Techniques for use in wideband time-of-arrival estimation

    公开(公告)号:US09939521B2

    公开(公告)日:2018-04-10

    申请号:US14593864

    申请日:2015-01-09

    Abstract: Provided are apparatus and methods for ranging between a plurality of wireless devices. An exemplary method includes, at a first wireless device, transmitting a primary portion symbol comprising a first packet and transmitting a secondary portion symbol. The secondary portion symbol is transmitted simultaneously at a lower transmit power than the primary portion symbol, and the secondary portion symbol comprises a second packet identical to the first packet. The primary portion symbol can be transmitted in a first channel having a substantially 20 MHZ bandwidth and the secondary portion can be transmitted in a second channel having a substantially 20 MHZ bandwidth. The first and second channels are substantially adjacent in frequency. After transmitting the primary portion symbol, for example, a high-throughput long-training-field symbol or a very-high-throughput long-training-field symbol can be repetitively transmitted. This exemplary method enhances time-of-arrival estimation accuracy, minimizes decoding bottlenecking, and maximizes wireless device range.

    VISUAL INERTIAL ODOMETRY ATTITUDE DRIFT CALIBRATION
    34.
    发明申请
    VISUAL INERTIAL ODOMETRY ATTITUDE DRIFT CALIBRATION 审中-公开
    可视化实际的ODOMETRY态度标定

    公开(公告)号:US20170031032A1

    公开(公告)日:2017-02-02

    申请号:US15078862

    申请日:2016-03-23

    Abstract: Disclosed embodiments pertain to a method on a UE may comprise determining a first absolute position of the UE at a first time based on GNSS measurements from a set of satellites. At a second time subsequent to the first time, the UE may determine a first estimate of displacement of the UE relative to the first absolute position using non-GNSS measurements. Further, at the second time, the UE may also determine a second estimate of displacement relative to the first absolute position and/or a second absolute position of the UE based, in part, on: the GNSS carrier phase measurements at the first time from the set of satellites, and GNSS carrier phase measurements at the second time from a subset comprising two or more satellites of the set of satellites, and the first estimate of displacement of the UE.

    Abstract translation: 公开的实施例涉及一种在UE上的方法可以包括基于来自一组卫星的GNSS测量来确定UE在第一时间的第一绝对位置。 在第一次之后的第二时间,UE可以使用非GNSS测量来确定UE相对于第一绝对位置的位移的第一估计。 此外,在第二时间,UE还可以部分地基于以下来确定相对于UE的第一绝对位置和/或第二绝对位置的位移的第二估计:第一时间的GNSS载波相位测量 所述卫星组以及来自包括卫星组的两个或更多个卫星的子集的第二时间的GNSS载波相位测量以及UE的位移的第一估计。

    Clear-to-send signaling to limit WiFi interference in unlicensed spectrum
    35.
    发明授权
    Clear-to-send signaling to limit WiFi interference in unlicensed spectrum 有权
    清除发送信令以限制无许可频谱中的WiFi干扰

    公开(公告)号:US09526111B2

    公开(公告)日:2016-12-20

    申请号:US14334585

    申请日:2014-07-17

    Abstract: Methods, apparatuses, systems, and devices are described for wireless communication in an unlicensed spectrum. In one method, a clear-to-send (CTS) signal may be employed to manage or otherwise limit potential interference for communications in the unlicensed spectrum. For example, communications using long term evolution (LTE) may employ an unlicensed spectrum, particularly for small cell deployment. In such case, the LTE communications may be protected from interference due to communications by other networks, such as WiFi, using the unlicensed spectrum.

    Abstract translation: 描述了用于非许可频谱中的无线通信的方法,设备,系统和设备。 在一种方法中,可以采用清除发送(CTS)信号来管理或以其他方式限制在未许可频谱中的通信的潜在干扰。 例如,使用长期演进(LTE)的通信可以采用非许可频谱,特别是对于小型小区部署。 在这种情况下,可以通过使用未许可频谱的其他网络(例如WiFi)的通信来保护LTE通信免受干扰。

    Methods and apparatus for synchronously coded subcarriers in OFDMA systems
    36.
    发明授权
    Methods and apparatus for synchronously coded subcarriers in OFDMA systems 有权
    OFDMA系统中同步编码子载波的方法和装置

    公开(公告)号:US09462581B2

    公开(公告)日:2016-10-04

    申请号:US13653274

    申请日:2012-10-16

    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a serving base station. The serving base station receives channel feedback from a plurality of UEs. The channel feedback is based on predetermined phase rotations used by the serving base station. The serving base station selects at least one UE of the UEs for a data transmission based on the received channel feedback. The serving base station maps at least one data stream to a set of resource blocks. The serving base station transmits the set of resource blocks to the at least one UE with a phase rotation determined based on the predetermined phase rotations.

    Abstract translation: 提供了一种用于无线通信的方法,装置和计算机程序产品。 该装置可以是服务基站。 服务基站从多个UE接收信道反馈。 信道反馈基于由服务基站使用的预定相位旋转。 服务基站基于接收的信道反馈来选择UE中的至少一个用于数据传输的UE。 服务基站将至少一个数据流映射到一组资源块。 服务基站将基于预定相位旋转确定的相位旋转的资源块集合发送给至少一个UE。

    DSRC LISTEN MODE FOR WI-FI USING DSRC SPECTRUM
    37.
    发明申请
    DSRC LISTEN MODE FOR WI-FI USING DSRC SPECTRUM 有权
    DSRC使用DSRC频谱的DSRC监听模式

    公开(公告)号:US20140357193A1

    公开(公告)日:2014-12-04

    申请号:US14286565

    申请日:2014-05-23

    Abstract: Methods, systems, and devices are described for detecting dedicated short range communications (DSRC) transmissions to determine whether to use at least a portion of the DSRC spectrum. In one embodiment, a multi-mode device may be operated outside of the DSRC spectrum using a first clock rate, and may then be switched to a second clock rate while operating outside of the DSRC spectrum to detect DSRC transmissions using the DSRC spectrum.

    Abstract translation: 描述了用于检测专用短距离通信(DSRC)传输以确定是否使用DSRC频谱的至少一部分的方法,系统和设备。 在一个实施例中,多模式设备可以使用第一时钟速率在DSRC频谱之外操作,然后可以在DSRC频谱之外操作时切换到第二时钟速率,以使用DSRC频谱来检测DSRC传输。

    Visual inertial odometry attitude drift calibration

    公开(公告)号:US10324195B2

    公开(公告)日:2019-06-18

    申请号:US15078862

    申请日:2016-03-23

    Abstract: Disclosed embodiments pertain to a method on a UE may comprise determining a first absolute position of the UE at a first time based on GNSS measurements from a set of satellites. At a second time subsequent to the first time, the UE may determine a first estimate of displacement of the UE relative to the first absolute position using non-GNSS measurements. Further, at the second time, the UE may also determine a second estimate of displacement relative to the first absolute position and/or a second absolute position of the UE based, in part, on: the GNSS carrier phase measurements at the first time from the set of satellites, and GNSS carrier phase measurements at the second time from a subset comprising two or more satellites of the set of satellites, and the first estimate of displacement of the UE.

    Location and range determination using broadcast messages

    公开(公告)号:US10291419B2

    公开(公告)日:2019-05-14

    申请号:US14848160

    申请日:2015-09-08

    Abstract: Disclosed are implementations that include a method, at a mobile device, including receiving multiple broadcast messages transmitted by multiple stationary wireless devices, and obtaining first information relating to each of the multiple broadcast messages, with at least some of the first information being included in the multiple broadcast messages, and second information relating to at least one earlier broadcast communication received by at least one of the multiple stationary wireless devices, prior to transmission of the at least one of the multiple broadcast messages, from at least one other of the multiple stationary wireless devices, with the second information included in the at least one of the multiple broadcast messages. The method also include determining location information for the mobile device based on the first information, the second information, and known positions of at least some of the multiple stationary wireless devices.

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