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55 条记录 (耗时 0.016 秒)

    Automatic output power controller
    53.
    发明授权
    Automatic output power controller 失效
    自动输出功率控制器

    公开(公告)号：US5212814A

    公开(公告)日：1993-05-18

    申请号：US686986

    申请日：1991-04-18

    申请人： Yasushi Iwane

    发明人： Yasushi Iwane

    IPC分类号： H04L27/36 ,  H03G3/20 ,  H04L27/20

    CPC分类号： H03G3/3042 ,  H03G3/3047

    摘要： An automatic output power controller controls signals output by an amplifier amplifying a modulated wave with its envelope varying due to the modulation so that the mean power becomes constant. An equi-output point extraction circuit extracts timing of the output power of the amplifier becoming a constant value from a base band signal or the like, and supplies the timing to a sample-and-hold circuit. The sample-and-hold circuit samples and holds the output power. Difference between the sample-and-hold value and the reference value is supplied to an output power adjusting circuit, and the output power adjusting circuit controls signals output by the amplifier in accordance with the difference so that the mean power becomes constant.

    摘要翻译： 自动输出功率控制器控制放大放大调制波的放大器的信号，该调制波的包络由于调制而变化，使得平均功率变得恒定。 等输出点提取电路从基带信号等提取放大器的输出功率的定时成为恒定值，并将定时提供给采样保持电路。 采样和保持电路采样并保持输出功率。 采样保持值与参考值之间的差异被提供给输出功率调节电路，输出功率调节电路根据差值来控制由放大器输出的信号，使得平均功率变得恒定。

    Demodulated data recognition and decision device
    54.
    发明授权
    Demodulated data recognition and decision device 失效
    解调数据识别和决策设备

    公开(公告)号：US5105447A

    公开(公告)日：1992-04-14

    申请号：US463214

    申请日：1990-01-10

    申请人： Yasushi Iwane

    发明人： Yasushi Iwane

    IPC分类号： H04L27/00 ,  H04L7/033 ,  H04L25/08

    CPC分类号： H04L7/0331

    摘要： A demodulated data recognition and decision device is disclosed in which an input signal such as an intermediate frequency signal or the like is demodulated and digital data corresponding to a demodulated base band signal is recovered. This device is characterized in that a sample clock rate having n-times the bit rate of the digital data is applied to perform a sampling operation wherein a decision of the binary value at the plurality of points in the base band signal is carried out to obtain a decision under majority rule. The value decided under majority rule and then applied as the demodulated digital data is substantially free of errors which might occur from jitters in the base band signal and other sources of noise.

    Method for correcting waveform data in digital signal modulation and base band signal generator using data provided by this method
    55.
    发明授权
    Method for correcting waveform data in digital signal modulation and base band signal generator using data provided by this method 失效
    使用该方法提供的数据来校正数字信号调制中的波形数据和基带信号发生器的方法

    公开(公告)号：US5073901A

    公开(公告)日：1991-12-17

    申请号：US555703

    申请日：1990-07-23

    申请人： Yasushi Iwane

    发明人： Yasushi Iwane

    IPC分类号： H04L27/12 ,  H04L27/20

    CPC分类号： H04L27/2003

    摘要： A method for correcting quantized waveform data which are formed by quantizing a baseband waveform, so optimized as to make a sum of errors included in a single bit internal of input digital data smaller than one quantization step, and are output as the baseband waveform which is to be accumulated or integrated in the requirement of the system (such as frequency-to-phase conversion). Since an accumulated sum of the quantized waveform data has some deriation from the real baseband waveform when those quantized waveform data are accumulated so as to generate phase information from frequency information, the quantized waveform data have to be corrected previously. For the purpose of reducing the accumulated error, this method involves the steps of defining states corresponding to input data patterns, establishing simultaneous equations corresponding to state transition routes respectively, solving the equations, and deciding correcting values for the quantized data.