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    POLYPHASE DIGITAL SIGNAL PREDISTORTION IN RADIO TRANSMITTER
    1.
    发明申请
    POLYPHASE DIGITAL SIGNAL PREDISTORTION IN RADIO TRANSMITTER 审中-公开

    公开(公告)号：US20200186103A1

    公开(公告)日：2020-06-11

    申请号：US16637937

    申请日：2017-08-11

    Applicant: NOKIA SOLUTIONS AND NETWORKS OY

    Inventor： Michael WEBER ,  Bjoern JELONNEK ,  Jan HELLMANN

    IPC: H03F1/32 ,  H03F3/24 ,  H04B1/04

    Abstract: A method comprises obtaining a transmission signal to be power-amplified in a power amplifier (361) prior to transmission; separating the transmission signal into two or more polyphase components of the transmission signal; feeding one or more polyphase components of the transmission signal comprised in the two or more polyphase components to each of two or more parallel predistortion circuits (320,321,322); selecting a dedicated predistortion model and dedicated predistortion coefficients for each of the two or more parallel predistortion circuits (320,321,322); performing non-linear memory-based modeling on the transmission signal according to the selected dedicated predistortion models and coefficients using the one or more polyphase components; and combining output signals of the two or more parallel predistortion circuits (320,321,322) to form a predistorted transmission signal (y[n]) to be applied to the power amplifier (361).

    CFR ERROR DEPOSITION OUT OF THE TRANSMISSION BAND
    2.
    发明申请
    CFR ERROR DEPOSITION OUT OF THE TRANSMISSION BAND 有权

    公开(公告)号：US20230111822A1

    公开(公告)日：2023-04-13

    申请号：US17962801

    申请日：2022-10-10

    Applicant: NOKIA SOLUTIONS AND NETWORKS OY

    Inventor： Gunter WOLFF ,  Radoslaw CESZKIEL ,  Grzegorz HAZA ,  Björn JELONNEK ,  Michael WEBER

    IPC: H04B1/00 ,  H04B1/04

    Abstract: An apparatus comprises a digital processing device configured to generate a digital transmission signal, a digital-to-analog converter connected to the digital processing device and configured to convert the digital transmission signal into an analog transmission signal, and a power amplifier connected to the digital-to-analog converter and configured to amplify the analog transmission signal. An antenna filter is connected to the power amplifier and configured to filter the amplified analog transmission signal; the antenna filter is configured to pass frequencies in at least one passband and to attenuate frequencies in at least one stopband. The digital processing device is configured to perform a process of reducing peak power in the digital transmission signal; in this process error components having different frequencies are produced. A frequency spectrum of the error components is manipulated such that a part of the error components is deposited in the stopband of the antenna filter.

    BIT RATE COMPRESSION FOR SIGNAL TRANSMISSION
    3.
    发明申请
    BIT RATE COMPRESSION FOR SIGNAL TRANSMISSION 审中-公开

    公开(公告)号：US20180212632A1

    公开(公告)日：2018-07-26

    申请号：US15415461

    申请日：2017-01-25

    Applicant: NOKIA SOLUTIONS AND NETWORKS OY

    Inventor： Armin FUCHS ,  Bjoern JELONNEK ,  Michael WEBER

    IPC: H04B1/04 ,  H04L29/06

    CPC classification number: H04B1/0483 ,  H04B1/0475 ,  H04B2001/0425 ,  H04L69/04

    Abstract: Various antennas may benefit from improved signaling. For example, it may be helpful for a signal in a high occupied bandwidth environment to be compressed using a block floating point format, which can also help to reduce power consumption. A method may include separating an incoming signal at a digital front end or a converter into two alternating signals comprising a coarse signal and a fine signal. The method may also include transmitting the coarse signal and the fine signal from the digital front end to the converter or from the converter to the digital front end. The coarse signal and the fine signal may be combined to generate an approximation of the incoming signal.

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