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    Apparatus and method for ultra wideband communication using dual band pass filter
    41.
    发明授权
    Apparatus and method for ultra wideband communication using dual band pass filter 有权
    使用双带通滤波器的超宽带通信的装置和方法

    公开(公告)号：US09172425B2

    公开(公告)日：2015-10-27

    申请号：US13966462

    申请日：2013-08-14

    Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  Tsinghua University

    Inventor： Woogeun Rhee ,  Fei Chen ,  Jong Jin Kim ,  Dong Wook Kim ,  Zhihua Wang

    IPC: H04B1/00 ,  H04B17/00 ,  H04B1/719 ,  H04B1/7163 ,  H03D3/26

    CPC classification number: H04B1/719 ,  H03D3/26 ,  H04B1/71637

    Abstract: An apparatus and method for ultra wideband (UWB) communication, using a dual band pass filter (BPF) is disclosed. The UWB communication apparatus may include a first BPF performing a first band pass filtering with respect to a UWB signal, a second BPF that has a center frequency differing from a center frequency of the first BPF, and performs a second band pass filtering with respect to the UWB signal, a first envelope detector that detects a size of a first signal filtered in the first BPF, a second envelope detector that detects a size of a second signal filtered in the second BPF, and a demodulator that demodulates a UWB signal, using the size of the first signal and the size of the second signal.

    Abstract translation: 公开了一种使用双带通滤波器（BPF）的超宽带（UWB）通信的装置和方法。 UWB通信装置可以包括对UWB信号执行第一带通滤波的第一BPF，具有与第一BPF的中心频率不同的中心频率的第二BPF，并且相对于 UWB信号，检测在第一BPF中滤波的第一信号的大小的第一包络检测器，检测在第二BPF中滤波的第二信号的大小的第二包络检测器，以及解调器，其使用 第一信号的大小和第二信号的大小。

    METHOD FOR MODULATING NAVIGATION SIGNAL
    42.
    发明申请
    METHOD FOR MODULATING NAVIGATION SIGNAL 有权
    调制导航信号的方法

    公开(公告)号：US20140219393A1

    公开(公告)日：2014-08-07

    申请号：US14123232

    申请日：2012-03-27

    Applicant: Huazhoug University of Science and Technology

    Inventor： Zuping Tang ,  Jiaolong Wei ,  Tao Yan

    IPC: H04L27/32 ,  H04L25/03

    CPC classification number: H04L27/32 ,  G01S19/02 ,  G01S19/37 ,  H03D3/26 ,  H04B2215/065 ,  H04L23/02 ,  H04L25/03 ,  H04L27/20

    Abstract: The present invention provides a method for modulating a navigation signal, comprising: multiplying a data channel difference signal between upper and lower sidebands by a sine binary subcarrier to obtain an odd timeslot baseband signal of a branch Q, and multiplying a data channel sum signal of the upper and lower sidebands by a cosine binary subcarrier to obtain an odd timeslot baseband signal of a branch I of the data channel; multiplying a pilot channel difference signal between the upper and lower sidebands by the sine binary subcarrier to obtain an even timeslot baseband signal of the branch Q, and multiplying a pilot channel sum signal of the upper and lower sidebands by the cosine binary subcarrier to obtain an even timeslot baseband signal of the branch I; and performing QPSK modulation on the baseband signals of the branch I and branch Q to obtain a TD-AltBOC modulation signal. The present invention can implement transmission of different navigation services at two adjacent frequency bands, and each navigation service comprises a data channel and a pilot channel. The navigation signal of each sub-band may be received independently, or signals of the upper and lower sidebands may be jointly received to obtain high-precision navigation performance.

    Abstract translation: 本发明提供了一种用于调制导航信号的方法，包括：将上，下边带之间的数据信道差信号乘以正弦二进制副载波，以获得分支Q的奇数时隙基带信号，并将 通过余弦二进制副载波上下边带获得数据信道的分支I的奇数时隙基带信号; 将上边带和下边带之间的导频信道差信号乘以正交二进制副载波，以获得分支Q的偶数时隙基带信号，并将上边带和下边带的导频信号和信号乘以余弦二进制副载波，以获得 分支I的时隙基带信号; 对分支I和分支Q的基带信号进行QPSK调制，得到TD-AltBOC调制信号。 本发明可以在两个相邻频带实现不同导航业务的传输，每个导航业务包括数据信道和导频信道。 可以独立地接收每个子带的导航信号，或者可以共同地接收上边带和下边带的信号以获得高精度的导航性能。

    FM detector circuit with unbalanced/balanced conversion
    43.
    发明授权
    FM detector circuit with unbalanced/balanced conversion 失效
    FM检测电路具有不平衡/平衡转换

    公开(公告)号：US07518438B2

    公开(公告)日：2009-04-14

    申请号：US11616908

    申请日：2006-12-28

    Applicant: Akira Kato

    Inventor： Akira Kato

    IPC: H04L27/14

    CPC classification number: H03D3/26 ,  H03D2200/0023 ,  H03H11/32 ,  H04L27/148

    Abstract: An FM detector circuit includes an unbalanced/balanced conversion circuit, a signal synthesis circuit, a parallel circuit including a first diode connected between a first balanced output terminal of the unbalanced/balanced conversion circuit and one signal input terminal of the signal synthesis circuit and a resonator, a parallel circuit including a second diode connected between a second balanced output terminal of the unbalanced/balanced conversion circuit and the other signal input terminal of the signal synthesis circuit and a capacitor element, and a low-pass filter connected to an output terminal of the signal synthesis circuit.

    Abstract translation: FM检测器电路包括不平衡/平衡转换电路，信号合成电路，并联电路，包括连接在不平衡/平衡转换电路的第一平衡输出端和信号合成电路的一个信号输入端之间的第一二极管和 谐振器，包括连接在不平衡/平衡转换电路的第二平衡输出端子和信号合成电路的另一个信号输入端子之间的第二二极管和电容器元件的并联电路以及连接到输出端子的低通滤波器 的信号合成电路。

    Electronically tunable microwave frequency FET discriminator
    46.
    发明授权
    Electronically tunable microwave frequency FET discriminator 失效
    电子可调微波频率鉴频器

    公开(公告)号：US4110700A

    公开(公告)日：1978-08-29

    申请号：US845211

    申请日：1977-10-25

    Applicant: Arye Rosen ,  Edward Mykietyn

    Inventor： Arye Rosen ,  Edward Mykietyn

    IPC: H03D3/26 ,  H03D9/04

    CPC classification number: H03D3/26 ,  H03D9/04

    Abstract: A microwave frequency discriminator comprising a field effect transistor (FET) amplifier including an electronically variable capacitor (varactor), a biasing circuit and a detector. The FET is biased to generate an output RF signal within a predetermined frequency bandwidth in response to an input RF signal of substantially constant power level. The variable capacitor is biased to electronically provide a predetermined impedance to the transistor to augment the frequency roll-off characteristic of the FET. The biasing circuit is used to electronically match the impedance of the FET output to the input of the detector. At such impedance conditions the dc output voltage of the detector varies substantially linearly throughout the frequency bandwidth as a function of the frequency of the input RF signal, approximating the characteristic of a frequency discriminator.

    Abstract translation: 一种微波鉴频器，包括一个包括电子可变电容器（变容二极管）的场效应晶体管（FET）放大器，偏置电路和检测器。 响应于基本上恒定的功率电平的输入RF信号，FET被偏压以在预定频率带宽内产生输出RF信号。 可变电容器被偏置以电子地向晶体管提供预定的阻抗以增加FET的频率滚降特性。 偏置电路用于将FET输出的阻抗与检测器的输入电气匹配。 在这种阻抗条件下，检测器的直流输出电压作为输入RF信号的频率的函数在整个频率带宽内基本上线性地变化，近似于鉴频器的特性。

    Diode-quad bridge circuit means
    47.
    发明授权
    Diode-quad bridge circuit means 失效
    二极管四桥电路方式

    公开(公告)号：US3883812A

    公开(公告)日：1975-05-13

    申请号：US43396874

    申请日：1974-01-16

    Applicant: NASA

    Inventor： HARRISON DEAN R ,  DIMEFF JOHN

    IPC: G01R23/06 ,  G01R27/16 ,  H03D3/00 ,  H03D3/26 ,  H03D1/10 ,  H03K17/56

    CPC classification number: H03D3/00 ,  G01R23/06 ,  G01R27/16 ,  H03D3/26

    Abstract: Diode-quad bridge circuit means for use as a transducer circuit or as a discriminator circuit and including a diode bridge having first, second, third and fourth bridge terminals consecutively coupled together by four diodes polarized in circulating relationship, a first impedance connected between the second bridge terminal and a circuit ground, a second impedance connected between the fourth bridge terminal and the circuit ground, a signal source having a first source terminal capacitively coupled to the first and third bridge terminals and a second source terminal connected to the circuit ground, and an output terminal coupled to the first bridge terminal and at which an output signal may be taken.

    Abstract translation: 二极管四桥电路装置，用作换能器电路或鉴别器电路，并且包括二极管桥，该二极管桥具有通过以循环关系极化的四个二极管连续地耦合在一起的第一，第二，第三和第四桥接端子，第二阻抗连接在第二 桥接端子和电路接地，连接在第四桥接端子和电路接地之间的第二阻抗，具有电容耦合到第一和第三桥接端子的第一源极端子和连接到电路接地的第二源极端子的信号源，以及 输出端子，其耦合到第一桥接端子并且可以在其处采取输出信号。

    Methods and apparatus for fm demodulation using non linear amplifyingand or feedback paths
    48.
    发明授权
    Methods and apparatus for fm demodulation using non linear amplifyingand or feedback paths 失效
    使用非线性放大或反馈曲线进行FM解调的方法和装置

    公开(公告)号：US3714596A

    公开(公告)日：1973-01-30

    申请号：US3714596D

    申请日：1971-01-11

    Applicant: BELL & HOWELL CO

    Inventor： SINGH D

    IPC: H03D3/00 ,  H03D3/26 ,  H03D1/06

    CPC classification number: H03D3/00 ,  H03D3/26

    Abstract: This disclosure depicts systems and methods especially for demodulating a narrow band of frequency-modulated signals. In one embodiment a closed-loop amplification system has a negative feedback circuit comprising a highly frequency-selective RC filter network. Another embodiment discloses the use of combined positive and negative feedback having a net negative effect. Each system includes at least one non-linear component to cause the system frequency response to have a substantially linear negative slope across the said band of frequencies.

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