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50 条记录 (耗时 0.023 秒)

    High sensitivity radio receiver
    21.
    发明公开
    High sensitivity radio receiver 审中-公开
    Funkempfängermit hoher Empfindlichkeit

    公开(公告)号：EP1014480A2

    公开(公告)日：2000-06-28

    申请号：EP99124917.8

    申请日：1999-12-14

    申请人： NTT MOBILE COMMUNICATIONS NETWORK INC.

    发明人： Mimura, Tetsuya ,  Satoh, Kei ,  Narahashi, Shoichi ,  Nojima, Toshio

    IPC分类号： H01Q1/36 ,  H01Q3/30 ,  H01Q1/24 ,  H04B1/00 ,  G01R33/34

    CPC分类号： H01Q3/36 ,  H01Q1/364 ,  H04B1/036 ,  H04B1/18 ,  H04B7/084

    摘要： A receiver directs the center of the main beam of the antenna directivity response in a desired direction by passing signals received by n antenna elements 1a to 1d through a phase shifter 3. An output from the phase shifter 3 is passed through a receiving filter 5 and is then amplified by a low noise amplifier 6 to be delivered as an output. The phase shifter 3 is confined together with the receiving filter 5 and the amplifier 6 in a cryostat 8, and the phase shifter 3 as well as the receiving filter 5 and the amplifier 6 are cooled down by cooling means 9 through a cold stage 9a, whereby the thermal noises generated therein are reduced to a minimum.

    摘要翻译： 接收器通过将n个天线元件1a至1d接收的信号通过移相器3，将天线方向性响应的主波束的中心在期望的方向上引导。来自移相器3的输出通过接收滤波器5和 然后被低噪声放大器6放大，作为输出被输送。 移相器3与接收滤波器5和放大器6一起被限制在低温恒温器8中，并且移相器3以及接收滤波器5和放大器6通过冷却装置9通过冷级9a冷却， 由此其中产生的热噪声减小到最小。

    Device for testing an amplifier
    22.
    发明公开
    Device for testing an amplifier 失效
    Einrichtung zum Testen einesVerstärkers。

    公开(公告)号：EP0620446A2

    公开(公告)日：1994-10-19

    申请号：EP94105558.4

    申请日：1994-04-11

    申请人： JAPAN RADIO CO., LTD ,  NTT MOBILE COMMUNICATIONS NETWORK INC.

    发明人： Sakamoto, Hironori ,  Ito, Akira ,  Fujiwara, Masaaki ,  Nojima, Toshio

    IPC分类号： G01R31/28 ,  H04B17/00 ,  G01R23/20

    CPC分类号： G01R31/2825 ,  H03F1/3229

    摘要： A plurality of PN modulators (28) are provided corresponding to a plurality of oscillators (22) at stages preceding or following them, or fluctuation is given to division ratios at the oscillators (22). Since each of n carriers combined by a combiner (24) contains phase fluctuation, the possibility that the peaks will overlap each other or that the carriers having opposite phases will negate each other is very low. The peak power in signals supplied to the amplifier (14) to be tested is unlikely to vary, enabling accurate evaluation or testing.

    摘要翻译： 在它们之前或之后的阶段对应于多个振荡器（22）提供多个PN调制器（28），或者在振荡器（22）处给出分频比的波动。 由于由组合器（24）组合的n个载波中的每一个包含相位波动，所以峰将彼此重叠或者具有相反相位的载波彼此否定的可能性非常低。 提供给要测试的放大器（14）的信号的峰值功率不太可能发生变化，从而能够进行准确的评估或测试。

    Amplifying device
    24.
    发明公开
    Amplifying device 失效

    公开(公告)号：EP1087520A3

    公开(公告)日：2001-04-18

    申请号：EP00125616.3

    申请日：1996-11-15

    申请人： NTT Mobile Communications Network Inc.

    发明人： Kumagai, Ken ,  Nojima, Toshio ,  Narahashi, Shoichi

    IPC分类号： H03F1/32

    CPC分类号： H03F1/3229 ,  H03F1/3241

    摘要： An amplifying device comprises signal separator means (43) for separating an input signal fed to an input terminal (1) into a main signal having its envelope power limited to a value below a predetermined value and a difference signal corresponding to the difference between said main signal and said input signal; a main amplifier (46) for amplifying said main signal; an auxiliary amplifier (47) for amplifying said difference signal; and power combining means (48) for combining the outputs from said main amplifier and said auxiliary amplifier into a composite output for output to an output terminal.

    Reduction of peak to average power ratio in MCM systems
    25.
    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

    申请人： NTT MOBILE COMMUNICATIONS NETWORK INC.

    发明人： Suzuki, Yasunori ,  Kumagai, Ken ,  Nojima, Toshio

    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。

    Amplifying device
    29.
    发明公开
    Amplifying device 失效
    放大器

    公开(公告)号：EP1087520A2

    公开(公告)日：2001-03-28

    申请号：EP00125616.3

    申请日：1996-11-15

    申请人： NTT Mobile Communications Network Inc.

    发明人： Kumagai, Ken ,  Nojima, Toshio ,  Narahashi, Shoichi

    IPC分类号： H03F1/32

    CPC分类号： H03F1/3229 ,  H03F1/3241

    摘要： An amplifying device comprises signal separator means (43) for separating an input signal fed to an input terminal (1) into a main signal having its envelope power limited to a value below a predetermined value and a difference signal corresponding to the difference between said main signal and said input signal; a main amplifier (46) for amplifying said main signal; an auxiliary amplifier (47) for amplifying said difference signal; and power combining means (48) for combining the outputs from said main amplifier and said auxiliary amplifier into a composite output for output to an output terminal.

    摘要翻译： 放大装置包括信号分离装置（43），用于将馈送到输入端（1）的输入信号分离成其包络功率被限制在低于预定值的值的主信号和对应于所述主 信号和所述输入信号; 主放大器（46），用于放大所述主信号; 辅助放大器（47），用于放大所述差分信号; 以及功率组合装置（48），用于将来自所述主放大器和所述辅助放大器的输出组合成复合输出以输出到输出端。

    Feedforward amplifier
    30.
    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

    申请人： NTT Mobile Communications Network Inc.

    发明人： Suzuki, Yasunori ,  Nojima, Toshio

    IPC分类号： H03F1/32

    CPC分类号： H03F1/3229 ,  H03F1/0211 ,  H03F1/0261 ,  H03F1/0288 ,  H03F1/3235

    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。