) preamble puncturing in wireless local area networks (WLANs). In one implementation, an access point (AP) 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.

公开(公告)号：WO2017165606A1

公开(公告)日：2017-09-28

申请号：PCT/US2017/023742

申请日：2017-03-23

Applicant: QUALCOMM INCORPORATED

Inventor： ZHANG, Ning ,  ZHANG, Xiaoxin ,  SHI, Kai

IPC: H04L27/26 ,  H04L25/02

Abstract: 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.

Abstract translation: 本公开提供了用于在上行链路（UL）信道和下行链路（DL）信道上选择用于传输正交频分复用（OFDM）符号的保护间隔的系统，方法和装置。 在一些实现中，发送设备和接收设备可以估计彼此的发送信道的信道延迟扩展（CDS）信息，彼此交换估计的CDS信息，并且基于彼此交换的估计的CDS信息来选择保护间隔 。 发送设备可以在UL信道上将选择的保护间隔分离的多个OFDM符号发送到接收设备，并且接收设备可以在DL信道上将选择的保护间隔分离的多个OFDM符号发送到发送设备

公开(公告)号：WO2014158781A1

公开(公告)日：2014-10-02

申请号：PCT/US2014/020119

申请日：2014-03-04

Applicant: QUALCOMM INCORPORATED

Inventor： SHI, Kai ,  HUSTED, Paul ,  ZHANG, Ning

IPC: H04L25/02 ,  H04B7/08 ,  H04W52/02

CPC classification number: H04W52/028 ,  H04B7/0857 ,  H04B7/0871 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0296 ,  H04L25/06 ,  H04W52/0245 ,  Y02D70/142 ,  Y02D70/444

Abstract: A single receive chain of a MIMO receiver is activated during a low power listen mode. Upon detecting a legacy short training field (L-STF) in a received packet, the single receive chain performs a first frequency estimation, and activates one or more additional receive chains of the MIMO receiver. The MIMO receiver uses maximal ratio combining (MRC) to receive the signal using the first receive chain and the one or more additional activated receive chains, wherein the MRC is based, at least in part, on the first frequency estimation. The MIMO receiver may determine whether the received packet is a high throughput/very high throughput (HT/VHT) packet, and if not, deactivate the one or more additional receive chains. In one alternative, the additional receive chains are not activated until determining that a HT/VHT packet has been received.

Abstract translation: MIMO接收机的单个接收链在低功率监听模式下被激活。 在接收到的分组中检测到遗留短训练场（L-STF）时，单个接收链执行第一频率估计，并激活MIMO接收机的一个或多个附加接收链。 MIMO接收机使用最大比率组合（MRC）来使用第一接收链和一个或多个附加的激活的接收链接收信号，其中MRC至少部分地基于第一频率估计。 MIMO接收机可以确定所接收的分组是高吞吐量/非常高吞吐量（HT / VHT）分组，如果不是，则去激活一个或多个附加的接收链。 在一个替代方案中，在确定已经接收到HT / VHT分组之前，不激活额外的接收链。

公开(公告)号：WO2013101684A1

公开(公告)日：2013-07-04

申请号：PCT/US2012/071079

申请日：2012-12-20

Applicant: QUALCOMM INCORPORATED

Inventor： YUCEK, Tevfik ,  SHI, Kai ,  GULASEKARAN, Susinder, Rajan ,  MOSKO, Richard, Melvin, Jr.

IPC: G01S7/02 ,  H04B1/10

CPC classification number: G01S7/021 ,  H04K3/226 ,  H04K3/822 ,  H04K2203/18 ,  H04L27/2633

Abstract: ABSTRACT A method of identifying radar in a wireless device includes detecting an event corresponding to receipt of a signal by the wireless device. The event can include an analog to digital converter (ADC) saturation, a radio frequency (RF) saturation, and/or an ADC power high condition. Notably, the gain change in the wireless device is delayed for a first predetermined time period. Data preceding the event for the first predetermined time period can be buffered. A first low-resolution fast Fourier transform (FFT), wherein low-resolution FFTs are referred to as short FFTs, can be performed with the buffered data. The first short FFT can be processed. When results of the processing indicate the signal is radar, the radar can then be identified.

Abstract translation: 摘要一种在无线设备中识别雷达的方法包括：检测与无线设备接收的信号相对应的事件。 该事件可以包括模数转换器（ADC）饱和，射频（RF）饱和和/或ADC功率高电平状态。 值得注意的是，无线设备中的增益改变延迟了第一预定时间段。 可以缓冲在第一预定时间段之前的事件之前的数据。 可以使用缓冲的数据来执行第一低分辨率快速傅里叶变换（FFT），其中低分辨率FFT被称为短FFT。 可以处理第一个短FFT。 当处理结果表明信号是雷达时，可以识别雷达。

公开(公告)号：WO2019006385A1

公开(公告)日：2019-01-03

申请号：PCT/US2018/040423

申请日：2018-06-29

Applicant: QUALCOMM INCORPORATED

Inventor： SHI, Kai ,  TIAN, Bin ,  KIM, Youhan ,  NANDA, Rashmi ,  VERMA, Lochan ,  ZHANG, Ning

IPC: H04W72/04 ,  H04L5/00 ,  H04W84/12

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for sub-channel selection in a wireless network. In one aspect, a first message is generated at a first electronic device of a wireless network in response to a number of electronic devices of a wireless network being less than a threshold number. The first message indicates particular sub-channels of a transmission band that are to be used for a transmission in a single user (SU) mode of operation to a second electronic device of the wireless network. The method further includes sending the first message to the second electronic device. The first message indicates that a second message is to be sent to the second electronic device using the particular sub-channels. The method further includes sending the second message to the second electronic device via the transmission using the particular sub-channels.

公开(公告)号：WO2015009469A1

公开(公告)日：2015-01-22

申请号：PCT/US2014/045521

申请日：2014-07-07

Applicant: QUALCOMM INCORPORATED

Inventor： DU, Shu ,  ZHANG, Ning ,  XIE, Zhen ,  CHO, James, Simon ,  CHEN, Chin-Hung ,  SHI, Kai

IPC: H04W76/02 ,  H04W84/04 ,  H04W88/10 ,  H04L12/725 ,  H04L12/851 ,  H04L29/06

CPC classification number: H04W16/26 ,  H04L45/304 ,  H04L47/24 ,  H04W28/0205 ,  H04W76/15 ,  H04W84/047 ,  H04W84/12 ,  H04W88/10

Abstract: Methods, systems, devices, and apparatuses are described for wireless communications in which first type of traffic may be transmitted from a gateway access point (AP) directly to a station. Beacon signals transmitted to the station are transmitted as part of the first type of traffic. A second type of traffic may be transmitted from the gateway AP to the station via at least one relay AP. The first type of traffic may include low-throughput traffic and may be transmitted over a long-range radio link ( e.g. , 2 GHz band link or sub-1 GHz band link). The second type of traffic may include high-throughput traffic and may be transmitted over at least one short-range radio link ( e.g. , 5 GHz band link). The gateway AP may receive low-throughput traffic directly from the station and high-throughput traffic from the station via the at least one relay AP.

Abstract translation: 对无线通信描述了方法，系统，设备和装置，其中第一类型的业务可以从网关接入点（AP）直接发送到站。 发送到站的信标信号作为第一类型的业务的一部分被传输。 第二类型的业务可以经由至少一个中继AP从网关AP发送到站。 第一类型的业务可以包括低吞吐量业务，并且可以通过远程无线电链路（例如，2GHz频带链路或子1GHz频带链路）来传输。 第二类型的业务可以包括高吞吐量业务，并且可以通过至少一个短距离无线电链路（例如，5GHz频带链路）来传送。 网关AP可以直接从站接收低吞吐量业务，并经由至少一个中继AP接收来自站的高吞吐量流量。

公开(公告)号：WO2014209876A1

公开(公告)日：2014-12-31

申请号：PCT/US2014/043640

申请日：2014-06-23

Applicant: QUALCOMM INCORPORATED

Inventor： SHI, Kai ,  CHO, James Simon ,  ZHANG, Ning

IPC: H04W48/16

CPC classification number: H04W24/08 ,  H04L69/22 ,  H04W24/10 ,  H04W40/244 ,  H04W48/16 ,  H04W84/12

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2013074424A1

公开(公告)日：2013-05-23

申请号：PCT/US2012/064524

申请日：2012-11-09

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Qifan ,  SHI, Kai ,  ZHANG, Ning

IPC: H04W64/00 ,  G01S5/02 ,  H04J3/06

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）估计的准确性的方法和设备。 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多径效应导致的符号边界时间误差。

公开(公告)号：WO2018111518A1

公开(公告)日：2018-06-21

申请号：PCT/US2017/063093

申请日：2017-11-22

Applicant: QUALCOMM INCORPORATED

Inventor： HU, Zixia ,  KIM, Youhan ,  SHI, Kai

IPC: H04L25/02 ,  H04W84/12

CPC classification number: H04L25/0202 ,  H04B1/16 ,  H04L27/01 ,  H04L27/261 ,  H04W84/12

Abstract: A receiver includes power estimation circuitry configured to estimate a first power associated with a first field of a packet and a second power associated with a second field of the packet. The receiver additionally includes channel estimation circuitry configured to determine a second channel estimation of a channel associated with communication of the packet. The second channel estimation is determined based on the first power, the second power, and a first channel estimation of the channel.

公开(公告)号：WO2015183649A1

公开(公告)日：2015-12-03

申请号：PCT/US2015/031693

申请日：2015-05-20

Applicant: QUALCOMM INCORPORATED

Inventor： HOMCHAUDHURI, Sandip ,  HUSTED, Paul ,  LEE, MeeLan ,  MEHTA, Srenik ,  SHI, Kai ,  ABDOLLAHI-ALIBEIK, Shahram ,  JIA, Zhanfeng ,  KASNAVI, Soraya ,  ZHANG, Ning ,  SU, David, Kuochieh ,  THANDAVESWARAN, Subramania, Sharma ,  GAINEY, Kenneth ,  O'DONNELL, Ian, David

IPC: H04W52/02

CPC classification number: H04W52/0235 ,  G06F1/3206 ,  G06F1/3234 ,  H04W52/0229 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/22

Abstract: Methods, systems, and devices are described for power conservation in a wireless communications system. In embodiments, power conservation may be achieved by adaptively controlling power modes of a wireless communication device, and implementing lower power modes with various modes of the device. According to one aspect, the mode of the device may be a beacon monitoring mode or a delivery traffic indication message (DTIM) mode. In such a mode, the device may receive a portion of a beacon in a first power mode. The device may transition to a second, different (e.g., higher) power mode using information contained in the received portion of the beacon as guidance.

Abstract translation: 描述了无线通信系统中的功率节省的方法，系统和设备。 在实施例中，可以通过自适应地控制无线通信设备的功率模式并且利用设备的各种模式来实现低功率模式来实现功率节省。 根据一个方面，设备的模式可以是信标监控模式或传送业务指示消息（DTIM）模式。 在这种模式中，设备可以以第一功率模式接收信标的一部分。 使用包含在信标的接收部分中的信息作为引导，设备可以转换到第二不同（例如更高）的功率模式。