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    Secure training sequence symbol structure
    81.
    发明授权
    Secure training sequence symbol structure 有权

    公开(公告)号：US10924303B2

    公开(公告)日：2021-02-16

    申请号：US16291973

    申请日：2019-03-04

    Applicant: Apple Inc.

    Inventor： Anuj Batra ,  Joachim S. Hammerschmidt ,  Eren Sasoglu

    IPC: H04L25/02 ,  H04L9/06 ,  H04L9/08 ,  H04L25/03 ,  H04B1/711 ,  H04B7/0413 ,  G06F7/58 ,  H04L25/49 ,  H04B1/69 ,  H04B1/7163 ,  H04L9/12

    Abstract: A secure training sequence (STS) is included in wireless packets communicated between electronic devices to assist with channel estimation and wireless ranging. The STS includes multiple STS segments generated based on outputs from a cryptographically secure pseudo-random number generator (CSPRNG), the STS segments being separated by guard intervals and formatted in accordance with an 802.15.4 data symbol format that uses burst position modulation (BPM) and binary phase shift keying (BPSK) to map bits from the CSPRNG to burst positions and pulse polarities for the STS symbols. Both a first electronic device, which generates the STS, and a second electronic device, which estimates a communication channel using the STS, have prior private knowledge of cryptographic keys required to generate a non-repetitive single-use pseudo-random (PR) sequence by the CSPRNG. The STS includes two burst position intervals per STS symbol and two possible burst positions within each burst position interval.

    Channel probing signal for a broadband communication system
    82.
    发明授权
    Channel probing signal for a broadband communication system 有权

    公开(公告)号：US10771302B2

    公开(公告)日：2020-09-08

    申请号：US15953950

    申请日：2018-04-16

    Applicant: Neo Wireless LLC

    Inventor： Xiaodong Li ,  Titus Lo ,  Kemin Li ,  Haiming Huang

    IPC: H04L12/26 ,  H04L27/26 ,  H04L5/00 ,  H04L25/03 ,  H04L27/00 ,  H04B1/707 ,  H04B1/711 ,  H04L25/02

    Abstract: In a broadband wireless communication system, a spread spectrum signal is intentionally overlapped with an OFDM signal, in a time domain, a frequency domain, or both. The OFDM signal, which inherently has a high spectral efficiency, is used for carrying broadband data or control information. The spread spectrum signal, which is designed to have a high spread gain for overcoming severe interference, is used for facilitating system functions such as initial random access, channel probing, or short messaging. Methods and techniques are devised to ensure that the mutual interference between the overlapped signals is minimized to have insignificant impact on either signal and that both signals are detectable with expected performance by a receiver.

    SYSTEMS AND METHODS FOR SIGNAL ISOLATION IN RADIO FREQUENCY CIRCUIT BOARDS
    84.
    发明申请
    SYSTEMS AND METHODS FOR SIGNAL ISOLATION IN RADIO FREQUENCY CIRCUIT BOARDS 审中-公开

    公开(公告)号：US20200052737A1

    公开(公告)日：2020-02-13

    申请号：US16522064

    申请日：2019-07-25

    Applicant: Ball Aerospace & Technologies Corp.

    Inventor： Zachary T. Miers ,  Ray Lovestead ,  Peter J. Moosbrugger

    IPC: H04B3/32 ,  H04B3/30 ,  H04B1/12 ,  H04B1/711 ,  H04B1/10

    Abstract: Systems and methods for isolating radio frequency (RF) signals in high frequency circuit assemblies, including but not limited to 5G communication systems, are provided. The circuit assemblies include an RF suppression structure, which can be in the form of a low ohm resistor, that extends across a transmission line, and that has contacts that are electrically joined to a ground plane. Alternatively or in addition, the circuit assemblies include a low ohm resistor that extends over a transition between a signal via and an end of a transmission line, and that has contacts that are electrically joined to a ground plane. A circuit assembly as disclosed herein can further include multiple low ohm resistors spaced apart from one another by a distance that is a fraction of a wavelength of a highest frequency signal carried by the transmission line.

    Advanced backhaul services
    88.
    发明授权
    Advanced backhaul services 有权

    公开(公告)号：US09876530B2

    公开(公告)日：2018-01-23

    申请号：US14666294

    申请日：2015-03-23

    Applicant: SKYLINE PARTNERS TECHNOLOGY LLC

    Inventor： Kevin J. Negus ,  James A. Proctor, Jr.

    IPC: H04B1/00 ,  H04B1/711 ,  H04W24/02 ,  H04B1/04 ,  H04B7/06 ,  H04W24/08 ,  H04B7/0413

    CPC classification number: H04B1/711 ,  H04B1/0475 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0632 ,  H04B7/0634 ,  H04W24/02 ,  H04W24/08

    Abstract: “Tiered” groups of devices (tiered service radios) and/or licenses associated with the devices or users so as to provide a hieratical set of interference protection mechanisms for members of each tier of service are disclosed. Point-to-point and point-to-multipoint data links for any communication application, including wireless backhaul applications, are also disclosed. Exemplary systems, devices, and methods disclosed herein allow for the efficient operation of such a tiered service. Interference protection among tiered service devices belonging to one or more tiers of the service, from other devices within the same tier of service, or devices of other tiers of service, is disclosed. Identification of other devices of the same or differing tiers of service, and interference mitigation between other tiered service devices based upon intercommunication between the devices, and/or via a central registry database, are also disclosed.

    SATELLITE RADIO SIGNAL RECEIVER, ELECTRONIC TIMEPIECE, DATE AND TIME ACQUIRING METHOD AND RECORDING MEDIUM
    90.
    发明申请
    SATELLITE RADIO SIGNAL RECEIVER, ELECTRONIC TIMEPIECE, DATE AND TIME ACQUIRING METHOD AND RECORDING MEDIUM 审中-公开
    卫星无线电信号接收器，电子时钟，日期和时间获取方法和记录介质

    公开(公告)号：US20160380672A1

    公开(公告)日：2016-12-29

    申请号：US15075677

    申请日：2016-03-21

    Applicant: CASIO COMPUTER CO., LTD.

    Inventor： Hideo ABE ,  Takeshi MATSUE

    IPC: H04B1/711 ,  H04L25/03 ,  H04B1/7073

    CPC classification number: H04L25/03292 ,  H04L25/03019 ,  H04L25/067

    Abstract: A satellite radio signal receiver includes a receiving section which receives radio signals from satellites and demodulates the signals to identify bits of the demodulated signals as received bits; and a processor. The processor compares each received bit of the satellites with estimated bits which are estimated to be received within a possible deviation range from a current date and time acquired as a reception timing of the received bit to obtain comparison result information between the received bits and the estimated bits in relation to deviations within the possible deviation range with respect to each of the satellites, integrates the comparison result information on the received bits of the satellites, specifies a deviation that satisfies a match condition of the received bits and the estimated bits based on the integrated comparison result information, and acquires date and time information based on the deviation that satisfies the match condition.

    Abstract translation: 卫星无线电信号接收机包括接收来自卫星的无线电信号的接收部分，并且解调该信号以识别解调信号的比特作为接收比特; 和处理器。 处理器将每个接收到的卫星的比特与估计的比特相比估计的比特，该估计比特在与作为接收比特的接收定时获取的当前日期和时间的可能的偏差范围内被接收，以获得所接收的比特之间的比较结果信息， 将相对于每个卫星的可能的偏差范围内的偏差相关的比特集合在卫星的接收比特上的比较结果信息，指定满足接收比特和估计比特的匹配条件的偏差，基于 集成比较结果信息，并且基于满足匹配条件的偏差来获取日期和时间信息。

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