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38 条记录 (耗时 0.029 秒)

    Offset correction for a homodyne radio
    1.
    发明授权
    Offset correction for a homodyne radio 失效
    零差收音机的偏移校正

    公开(公告)号：US5748681A

    公开(公告)日：1998-05-05

    申请号：US549363

    申请日：1995-10-27

    申请人： Vittorio Comino ,  Gerard Joseph Foschini ,  Isam M. Habbab ,  Sanjay Kasturia ,  Jack Salz ,  Michael Edward Prise ,  Ravi Subramanian

    发明人： Vittorio Comino ,  Gerard Joseph Foschini ,  Isam M. Habbab ,  Sanjay Kasturia ,  Jack Salz ,  Michael Edward Prise ,  Ravi Subramanian

    IPC分类号： H04L7/027 ,  H04L7/04 ,  H04L7/10 ,  H04L25/06

    CPC分类号： H04L25/061 ,  H04L7/046 ,  H04L7/027 ,  H04L7/041 ,  H04L7/10

    摘要： DC offset cancellation and timing recovery is provided in a homodyne receiver. The homodyne receiver demodulates an RF signal to produce a baseband signal. An initial offset correction module determines an initial DC offset of the baseband signal. An initial offset correction is applied to the baseband signal to provide an initial corrected baseband signal. Wherein, a dynamic DC offset correction module determines a dynamic DC offset. A dynamic DC offset correction is applied to the initial corrected baseband signal providing a dynamic corrected baseband signal. A timing signal is acquired from the baseband signal for synchronizing the receiver to a transmitter. A method for correcting DC offset of a baseband signal in a homodyne receiver is also described.

    摘要翻译： 在零差接收机中提供DC偏移消除和定时恢复。 零差接收机解调RF信号以产生基带信号。 初始偏移校正模块确定基带信号的初始DC偏移。 对基带信号施加初始偏移校正以提供初始校正的基带信号。 其中，动态DC偏移校正模块确定动态DC偏移。 将动态DC偏移校正应用于提供动态校正基带信号的初始校正基带信号。 从用于使接收机同步到发射机的基带信号获取定时信号。 还描述了用于校正零差接收机中的基带信号的DC偏移的方法。

    All digital if-to-baseband signal converter
    4.
    发明授权
    All digital if-to-baseband signal converter 失效
    所有数字即时到基带信号转换器

    公开(公告)号：US5539776A

    公开(公告)日：1996-07-23

    申请号：US158118

    申请日：1993-11-24

    申请人： Ravi Subramanian

    发明人： Ravi Subramanian

    IPC分类号： H03D7/00 ,  H03D7/16 ,  H03D13/00 ,  H04L27/156 ,  H04L27/233 ,  H03D3/22

    CPC分类号： H03D7/161 ,  H03D7/00 ,  H03D13/001 ,  H03D2200/005 ,  H03D2200/006 ,  H03D2200/007

    摘要： An intermediate frequency (IF) to baseband frequency signal converter for decoding an analog IF signal using phase information contained in the IF signal includes a first signal generator for generating an analog square wave signal from the IF signal. The signal converter also includes a second signal generator for generating a local phase reference signal, and a phase difference determinator for determining at a particular sampling interval a phase difference between a phase of the analog square wave signal and a phase of the local phase reference signal, wherein the phase difference represents a symbol which the signal converter has decoded from the IF signal.

    摘要翻译： 使用包含在IF信号中的相位信息来解码模拟IF信号的基带频率信号转换器的中频（IF）包括用于从IF信号产生模拟方波信号的第一信号发生器。 信号转换器还包括用于产生局部相位参考信号的第二信号发生器和用于在特定取样间隔确定模拟方波信号的相位与局部相位参考信号的相位之间的相位差的相位差确定器 ，其中所述相位差表示所述信号转换器从所述IF信号解码的符号。

    Method of estimating the speed of a mobile unit in a digital wireless communication system
    5.
    发明授权
    Method of estimating the speed of a mobile unit in a digital wireless communication system 失效
    在数字无线通信系统中估计移动单元的速度的方法

    公开(公告)号：US5438595A

    公开(公告)日：1995-08-01

    申请号：US108061

    申请日：1993-08-17

    申请人： Jong-Keung Cheng ,  Ravi Subramanian

    发明人： Jong-Keung Cheng ,  Ravi Subramanian

    IPC分类号： G01S11/10 ,  H04L7/033 ,  H04L7/04 ,  H04L27/06

    CPC分类号： H04L7/0334 ,  G01S11/10 ,  H04L7/042

    摘要： In a digital wireless communication system communicating between a mobile unit and a stationary unit, a received digitally encoded signal is sampled to produce a first sampled digital signal having a plurality of symbols. The short term energy over a plurality of a contiguous symbols is measured. The short term energy symbol over a first plurality of a contiguous short term energy points is measured. The short term energy average over a second plurality of contiguous short term energy points is measured. The second plurality of contiguous short term energy points is spaced apart from the first plurality of contiguous short term energy points. The difference between the first short term energy average and the second short term energy average is calculated to derive an estimate of the speed of the mobile unit relative to the base unit.

    摘要翻译： 在移动单元和固定单元之间通信的数字无线通信系统中，接收到的数字编码信号被采样以产生具有多个符号的第一采样数字信号。 测量多个连续符号中的短期能量。 测量第一多个连续的短期能量点中的短期能量符号。 测量第二组连续的短期能量点的短期能量平均值。 所述第二多个连续的短期能量点与所述第一多个相邻的短期能量点间隔开。 计算第一短期能量平均值和第二短期能量平均值之间的差异以导出移动单元相对于基本单元的速度的估计。

    METHODS FOR PRODUCING OZONE AND OXYGEN MIXTURES
    6.
    发明申请
    METHODS FOR PRODUCING OZONE AND OXYGEN MIXTURES 审中-公开

    公开(公告)号：US20200038801A1

    公开(公告)日：2020-02-06

    申请号：US16052937

    申请日：2018-08-02

    申请人： Steven Finley ,  Frank R. Fitch ,  Ravi Subramanian

    发明人： Steven Finley ,  Frank R. Fitch ,  Ravi Subramanian

    IPC分类号： B01D53/04 ,  C01B13/10

    摘要： A method for the continuous production of ozone and recovery of oxygen in a purge cycle adsorption process having four adsorbent beds. The method has the steps of feeding a mixture of ozone and oxygen to a first and second adsorbent bed wherein the first and the second adsorbent bed adsorb ozone and allow oxygen to pass through; recovering the oxygen from the first bed; feeding the oxygen from the second bed to a fourth adsorbent bed, wherein ozone is desorbed from the fourth bed; feeding clean dry air through a valve to the third adsorbent bed, and measuring the flow rate of the clean dry air through the valve, comparing this flow rate to a pre-calculated value and adjusting the flow rate of the clean dry air to equal the pre-calculated value; desorbing ozone from the third bed; and recovering ozone from the third bed and the fourth bed.

    Configurable all-digital coherent demodulator system for spread spectrum applications
    7.
    发明授权
    Configurable all-digital coherent demodulator system for spread spectrum applications 有权
    可配置的全数字相干解调器系统，用于扩频应用

    公开(公告)号：US08204161B2

    公开(公告)日：2012-06-19

    申请号：US12708847

    申请日：2010-02-19

    申请人： Ravi Subramanian

    发明人： Ravi Subramanian

    IPC分类号： H04L27/14 ,  H04L27/16 ,  H04L27/22

    CPC分类号： H04B1/0003 ,  H04B1/0007 ,  H04B1/28 ,  H04B1/406 ,  H04B1/70735 ,  H04B1/7085 ,  H04B2201/70701 ,  H04B2201/70711 ,  H04L25/0204

    摘要： A configurable all-digital coherent demodulator system for spread spectrum digital communications is disclosed herein. The demodulator system includes an extended and long code demodulator (ELCD) coupled to a traffic channel demodulator (TCD) and a parameter estimator (PE). The demodulator also includes a pilot assisted correction device (PACD) that is coupled to the PE and the TCD. The ELCD provides a code-demodulated signal to the TCD and the PE. In turn, the TCD provides a demodulated output data signal to the PE. The PACD corrects the phase error of the demodulated output data based on an error estimate that is fed forward from the PE. Accumulation operations in the ELCD, TCD, and PE are all programmable. Similarly, a phase delay in the PACD is also programmable to provide synchronization with the error estimate from the PE.

    摘要翻译： 本文公开了一种用于扩频数字通信的可配置全数字相干解调器系统。 解调器系统包括耦合到业务信道解调器（TCD）和参数估计器（PE）的扩展和长码解调器（ELCD）。 解调器还包括耦合到PE和TCD的导频辅助校正装置（PACD）。 ELCD向TCD和PE提供码解调信号。 反过来，TCD向PE提供解调的输出数据信号。 基于从PE馈送的误差估计，PACD校正解调输出数据的相位误差。 ELCD，TCD和PE中的累加操作都可编程。 类似地，PACD中的相位延迟也是可编程的，以提供与来自PE的误差估计的同步。

    Method of generating a configuration for a configurable spread spectrum communication device
    8.
    发明授权
    Method of generating a configuration for a configurable spread spectrum communication device 有权
    生成可配置扩频通信设备的配置的方法

    公开(公告)号：US06701431B2

    公开(公告)日：2004-03-02

    申请号：US09772582

    申请日：2001-01-29

    申请人： Ravi Subramanian ,  Christopher Woodthorpe

    发明人： Ravi Subramanian ,  Christopher Woodthorpe

    IPC分类号： G06F9445

    CPC分类号： H04B1/0003 ,  H04B1/707 ,  H04B2201/7071 ,  H04B2201/70711

    摘要： A method of generating a configuration for a configurable spread spectrum communication device is disclosed herein. The method, implemented on a computing device having a processor and a computer readable memory, starts with a first step of receiving an input identifying a desired function, and a desired operation within the desired function, to be implemented by a configurable communication device. In a subsequent step, a signal flow path for the desired operation is generated by the computing device. Next, the desired operation is mapped onto a computing element within the configurable communication device; the computing element having localized control and being function-specific. The aforementioned steps are repeated to satisfy multiple operations required to enable the desired function. Next, a configurable interconnect of the configurable electronic device is configured to enable the mapping operation and signal flow path across a computing element for each of the multiple operations which together enable the desired function.

    摘要翻译： 本文公开了一种生成可配置扩频通信设备的配置的方法。 在具有处理器和计算机可读存储器的计算设备上实现的方法开始于接收标识期望功能的输入以及期望功能内的期望操作的第一步骤，以由可配置通信设备来实现。 在随后的步骤中，用于期望操作的信号流路径由计算设备产生。 接下来，将期望的操作映射到可配置通信设备内的计算元件上; 该计算元件具有局部控制并且是功能特定的。 重复上述步骤以满足实现期望功能所需的多个操作。 接下来，可配置电子设备的可配置互连被配置为使得能够跨越计算元件的映射操作和信号流路径用于多个操作中的每一个，这些操作共同实现期望的功能。