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    • 6. 发明公开
    • Modular solid-state radar transmitter apparatus and method for producing variable waveforms
    • 模块化固态雷达发射器设备和用于产生可变波形的方法
    • EP0622638A3
    • 1994-11-30
    • EP94106563.3
    • 1994-04-27
    • INTERNATIONAL STANDARD ELECTRIC CORPORATION
    • Nemit, Jeffrey T.Okamura, Arthur Y.Milan, John M.
    • G01S7/282G01S7/03
    • H03G1/0088G01S7/032G01S7/282H03F3/602
    • A modular solid-state radar transmitter apparatus for producing waveforms whose amplitude may be varied over time. The transmitter achieves pulse modulation on either an intrapulse or pulse to pulse basis, while at the same time reducing stress on individual solid-state modules. Intrapulse modulation and pulse to pulse modulation can be produced with the disclosed modular solid-state transmitter because the number of modules and the sequence in which they are activated is selectable. These selections provide the various desired levels of transmitted power and thus effectively achieve modulation. In order to achieve this intrapulse modulation, a variable combiner is introduced whose coupling factor is coordinated with the module activations. In one embodiment, variable combining is accomplished by the use of RF switching logic for combining pairs of signals in parallel. In this case, RF switches are programmed to act as a conventional combiner when all modules are active. When a module is deactivated, the switches are set so that the active modules are connected to the output or the next stage of combining. Another embodiment uses a series approach to accomplish such variable combining. Here, when all modules are active RF switches and phase shifters are programmed for performance as in a conventional combiner. When a module is deactivated, the phase of the signals within each coupler section is adjusted by means of RF amplifier programming and phase shifters to avoid loss in the termination.
    • 一种模块化固态雷达发射机设备,用于产生其幅度可随时间变化的波形。 该发射器可以在脉冲内或脉冲到脉冲的基础上实现脉冲调制,同时减少单个固态模块上的压力。 因为可以选择模块的数量和它们被激活的顺序,所以利用所公开的模块化固态发射器可以产生内脉冲调制和脉冲到脉冲调制。 这些选择提供了各种期望的发射功率水平,从而有效地实现了调制。 为了实现这种脉内调制,引入了耦合因子与模块激活协调的可变组合器。 在一个实施例中,可变组合通过使用RF开关逻辑来并行地组合信号对来完成。 在这种情况下,当所有模块都处于工作状态时,RF开关被编程为充当常规组合器。 当模块被禁用时,开关被设置为使得活动模块连接到输出或下一个组合阶段。 另一个实施例使用一系列方法来完成这种变量组合。 在这里,当所有模块都是有源RF开关并且移相器被编程为像传统组合器那样的性能。 当一个模块被去激活时,每个耦合器部分内的信号的相位通过RF放大器编程和移相器来调整,以避免终端丢失。
    • 7. 发明公开
    • Modulator/demodulator apparatus
    • Modulations- /解调-Gerät。
    • EP0340978A2
    • 1989-11-08
    • EP89304274.7
    • 1989-04-28
    • International Standard Electric Corporation
    • Cummiskey, PeterEpstein, Marvin AaronGilmour, Paul ArthurKim, Richard J.
    • H04L27/00H04B3/23
    • H04B3/235H04B3/231H04B3/238H04L27/00
    • A modulator/demodulator apparatus has a first digital signal processor (DSP1) that is operable in a full duplex mode for providing digital samples to a coder-decoder (IOP) and receiving transmitted samples therefrom. The first digital signal processor (DSP1) is responsive to received samples for initiating echo cancellation in the received samples. A second digital signal processor (DSP2) is operable to demodulate samples received from the first digital signal processor and output demodulated information therefrom. An input/output processor (IOP) initiates operation of the first and second digital signal processor. The input/output processor receives input information to be transmitted and supplies that information to the first digital signal processor and receives demodulated message information from the second digital signal processor and outputs message information to one or more user devices. The input/output processor also receives transmitter digital samples which are to be demodulated from the first digital signal processor and supplies the transmitted samples to be demodulated to the second digital signal processor. The input/output processor as operable in a full duplex mode.
      Accordingly the input/output processor acts as a system controller in controlling transmission and reception digital signal processors which provide independent transmission and reception functions suitable for a multirate modem apparatus.
    • 调制器/解调器装置具有可在全双工模式下操作的第一数字信号处理器(DSP1),用于向编码器解码器(I0P)提供数字采样并从其接收发送的采样。 第一数字信号处理器(DSP1)响应于接收到的采样以在接收的采样中发起回波消除。 第二数字信号处理器(DSP2)可用于解调从第一数字信号处理器接收的样本并从其输出解调信息。 输入/输出处理器(IOP)启动第一和第二数字信号处理器的操作。 输入/输出处理器接收要发送的输入信息,并将该信息提供给第一数字信号处理器,并从第二数字信号处理器接收解调消息信息,并向一个或多个用户设备输出消息信息。 输入/输出处理器还接收要从第一数字信号处理器解调的发射机数字采样,并将要被解调的发射样本提供给第二数字信号处理器。 输入/输出处理器可以全双工模式工作。 因此,输入/输出处理器用作控制发送和接收数字信号处理器的系统控制器,其提供适用于多速率调制解调器装置的独立发送和接收功能。
    • 9. 发明公开
    • Microwave radio frequency power divider/combiner
    • 微波无线电频率分配器/组合器
    • EP0154958A3
    • 1989-06-28
    • EP85102728.4
    • 1985-03-09
    • International Standard Electric Corporation
    • Craine, Richard WilsonDrabick, Joseph Paul
    • H01P5/12
    • H01P5/12
    • @ The microwave radio frequency power divider/combiner comprises a signal input/output matching network coupled between a signal input/output (1) and a central point (X) of the power divider/combiner. M impedance transformer sections (C) are connected in parallel to the central point (X) and radiate outwardly therefrom with each of the M transformer sections having a first predetermined length, where M is interger greater than one. M pairs (D) of impedance transformers sections are provided with each pair being coupled to an end of a different one of the M transformer sections remote from the central point with each of the transformer sections of the M pairs of transformers sections having the first predetermined length. N output/input ports (1, ..., 16) are each coupled to an end of a different one of the transformer sections of the M pairs of transformer sections remote from the M transformer sections. Each of the N ports are matched to a given impedance and N is equal to 2M. 2N isolation networks include 2N termination im p e-dances each having one terminal thereof connected to ground. The other terminal of each of a given N of the 2N termination impedances are coupled by a different one of first N impedance transformer sections to the N ports. The other terminal of each of the remaining N of the 2N termination impedances are connected by a different one of second N impedance transformer sections to the end of the N transformer section remote from the central point with each of the first and second N transformer sections having the first predetermined length. N transmission line sections each having a second predetermined length different than the first predetermined length interconnect different adjacent ones of the 2N isolation networks in pairs.