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    Interference mitigation
    5.
    发明授权
    Interference mitigation 有权

    公开(公告)号：US11165455B2

    公开(公告)日：2021-11-02

    申请号：US16091850

    申请日：2018-05-16

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Ulf Gustavsson ,  Erik G. Larsson ,  Christopher Mollén

    IPC分类号： H04B1/10 ,  H04B1/12 ,  H04B1/04 ,  H04B1/525 ,  H04B1/7097

    摘要： A method is disclosed of a wireless receiver configured for spatial selective reception. The method is for mitigation of an interfering signal leaked into a frequency range of a desired signal due to non-linearity of hardware components of the receiver.
    The method comprises receiving a composite signal comprising the desired signal and the interfering signal, filtering the composite signal using a spatial filter for a channel response of the desired signal to provide a first intermediate signal component, and filtering the composite signal using a spatial filter for a channel response of the interfering signal to provide a second intermediate signal component.
    The method also comprises estimating a squared amplitude of the interfering signal based on the second intermediate signal component and a model of the non-linearity, and estimating the desired signal based on the first intermediate signal component, the estimated squared amplitude of the interfering signal, and the model of the non-linearity.
    Corresponding apparatus, wireless receiver, wireless communication device and computer program product are also disclosed.

    Detecting distortion in spread spectrum signals
    6.
    发明授权
    Detecting distortion in spread spectrum signals 有权

    公开(公告)号：US11146307B1

    公开(公告)日：2021-10-12

    申请号：US16846991

    申请日：2020-04-13

    申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

    发明人： John Borkenhagen ,  Christopher Steffen ,  Grant P. Kesselring

    IPC分类号： H04B1/7097

    摘要： The invention relates to a method, a circuit, and an apparatus for detecting distortion in spread spectrum signals. An edge in a spread spectrum clock signal is identified based on a reference clock signal. The edge data is then provided to a set of counters which are incremented corresponding to an identified edge. Each bit of a respective output of the counters are provided to a respective OR gate of a set of OR gates. An OR gate from the set of OR gates corresponding to a selected bit then outputs an indication of whether distortion exists in the spread spectrum clock signal.

    Method for wireless communication between subscribers and base stations
    8.
    发明授权
    Method for wireless communication between subscribers and base stations 有权

    公开(公告)号：US11115975B2

    公开(公告)日：2021-09-07

    申请号：US16976116

    申请日：2019-02-21

    申请人： Obshchestvo s ogranichennoy otvetstvennostyu “RadioTekh”

    发明人： Sergey Alexandrovich Kosarev

    IPC分类号： H04W72/04 ,  H04B1/7097 ,  H04B1/715 ,  H04W72/00

    摘要： In a wireless communication method, base stations having an identical number of channels for receiving narrowband modulation (UNB) are divided into groups. Data transmission channels of all base stations have identical time and frequency characteristics. All subscribers split into groups are periodically sent messages with subscriber group numbers by all the base stations. When a group number of a corresponding subscriber coincides with a group number in a message received by the subscriber, all the subscribers of the group send response messages to the base stations using UNB, wherein response messages are sent sequentially from all subgroups of subscribers of the group, and subscribers of a subgroup send response messages on different frequencies. The base stations receive the response messages on all frequencies corresponding to subscribers, decode the messages and generate a database of response messages, which can be used for generating subsequent messages with corresponding subscriber group numbers.