Feedforward amplifier
    11.
    发明公开
    Feedforward amplifier 有权
    前馈放大器

    公开(公告)号:EP1041712A2

    公开(公告)日:2000-10-04

    申请号:EP00106088.8

    申请日:2000-03-30

    IPC分类号: H03F1/32

    摘要: In a distortion injection path (15) wherein a detected distortion component of a main amplifier (23) becomes amplified, distortion by an auxiliary amplifier (29a) is detected by an auxiliary distortion detector (42) composed of a variable attenuator (27a), a variable phase shifter (28a), a first auxiliary amplifier (29a), a delay line (36) and a phase inverter (37), and the detected distortion is cancelled by an auxiliary distortion canceller (43) composed of a variable attenuator (27b), a variable phase shifter (28a), a second auxiliary amplifier (29b) and a delay line (39), thereby increasing the efficiency of the amplifier.

    摘要翻译: 在主放大器(23)的检测失真分量被放大的失真注入路径(15)中,由可变衰减器(27a)构成的辅助失真检测器(42)检测辅助放大器(29a) 一个可变移相器(28a),一个第一辅助放大器(29a),一个延迟线(36)和一个反相器(37),并且所检测的失真由一个由可变衰减器(43)构成的辅助失真消除器 27b),可变移相器(28a),第二辅助放大器(29b)和延迟线(39),从而提高放大器的效率。

    Reduction of peak to average power ratio in MCM systems
    12.
    发明公开
    Reduction of peak to average power ratio in MCM systems 失效
    Mehrträgersystemen的Verringerung desVerhältnissesvon Spitzen-zu Durchschnittsleistung

    公开(公告)号:EP0836303A2

    公开(公告)日:1998-04-15

    申请号:EP97117507.0

    申请日:1997-10-09

    IPC分类号: H04L27/26

    CPC分类号: H04L27/2614 H04L27/2602

    摘要: In a method for transmission and reception over N transmission channels, the transmitting side performs orthonormal transform processing of N-channel modulated signals so that the resulting transformed output signals have lower cross-correlation, and the transformed N-channel signals are multiplexed and transmitted over the N-channels. At the receiving side, the N-channel received signals are subjected to inverse orthonormal transform processing to obtain N-channel modulated signals, which are demodulated to obtain a digital signal.

    摘要翻译: 在通过N个传输信道进行发送和接收的方法中,发送侧执行N信道调制信号的正交变换处理,使得所得变换的输出信号具有较低的互相关,并且变换的N信道信号被复用并传输 N通道。 在接收侧,对N信道接收信号进行逆正交变换处理,以获得被解调以获得数字信号的N信道调制信号。