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    • 13. 发明授权
    • Spread spectrum communication device
    • 传播光谱通信设备
    • US5228055A
    • 1993-07-13
    • US829469
    • 1992-01-31
    • Yoshitaka UchidaMamoru EndoMasahiro HamatsuShigeo Akazawa
    • Yoshitaka UchidaMamoru EndoMasahiro HamatsuShigeo Akazawa
    • H04J13/00
    • H04J13/00H04J13/0074
    • On the transmitter side of a spread spectrum communication device according to the present invention, transmission date are converted into a plurality of parallel data sets by a serial-parallel convertor and spread-spectrum-modulation is effected by means of PN code generators and selectors. Different modulated outputs are delayed by delay devices, using a sounder channel and the phase thereof as a reference. The delayed outputs and the output of the sounder channel are added by an adder, multiplexed and transmitted.On the receiver side correlation of a received signal with a reference signal is formed by a correlator and a correlation pulse is obtained from the correlation output. Data are reproduced by means of a sounder detecting circuit, a sampling pulse generating circuit and an information detecting circuit.In this way data reproduction can be effected with a high efficiency by means of a single correlator.
    • 在根据本发明的扩展频谱通信设备的发射机侧,通过串行 - 并行转换器将传输日期转换成多个并行数据集,并且通过PN码发生器和选择器实现扩频调制。 不同的调制输出由延迟器延迟,使用发声器通道及其相位作为参考。 延迟输出和发声器通道的输出由加法器相加,进行多路传输。 在接收机侧,通过相关器形成接收信号与参考信号的相关性,并从相关输出获得相关脉冲。 数据通过发声器检测电路,采样脉冲发生电路和信息检测电路再现。 以这种方式,可以通过单个相关器以高效率实现数据再现。
    • 14. 发明授权
    • Narrow band disturbing wave detecting device
    • 窄带干扰波检测装置
    • US5148413A
    • 1992-09-15
    • US836988
    • 1992-02-14
    • Mamoru EndoYoshitaka Uchida
    • Mamoru EndoYoshitaka Uchida
    • H03H9/64H04B1/10H04B1/71H04J13/00
    • H04B1/1036H04B1/7101
    • A device according to the present invention comprises a variable notch filter, a PN code generator, a VCO and a convolver. The frequency is swept within the band of the convolver by the VCO after having stopped operations of the variable notch filter and the PN code generator and the output of the convolver at this time is detected. When the output thus detected exceeds a threshold, a detected signal is sent to the variable notch filter to control the notch part thereof so as to correspond to disturbing wave to remove the disturbing wave from a received signal. Since the convolver is used not only for a correlator but also for a disturbing wave detector, the construction can be simple and cheap.
    • 根据本发明的装置包括可变陷波滤波器,PN码发生器,VCO和卷积器。 在可变陷波滤波器和PN码发生器停止操作之后,频率在VCO的频带内被扫描,并且此时检测到卷积器的输出。 当检测到的输出超过阈值时,将检测信号发送到可变陷波滤波器,以控制其陷波部分,以对应于干扰波,以从接收信号中去除干扰波。 由于卷积器不仅用于相关器,而且用于干扰波检测器,结构可以简单且便宜。
    • 16. 发明授权
    • Process for producing carboxylic acid anhydrides
    • 制备羧酸酐的方法
    • US4830789A
    • 1989-05-16
    • US946462
    • 1986-12-24
    • Masayoshi HinenoyaMamoru Endo
    • Masayoshi HinenoyaMamoru Endo
    • C07C51/567
    • C07C51/567
    • The present invention provides (1) a process for producing a colorless aromatic acid anhydride having a high purity in a high yield by reacting an aromatic carboxylic acid having a carboxyl group bonded to the aromatic nucleus with a lower aliphatic acid anhydride in the presence of at least one metal ion selected from the group consisting of ions of metals of Groups, I, II, III, V, VII and VIII of the periodic table and (2) a process for producing an acid anhydride by an exchange reaction of an organic carboxylic acid anhydride and a carboxylic acid in the presence of at least 5 ppm of at least one metal ion selected from the group consisting of Co, Ni, Mn, Fe, Li, Na, K, Mg, Ca, Cu, Zn, Al, Ti and V ions.
    • 本发明提供(1)通过使具有与芳香核键合的羧基的芳香族羧酸与低级脂肪酸酐在存在下进行反应,从而以高收率制备高纯度的无色芳香酸酐的方法 选自周期表第I,II,III,V,VII和VIII族金属的离子的至少一种金属离子,和(2)通过有机羧酸的交换反应制备酸酐的方法 在至少5ppm的选自Co,Ni,Mn,Fe,Li,Na,K,Mg,Ca,Cu,Zn,Al中的至少一种金属离子的存在下, Ti和V离子。