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    Low complexity non-linear modelling techniques for wireless technologies
    1.
    发明授权
    Low complexity non-linear modelling techniques for wireless technologies 有权

    公开(公告)号：US11575350B2

    公开(公告)日：2023-02-07

    申请号：US16499806

    申请日：2017-04-05

    Applicant: Nokia Solutions and Networks Oy

    Inventor： Shavantha Kularatna ,  Aki Heikki Jalmari Korhonen ,  Christian Reichl

    IPC: H03F1/32 ,  H03F3/24 ,  H04B1/40

    Abstract: Various communication devices may benefit from the appropriate use of modeling techniques. For example, devices that include components that may be driven into non-linear ranges of operation may benefit from low complexity non-linear modelling techniques. Such devices may be used, for example, in wireless communication systems. A method can include obtaining a sample of a signal representative of power consumed by a device while the device is operating in a non-linear range while being driven according to a driving signal. The method can also include computing a correction to the driving signal based on the sample. The correction can be calculated based on a plurality of non-overlapped non-linear sections corresponding to a response of the device. The method can further include applying the correction to adjust the driving signal. The correction can be configured to adjust the power to a desired value of power.

    Monitoring health of a predistortion system
    4.
    发明授权
    Monitoring health of a predistortion system 有权
    监测预失真系统的健康状况

    公开(公告)号：US09226189B1

    公开(公告)日：2015-12-29

    申请号：US14462035

    申请日：2014-08-18

    Applicant: Nokia Solutions and Networks Oy

    Inventor： Shavantha Kularatna ,  Christian Reichl ,  Bjoern Jelonnek ,  Alan Pereira

    IPC: H04W24/10 ,  H04B17/17

    CPC classification number: H04B17/17

    Abstract: At a current time, a current intermodulation content of a predistortion system is determined. An intermodulation ratio is determined using the current intermodulation content and a previous intermodulation content for the predistortion system. The previous intermodulation content is determined at a time previous to the current time. The determined intermodulation ratio is compared with stored intermodulation ratios. A warning is communicated in response to the comparing indicating the predistortion system is unhealthy. Apparatus and computer program products are also disclosed.

    Abstract translation: 在当前时间，确定预失真系统的当前互调内容。 使用当前的互调内容和用于预失真系统的先前的互调内容来确定互调比。 先前的互调内容是在当前时间之前的时间确定的。 将确定的互调比与存储的互调比进行比较。 响应于比较表示预失真系统是不健康的，通知警告。 还公开了装置和计算机程序产品。

    Distance to VSWR Fault Measurement
    5.
    发明申请
    Distance to VSWR Fault Measurement 有权
    与VSWR故障测量的距离

    公开(公告)号：US20150295598A1

    公开(公告)日：2015-10-15

    申请号：US14437908

    申请日：2012-10-25

    Applicant: NOKIA SOLUTIONS AND NETWORKS OY

    Inventor： Jan Hellmann ,  Marko Fleischer ,  Norbert Hueller ,  Christian Reichl ,  Michael Kronwald

    IPC: H04B1/04 ,  H04B17/10 ,  H04L5/14

    CPC classification number: H04B1/0466 ,  H04B17/101 ,  H04B17/103 ,  H04L5/14

    Abstract: The present invention addresses apparatuses, methods and computer program product for providing improved distance to fault measurement for voltage standing wave ratio (VSWR) on antenna line in networks. An embodiment of he present invention comprises the steps of transmitting a signal to a line to be tested, capturing a forward signal of the signal, capturing a reverse signal of the signal, separating the reflection of the signal in time domain via cross correlation of the forward signal and the reverse signal, and detecting a distance to fault in the line by searching and processing maximum peak position of the captured and separated signals.

    Abstract translation: 本发明涉及用于提供网络中天线线路上的电压驻波比（VSWR）的改进的故障测量距离的设备，方法和计算机程序产品。 本发明的一个实施例包括以下步骤：将信号发送到要测试的线路，捕获信号的正向信号，捕获信号的反向信号，通过信号的互相关分离信号在时域中的反射 正向信号和反向信号，并通过搜索和处理捕获和分离的信号的最大峰值位置来检测线路中的故障距离。

    Using fractional delay computations to improve intermodulation performance
    6.
    发明授权
    Using fractional delay computations to improve intermodulation performance 有权
    使用分数延迟计算来改善互调性能

    公开(公告)号：US09054652B2

    公开(公告)日：2015-06-09

    申请号：US14044385

    申请日：2013-10-02

    Applicant: Nokia Solutions and Networks Oy

    Inventor： Shavantha Kularatna ,  Christian Reichl ,  Bjoern Jelonnek ,  Glenn Schedeen ,  Sandeep Mehta

    IPC: H04B1/04 ,  H03F1/32 ,  H03F3/21 ,  H03F3/19

    CPC classification number: H03F1/3247 ,  H03F1/02 ,  H03F3/19 ,  H03F3/195 ,  H03F3/21 ,  H03F3/213 ,  H03F3/24 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2201/3227 ,  H04B1/0475 ,  H04B1/40 ,  H04B2001/0416 ,  H04B2001/045

    Abstract: Enhancing the intermodulation performance of an RF power amplifier by determining a coarse time delay represented by an integer T1; determining a reference point for a transmitted signal waveform of the RF power amplifier; shifting the waveform by a set of offsets comprising a plurality of non-integer fractional steps from (T1−Xd) to (T1+Xd) where T1 is the integer and Xd is a non-integer fractional step size value for defining fractional steps about the integer T1 such that the non-integer fractional steps progress in a positive direction as well as a negative direction; correlating the transmitted signal waveform with a feedback signal waveform to obtain a respective correlation value for each of corresponding fractional steps; obtaining an accurate fractional delay value by selecting a fractional step having a highest respective correlation value; applying the obtained correct fractional delay value to the transmitted signal waveform to provide a compensated transmitted signal waveform, and combining the compensated transmitted signal waveform with the feedback signal waveform to reduce at least one intermodulation product of the RF power amplifier.

    Abstract translation: 通过确定由整数T1表示的粗略时间延迟来增强RF功率放大器的互调性能; 确定RF功率放大器的发射信号波形的参考点; 将波形移位一组包括从（T1-Xd）到（T1 + Xd）的多个非整数分数步长的偏移量，其中T1是整数，Xd是用于定义分数步长的非整数分数步长值 整数T1使得非整数分数步骤在正方向和负方向上进行; 将发送的信号波形与反馈信号波形相关，以获得每个相应分数步骤的相应相关值; 通过选择具有最高各自的相关值的分数步骤来获得精确的分数延迟值; 将所获得的正确分数延迟值应用于所发送的信号波形以提供经补偿的发送信号波形，以及将经补偿的发送信号波形与反馈信号波形组合以减少RF功率放大器的至少一个互调乘积。

    Using Fractional Delay Computations to Improve Intermodulation Performance
    7.
    发明申请
    Using Fractional Delay Computations to Improve Intermodulation Performance 有权
    使用分数延迟计算来提高互调性能

    公开(公告)号：US20150091643A1

    公开(公告)日：2015-04-02

    申请号：US14044385

    申请日：2013-10-02

    Applicant: Nokia Solutions and Networks Oy

    Inventor： Shavantha Kularatna ,  Christian Reichl ,  Bjoern Jelonnek ,  Glenn Schedeen ,  Sandeep Mehta

    IPC: H03F1/32 ,  H03F3/19 ,  H03F3/21

    CPC classification number: H03F1/3247 ,  H03F1/02 ,  H03F3/19 ,  H03F3/195 ,  H03F3/21 ,  H03F3/213 ,  H03F3/24 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2201/3227 ,  H04B1/0475 ,  H04B1/40 ,  H04B2001/0416 ,  H04B2001/045

    Abstract: Enhancing the intermodulation performance of an RF power amplifier by determining a coarse time delay represented by an integer T1; determining a reference point for a transmitted signal waveform of the RF power amplifier; shifting the waveform by a set of offsets comprising a plurality of non-integer fractional steps from (T1−Xd) to (T1+Xd) where T1 is the integer and Xd is a non-integer fractional step size value for defining fractional steps about the integer T1 such that the non-integer fractional steps progress in a positive direction as well as a negative direction; correlating the transmitted signal waveform with a feedback signal waveform to obtain a respective correlation value for each of corresponding fractional steps; obtaining an accurate fractional delay value by selecting a fractional step having a highest respective correlation value; applying the obtained correct fractional delay value to the transmitted signal waveform to provide a compensated transmitted signal waveform, and combining the compensated transmitted signal waveform with the feedback signal waveform to reduce at least one intermodulation product of the RF power amplifier.

    Abstract translation: 通过确定由整数T1表示的粗略时间延迟来增强RF功率放大器的互调性能; 确定RF功率放大器的发射信号波形的参考点; 将波形移位一组包括从（T1-Xd）到（T1 + Xd）的多个非整数分数步长的偏移量，其中T1是整数，Xd是用于定义分数步长的非整数分数步长值 整数T1使得非整数分数步骤在正方向和负方向上进行; 将发送的信号波形与反馈信号波形相关，以获得每个相应分数步骤的相应相关值; 通过选择具有最高各自的相关值的分数步骤来获得精确的分数延迟值; 将所获得的正确分数延迟值应用于所发送的信号波形以提供经补偿的发送信号波形，以及将经补偿的发送信号波形与反馈信号波形组合以减少RF功率放大器的至少一个互调乘积。

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