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    Extended bandwidth adaptive digital pre-distortion with reconfigurable analog front-ends
    1.
    发明公开
    Extended bandwidth adaptive digital pre-distortion with reconfigurable analog front-ends 审中-公开
    自适应数字Vorverzerrung mit erweiterter Bandbreite mit neukonfigurierbarem analogem前端

    公开(公告)号：EP2876853A1

    公开(公告)日：2015-05-27

    申请号：EP14195033.7

    申请日：2014-11-26

    申请人： BlackBerry Limited

    发明人： Omer, Mohammed ,  Devison, Stephen Arnold ,  Holisaz, Hamed ,  Kravets, Oleksiy

    IPC分类号： H04L27/36 ,  H04B17/13

    CPC分类号： H04L25/08 ,  H03F1/3241 ,  H03F1/3258 ,  H03F3/19 ,  H03F3/245 ,  H03F2200/165 ,  H03F2200/451 ,  H03F2201/3215 ,  H04B17/13 ,  H04B2001/0425 ,  H04L25/03159 ,  H04L25/03343 ,  H04L27/368

    摘要： A pre-distortion method. A signal to be transmitted Tx is pre-distorted to compensate for nonlinearities of a transmitter. The pre-distorted signal is filtered by an EBEE filter and a baseband filter. The EBEE filter has a filter characteristic of that cancels the baseband filter response over the range of frequencies from a first corner frequency of the baseband filter to a frequency of N*f B where N is a highest order of distortion component being cancelled and f B is the bandwidth of the original signal to be transmitted. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.

    摘要翻译： 一种预失真方法。 要发送的信号Tx被预失真以补偿发射机的非线性。 预失真信号由EBEE滤波器和基带滤波器滤波。 EBEE滤波器具有这样的滤波器特征，其在从基带滤波器的第一转角频率到N * f B的频率范围内的基带滤波器响应消除，其中N是失真分量的最高阶消除，f B 是要发送的原始信号的带宽。 该摘要不被认为是限制性的，因为其它实施例可能偏离本摘要中描述的特征。

    Reduction of second order distortion in real time
    3.
    发明公开
    Reduction of second order distortion in real time 审中-公开
    Echtzeit的Reduktion einer zweiten Befehlsverzerrung

    公开(公告)号：EP2779562A1

    公开(公告)日：2014-09-17

    申请号：EP13159314.7

    申请日：2013-03-15

    申请人： BlackBerry Limited

    发明人： Manku, Tajinder ,  Snyder, Christopher Eugene ,  Devison, Stephen Arnold

    IPC分类号： H04L27/36 ,  H04L27/38 ,  H04B1/38 ,  H04B1/52 ,  H04B15/00

    CPC分类号： H04B1/525 ,  H04B1/1027 ,  H04B1/12 ,  H04L27/366 ,  H04L27/38 ,  H04L27/3854

    摘要： In a radio receiver, a method of reducing second order distortion components, involves at a first mixer, mixing an input signal with an oscillator signal to generate an I component of a received radio signal; at a second mixer, mixing the input signal with a phase shifted oscillator signal to generate a Q component of the received radio signal; where the I and Q components of the received signal have a receive bandwidth; computing an estimate of second order distortion components as a power output of the I and Q components between approximately the receive bandwidth and twice the receive bandwidth of the received radio signals; and adjusting an operational parameter of the radio receiver to reduce the estimated value of second order distortion components. This abstract is not to be considered limiting.

    摘要翻译： 在无线电接收机中，减少二阶失真分量的方法涉及在第一混频器中，将输入信号与振荡器信号混合以产生接收的无线电信号的I分量; 在第二混频器中，将输入信号与相移振荡器信号进行混频，以产生所接收的无线电信号的Q分量; 其中接收信号的I和Q分量具有接收带宽; 计算二阶失真分量的估计值作为所接收的无线电信号的接收带宽和接收带宽的两倍之间的I和Q分量的功率输出; 以及调整无线电接收机的操作参数以减小二阶失真分量的估计值。 这个摘要不被认为是限制性的。